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Evolution of magnetic bubble domains in the uniaxial ferromaget CeRu 2 Ga 2 B inferred from the Hall effect and ac magnetic susceptibility

Siegfried, Peter E. [Univ. of Colorado, Boulder, CO (United States)] (ORCID:0000000201452899)·Maus, Mark [Univ. of Colorado, Boulder, CO (United States)]·Bornstein, Alexander C. [Univ. of Colorado, Boulder, CO (United States)]·Wulferding, Dirk [Sejong Univ., Seoul (Korea, Republic of)]·Kim, Jeehoon [Pohang Univ. of Science and Technology (POSTECH) (Korea, Republic of)]·Baumbach, Ryan E. [Univ. of California, Santa Cruz, CA (United States)]·Bauer, Eric D. [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)]·Ronning, Filip [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)]·Lee, Minhyea [Univ. of Colorado, Boulder, CO (United States)] (ORCID:0000000285598544)
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Abstract

We study the Hall effect, AC magnetic susceptibility (χ ac ), and magnetic force microscopy of the uniaxial ferromagnet CeRu 2 Ga 2 B with a centrosymmetric crystal structure. We observe a finite topological Hall effect (THE) within the ordered phase, before the magnetization is polarized by applied field. By comparing the field dependences of the area fraction of the magnetic bubbles, the derivative of χ ac , and the THE signal, we deduce that the magnetic bubbles in CeRu 2 Ga 2 B evolve from the trivial to topological spin texture with field. Our findings enable the expansion of the search for magnetic materials hosting topological spin textures to include uniaxial ferromagnets and open a new possibility to tailor the topological spin texture.

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AC magnetic susceptibilitymagnetic bubble domainmagnetic force microscopymagnetizationnon trivial spin texturetopological Hall effect

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Siegfried, Peter E. [Univ. of Colorado, Boulder, CO (United States)] (ORCID:0000000201452899), Maus, Mark [Univ. of Colorado, Boulder, CO (United States)], Bornstein, Alexander C. [Univ. of Colorado, Boulder, CO (United States)], Wulferding, Dirk [Sejong Univ., Seoul (Korea, Republic of)], Kim, Jeehoon [Pohang Univ. of Science and Technology (POSTECH) (Korea, Republic of)], Baumbach, Ryan E. [Univ. of California, Santa Cruz, CA (United States)], Bauer, Eric D. [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)], Ronning, Filip [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)], Lee, Minhyea [Univ. of Colorado, Boulder, CO (United States)] (ORCID:0000000285598544). 2026-01-02. Evolution of magnetic bubble domains in the uniaxial ferromaget CeRu 2 Ga 2 B inferred from the Hall effect and ac magnetic susceptibility. https://doi.org/10.1088/1361-648x/ae2bd4

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