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At least 19 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2021

Magnetism and structure of Fe- and Co-substituted Mn 2 NiSn

Mn-containing Heuslers are important magnetic shape-memory alloys for fast and precise actuators in manufacturing, robotics, surgery, and other applications. Among the key requirements are a high magnetization and favorable thermal properties, especially a high Curie temperature. In this work, the effect of Fe and Co substitution on the structure and magnetism of Mn 2 NiSn alloys is investigated. The Heusler alloys have been produced by melt spinning and characterized by X-ray diffraction, magnetometry, and electron-transport measurements. It was found that Co substitution for Mn enhances the Curie temperature of Mn 2 NiSn and both Co and Fe substitution improve its magnetization. Further, these improvements are accompanied by reduced thermal and magnetic hysteresis losses and by interesting structural changes, namely improved chemical order and site occupancies characteristic of quaternary (Y-ordered) Heuslers.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Nd(NiSn)2 by Materials Project

Nd(NiSn)2 crystallizes in the tetragonal P4/nmm space group. The structure is three-dimensional. Nd is bonded in a 12-coordinate geometry to eight Ni and eight Sn atoms. There are four shorter (3.31 Å) and four longer (3.43 Å) Nd–Ni bond lengths. There are four shorter (3.37 Å) and four longer (3.44 Å) Nd–Sn bond lengths. There are two inequivalent Ni sites. In the first Ni site, Ni is bonded in a 9-coordinate geometry to four equivalent Nd and five Sn atoms. There are one shorter (2.51 Å) and four longer (2.58 Å) Ni–Sn bond lengths. In the second Ni site, Ni is bonded in a 8-coordinate geometry to four equivalent Nd and four equivalent Sn atoms. All Ni–Sn bond lengths are 2.57 Å. There are two inequivalent Sn sites. In the first Sn site, Sn is bonded in a 9-coordinate geometry to four equivalent Nd and five Ni atoms. In the second Sn site, Sn is bonded in a 12-coordinate geometry to four equivalent Nd and four equivalent Ni atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Pr(NiSn)2 by Materials Project

Pr(NiSn)2 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Pr is bonded in a 8-coordinate geometry to eight equivalent Ni and eight equivalent Sn atoms. All Pr–Ni bond lengths are 3.45 Å. All Pr–Sn bond lengths are 3.45 Å. Ni is bonded in a 4-coordinate geometry to four equivalent Pr and four equivalent Sn atoms. All Ni–Sn bond lengths are 2.52 Å. Sn is bonded in a 9-coordinate geometry to four equivalent Pr, four equivalent Ni, and one Sn atom. The Sn–Sn bond length is 2.87 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Nd(NiSn)2 by Materials Project

Nd(NiSn)2 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Nd is bonded in a 8-coordinate geometry to eight equivalent Ni and eight equivalent Sn atoms. All Nd–Ni bond lengths are 3.43 Å. All Nd–Sn bond lengths are 3.43 Å. Ni is bonded in a 4-coordinate geometry to four equivalent Nd and four equivalent Sn atoms. All Ni–Sn bond lengths are 2.52 Å. Sn is bonded in a 9-coordinate geometry to four equivalent Nd, four equivalent Ni, and one Sn atom. The Sn–Sn bond length is 2.85 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sm(NiSn)2 by Materials Project

Sm(NiSn)2 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Sm is bonded in a 8-coordinate geometry to eight equivalent Ni and eight equivalent Sn atoms. All Sm–Ni bond lengths are 3.42 Å. All Sm–Sn bond lengths are 3.42 Å. Ni is bonded in a 4-coordinate geometry to four equivalent Sm and four equivalent Sn atoms. All Ni–Sn bond lengths are 2.51 Å. Sn is bonded in a 9-coordinate geometry to four equivalent Sm, four equivalent Ni, and one Sn atom. The Sn–Sn bond length is 2.83 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on NiSn by Materials Project

NiSn crystallizes in the orthorhombic Pbam space group. The structure is three-dimensional. there are five inequivalent Ni sites. In the first Ni site, Ni is bonded in a 11-coordinate geometry to four Ni and seven Sn atoms. There are a spread of Ni–Ni bond distances ranging from 2.68–3.03 Å. There are a spread of Ni–Sn bond distances ranging from 2.62–2.86 Å. In the second Ni site, Ni is bonded in a 9-coordinate geometry to three Ni and six Sn atoms. There are two shorter (2.63 Å) and one longer (2.82 Å) Ni–Ni bond lengths. There are a spread of Ni–Sn bond distances ranging from 2.57–2.66 Å. In the third Ni site, Ni is bonded in a 10-coordinate geometry to three Ni and seven Sn atoms. There are a spread of Ni–Sn bond distances ranging from 2.65–2.84 Å. In the fourth Ni site, Ni is bonded in a 8-coordinate geometry to four Ni and six Sn atoms. Both Ni–Ni bond lengths are 2.61 Å. There are two shorter (2.54 Å) and four longer (2.62 Å) Ni–Sn bond lengths. In the fifth Ni site, Ni is bonded in a 10-coordinate geometry to four Ni and six Sn atoms. There are four shorter (2.65 Å) and two longer (2.68 Å) Ni–Sn bond lengths. There are four inequivalent Sn sites. In the first Sn site, Sn is bonded in a 7-coordinate geometry to seven Ni atoms. In the second Sn site, Sn is bonded in a 6-coordinate geometry to six Ni atoms. In the third Sn site, Sn is bonded in a 6-coordinate geometry to six Ni atoms. In the fourth Sn site, Sn is bonded in a 7-coordinate geometry to seven Ni atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Th(NiSn)2 by Materials Project

Th(NiSn)2 crystallizes in the tetragonal P4/nmm space group. The structure is three-dimensional. Th is bonded in a 8-coordinate geometry to eight Ni and eight Sn atoms. There are four shorter (3.25 Å) and four longer (3.44 Å) Th–Ni bond lengths. There are four shorter (3.33 Å) and four longer (3.49 Å) Th–Sn bond lengths. There are two inequivalent Ni sites. In the first Ni site, Ni is bonded in a 8-coordinate geometry to four equivalent Th and four equivalent Sn atoms. All Ni–Sn bond lengths are 2.56 Å. In the second Ni site, Ni is bonded in a 9-coordinate geometry to four equivalent Th and five Sn atoms. There are one shorter (2.49 Å) and four longer (2.57 Å) Ni–Sn bond lengths. There are two inequivalent Sn sites. In the first Sn site, Sn is bonded in a 9-coordinate geometry to four equivalent Th and five Ni atoms. In the second Sn site, Sn is bonded in a 4-coordinate geometry to four equivalent Th and four equivalent Ni atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on ZrSc(NiSn)2 by Materials Project

ScZr(NiSn)2 is half-Heusler-derived structured and crystallizes in the trigonal R3m space group. The structure is three-dimensional. Sc is bonded in a 4-coordinate geometry to four Ni and six Sn atoms. All Sc–Ni bond lengths are 2.68 Å. There are three shorter (3.08 Å) and three longer (3.09 Å) Sc–Sn bond lengths. Zr is bonded in a 4-coordinate geometry to four Ni and six Sn atoms. There are three shorter (2.66 Å) and one longer (2.68 Å) Zr–Ni bond lengths. There are three shorter (3.08 Å) and three longer (3.10 Å) Zr–Sn bond lengths. There are two inequivalent Ni sites. In the first Ni site, Ni is bonded in a body-centered cubic geometry to one Sc, three equivalent Zr, and four Sn atoms. There are one shorter (2.67 Å) and three longer (2.68 Å) Ni–Sn bond lengths. In the second Ni site, Ni is bonded in a body-centered cubic geometry to three equivalent Sc, one Zr, and four Sn atoms. There are three shorter (2.66 Å) and one longer (2.69 Å) Ni–Sn bond lengths. There are two inequivalent Sn sites. In the first Sn site, Sn is bonded in a distorted q6 geometry to three equivalent Sc, three equivalent Zr, and four Ni atoms. In the second Sn site, Sn is bonded in a distorted q6 geometry to three equivalent Sc, three equivalent Zr, and four Ni atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on ScTi(NiSn)2 by Materials Project

ScTi(NiSn)2 is half-Heusler-derived structured and crystallizes in the trigonal R3m space group. The structure is three-dimensional. Sc is bonded in a 4-coordinate geometry to four Ni and six Sn atoms. There are three shorter (2.64 Å) and one longer (2.67 Å) Sc–Ni bond lengths. There are three shorter (3.04 Å) and three longer (3.06 Å) Sc–Sn bond lengths. Ti is bonded in a 4-coordinate geometry to four Ni and six Sn atoms. All Ti–Ni bond lengths are 2.59 Å. There are three shorter (2.98 Å) and three longer (3.01 Å) Ti–Sn bond lengths. There are two inequivalent Ni sites. In the first Ni site, Ni is bonded in a body-centered cubic geometry to one Sc, three equivalent Ti, and four Sn atoms. There are one shorter (2.53 Å) and three longer (2.61 Å) Ni–Sn bond lengths. In the second Ni site, Ni is bonded in a body-centered cubic geometry to three equivalent Sc, one Ti, and four Sn atoms. There are three shorter (2.60 Å) and one longer (2.76 Å) Ni–Sn bond lengths. There are two inequivalent Sn sites. In the first Sn site, Sn is bonded in a 10-coordinate geometry to three equivalent Sc, three equivalent Ti, and four Ni atoms. In the second Sn site, Sn is bonded in a distorted q6 geometry to three equivalent Sc, three equivalent Ti, and four Ni atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Zr4Sc(NiSn)5 by Materials Project

ScZr4(NiSn)5 is half-Heusler-derived structured and crystallizes in the trigonal R3m space group. The structure is three-dimensional. Sc is bonded in a 4-coordinate geometry to four Ni and six Sn atoms. There are one shorter (2.68 Å) and three longer (2.70 Å) Sc–Ni bond lengths. There are three shorter (3.08 Å) and three longer (3.10 Å) Sc–Sn bond lengths. There are four inequivalent Zr sites. In the first Zr site, Zr is bonded in a 4-coordinate geometry to four Ni and six Sn atoms. There are three shorter (2.67 Å) and one longer (2.70 Å) Zr–Ni bond lengths. There are three shorter (3.09 Å) and three longer (3.11 Å) Zr–Sn bond lengths. In the second Zr site, Zr is bonded in a 4-coordinate geometry to four Ni and six Sn atoms. There are three shorter (2.68 Å) and one longer (2.69 Å) Zr–Ni bond lengths. There are three shorter (3.09 Å) and three longer (3.10 Å) Zr–Sn bond lengths. In the third Zr site, Zr is bonded in a 4-coordinate geometry to four Ni and six Sn atoms. All Zr–Ni bond lengths are 2.68 Å. There are three shorter (3.09 Å) and three longer (3.10 Å) Zr–Sn bond lengths. In the fourth Zr site, Zr is bonded in a 4-coordinate geometry to four Ni and six Sn atoms. There are one shorter (2.66 Å) and three longer (2.68 Å) Zr–Ni bond lengths. There are three shorter (3.09 Å) and three longer (3.11 Å) Zr–Sn bond lengths. There are five inequivalent Ni sites. In the first Ni site, Ni is bonded in a body-centered cubic geometry to one Sc, three equivalent Zr, and four Sn atoms. There are one shorter (2.66 Å) and three longer (2.69 Å) Ni–Sn bond lengths. In the second Ni site, Ni is bonded in a body-centered cubic geometry to four Zr and four Sn atoms. All Ni–Sn bond lengths are 2.68 Å. In the third Ni site, Ni is bonded in a body-centered cubic geometry to four Zr and four Sn atoms. All Ni–Sn bond lengths are 2.68 Å. In the fourth Ni site, Ni is bonded in a body-centered cubic geometry to four Zr and four Sn atoms. There are three shorter (2.68 Å) and one longer (2.69 Å) Ni–Sn bond lengths. In the fifth Ni site, Ni is bonded in a body-centered cubic geometry to three equivalent Sc, one Zr, and four Sn atoms. There are three shorter (2.67 Å) and one longer (2.70 Å) Ni–Sn bond lengths. There are five inequivalent Sn sites. In the first Sn site, Sn is bonded in a distorted q6 geometry to three equivalent Sc, three equivalent Zr, and four Ni atoms. In the second Sn site, Sn is bonded in a distorted q6 geometry to six Zr and four Ni atoms. In the third Sn site, Sn is bonded in a distorted q6 geometry to six Zr and four Ni atoms. In the fourth Sn site, Sn is bonded in a distorted q6 geometry to three equivalent Sc, three equivalent Zr, and four Ni atoms. In the fifth Sn site, Sn is bonded in a distorted q6 geometry to six Zr and four Ni atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on ScNb(NiSn)2 by Materials Project

ScNb(NiSn)2 is half-Heusler-derived structured and crystallizes in the trigonal R3m space group. The structure is three-dimensional. Sc is bonded in a 4-coordinate geometry to four Ni and six Sn atoms. There are three shorter (2.65 Å) and one longer (2.73 Å) Sc–Ni bond lengths. There are three shorter (3.03 Å) and three longer (3.04 Å) Sc–Sn bond lengths. Nb is bonded to four Ni and six Sn atoms to form distorted face-sharing NbNi4Sn6 tetrahedra. There are one shorter (2.52 Å) and three longer (2.61 Å) Nb–Ni bond lengths. There are three shorter (3.01 Å) and three longer (3.05 Å) Nb–Sn bond lengths. There are two inequivalent Ni sites. In the first Ni site, Ni is bonded in a body-centered cubic geometry to one Sc, three equivalent Nb, and four Sn atoms. There are one shorter (2.55 Å) and three longer (2.65 Å) Ni–Sn bond lengths. In the second Ni site, Ni is bonded in a body-centered cubic geometry to three equivalent Sc, one Nb, and four Sn atoms. There are three shorter (2.60 Å) and one longer (2.72 Å) Ni–Sn bond lengths. There are two inequivalent Sn sites. In the first Sn site, Sn is bonded in a 10-coordinate geometry to three equivalent Sc, three equivalent Nb, and four Ni atoms. In the second Sn site, Sn is bonded in a 10-coordinate geometry to three equivalent Sc, three equivalent Nb, and four Ni atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ce10(NiSn)3 by Materials Project

Ce10(NiSn)3 crystallizes in the orthorhombic Fmm2 space group. The structure is three-dimensional. there are four inequivalent Ce sites. In the first Ce site, Ce is bonded in a 2-coordinate geometry to two Ni and three Sn atoms. There are one shorter (2.79 Å) and one longer (2.91 Å) Ce–Ni bond lengths. There are one shorter (3.22 Å) and two longer (3.31 Å) Ce–Sn bond lengths. In the second Ce site, Ce is bonded in a 4-coordinate geometry to two equivalent Ce, three Ni, and two equivalent Sn atoms. Both Ce–Ce bond lengths are 2.94 Å. There are two shorter (2.94 Å) and one longer (3.44 Å) Ce–Ni bond lengths. Both Ce–Sn bond lengths are 3.24 Å. In the third Ce site, Ce is bonded to two equivalent Ni and three Sn atoms to form a mixture of distorted corner and face-sharing CeNi2Sn3 trigonal bipyramids. Both Ce–Ni bond lengths are 2.80 Å. There are one shorter (3.15 Å) and two longer (3.28 Å) Ce–Sn bond lengths. In the fourth Ce site, Ce is bonded in a 1-coordinate geometry to two equivalent Ce, three Ni, and three Sn atoms. There are a spread of Ce–Ni bond distances ranging from 2.84–3.46 Å. There are two shorter (3.25 Å) and one longer (3.50 Å) Ce–Sn bond lengths. There are two inequivalent Ni sites. In the first Ni site, Ni is bonded in a 9-coordinate geometry to eight Ce and one Ni atom. The Ni–Ni bond length is 2.70 Å. In the second Ni site, Ni is bonded in a 6-coordinate geometry to eight Ce and one Sn atom. The Ni–Sn bond length is 2.74 Å. There are two inequivalent Sn sites. In the first Sn site, Sn is bonded in a 9-coordinate geometry to eight Ce and one Ni atom. In the second Sn site, Sn is bonded in a distorted q6 geometry to ten Ce atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2021

Magnetic and structural properties of Mn X NiSn ( X = Mn, Fe, Co)

Crystal structure and magnetic properties of Heusler alloys MnXNiSn (X = Mn, Fe, Co) are investigated using density functional theory and compared with experimental results. The parent alloy Mn 2 NiSn, which crystallizes in the inverse Heusler structure, is found to be ferrimagnetic, in agreement with previous experimental and theoretical work. The Fe and Co substitutions cause the alloys to assume a fairly well-ordered Y structure and enhance the magnetization substantially. We find that the strong nearest neighbour Mn-X exchange changes from antiferromagnetic (X = Mn) to ferromagnetic (X = Fe, Co), which explains and actually overestimates the experimental changes. A striking feature of the system is that Fe and Co have opposite effects on the Curie temperature T c : they reduce and enhance T c , respectively. We qualitatively explain this behaviour in terms of two-sublattice model based on the nearest-neighbour exchange.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on La(NiSn)2 by Materials Project

LaNi2Sn2 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. La is bonded in a 8-coordinate geometry to eight equivalent Ni and eight equivalent Sn atoms. All La–Ni bond lengths are 3.45 Å. All La–Sn bond lengths are 3.48 Å. Ni is bonded in a 4-coordinate geometry to four equivalent La and four equivalent Sn atoms. All Ni–Sn bond lengths are 2.53 Å. Sn is bonded in a 9-coordinate geometry to four equivalent La, four equivalent Ni, and one Sn atom. The Sn–Sn bond length is 2.90 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ce(NiSn)2 by Materials Project

CeNi2Sn2 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Ce is bonded in a 8-coordinate geometry to eight equivalent Ni and eight equivalent Sn atoms. All Ce–Ni bond lengths are 3.42 Å. All Ce–Sn bond lengths are 3.44 Å. Ni is bonded in a 4-coordinate geometry to four equivalent Ce and four equivalent Sn atoms. All Ni–Sn bond lengths are 2.51 Å. Sn is bonded in a 9-coordinate geometry to four equivalent Ce, four equivalent Ni, and one Sn atom. The Sn–Sn bond length is 2.83 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on La(NiSn)2 by Materials Project

LaNi2Sn2 crystallizes in the tetragonal P4/nmm space group. The structure is three-dimensional. La is bonded in a 12-coordinate geometry to eight Ni and eight Sn atoms. There are four shorter (3.34 Å) and four longer (3.44 Å) La–Ni bond lengths. There are four shorter (3.40 Å) and four longer (3.46 Å) La–Sn bond lengths. There are two inequivalent Ni sites. In the first Ni site, Ni is bonded in a 8-coordinate geometry to four equivalent La and four equivalent Sn atoms. All Ni–Sn bond lengths are 2.58 Å. In the second Ni site, Ni is bonded in a 9-coordinate geometry to four equivalent La and five Sn atoms. There are one shorter (2.54 Å) and four longer (2.60 Å) Ni–Sn bond lengths. There are two inequivalent Sn sites. In the first Sn site, Sn is bonded in a 12-coordinate geometry to four equivalent La and four equivalent Ni atoms. In the second Sn site, Sn is bonded in a 9-coordinate geometry to four equivalent La and five Ni atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on NiSn(PO4)2 by Materials Project

Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on NiSn(ClO)6 by Materials Project

NiO6SnCl6 crystallizes in the trigonal R-3 space group. The structure is zero-dimensional and consists of three NiO6 clusters and three SnCl6 clusters. In each NiO6 cluster, Ni is bonded in an octahedral geometry to six equivalent O atoms. All Ni–O bond lengths are 1.95 Å. O is bonded in a single-bond geometry to one Ni atom. In each SnCl6 cluster, Sn is bonded in an octahedral geometry to six equivalent Cl atoms. All Sn–Cl bond lengths are 2.47 Å. Cl is bonded in a single-bond geometry to one Sn atom.

36 MATERIALS SCIENCE↗