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All sourcesNASA NTRSDOE OSTI
NASA NTRS1976

Magnetization and magnetic susceptibilities of GdH3, HoH3, ErH3 and YbH3

The magnetic susceptibility of powdered samples of HoH3, ErH3, GdH3 and YbH3 have been measured in the temperature range from 4.2 to 1.2 K. Two broad, local maxima are observed in the variation of chi versus T for GdH3, with maxima in (delta chi delta T) versus T at 1.8 K and 3.3 K. The inverse susceptibilities for HoH3 and ErH3 both obey a Curies-Weiss law over a limited range (4.2 to 2.6K and 4.2 to 2 K respectively) with values for the Weiss constant of -4.25 K and -1.11 K, and effective moments of 8.6 and 7.7 Bohr magnetons respectively. The susceptibility of YbH3 is independent of temperature over the range investigated. High-field magnetization measurements yield extrapolated saturation moments of 7.0 + or - 0.25 Bohr magnetons/ion for GdH3, 6.1 + or - 0.2 Bohr magnetons/ion for HoH3 and 3.74 + or - 0.11 Bohr magnetons/ion for ErH3. In addition, ErH3 exhibits a van Vleck paramagnetism in the high field region.

Flood, D. J.↗
DOE OSTI2020

Materials Data on YbH3 by Materials Project

YbH3 is alpha bismuth trifluoride structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Yb3+ is bonded in a distorted body-centered cubic geometry to fourteen H1- atoms. There are eight shorter (2.26 Å) and six longer (2.60 Å) Yb–H bond lengths. There are two inequivalent H1- sites. In the first H1- site, H1- is bonded to four equivalent Yb3+ atoms to form HYb4 tetrahedra that share corners with twelve equivalent HYb6 octahedra, corners with sixteen equivalent HYb4 tetrahedra, edges with six equivalent HYb4 tetrahedra, and faces with four equivalent HYb6 octahedra. The corner-sharing octahedral tilt angles are 55°. In the second H1- site, H1- is bonded to six equivalent Yb3+ atoms to form HYb6 octahedra that share corners with six equivalent HYb6 octahedra, corners with twenty-four equivalent HYb4 tetrahedra, edges with twelve equivalent HYb6 octahedra, and faces with eight equivalent HYb4 tetrahedra. The corner-sharing octahedral tilt angles are 0°.

36 MATERIALS SCIENCE↗