Magnetocrystalline anisotropy in UMn2Ge2 and related Mn-based actinide ferromagnets

Parker, David S.; Ghimire, Nirmal; Singleton, John; Thompson, J. D.; Bauer, Eric D.; Baumbach, Ryan; Mandrus, David; Li, Ling; Singh, David J.

doi:10.1103/PhysRevB.91.174401

Title: Magnetocrystalline anisotropy in ${UMn}_{2} {Ge}_{2}$ and related Mn-based actinide ferromagnets

Journal Article · Mon May 04 00:00:00 EDT 2015 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.91.174401· OSTI ID:1185907

Parker, David S. ^[1]; Ghimire, Nirmal ^[2]; Singleton, John ^[2]; Thompson, J. D. ^[2]; Bauer, Eric D. ^[2]; Baumbach, Ryan ^[3]; Mandrus, David ^[4]; Li, Ling ^[5]; Singh, David J. ^[1]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab)
Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Science and Engineering; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Science and Engineering

We present magnetization isotherms in pulsed magnetic fields up to 62 Tesla, supported by first principles calculations, demonstrating a huge uniaxial magnetocrystalline anisotropy energy - approximately 20 MJ/m³ - in ${UMn}_{2} {Ge}_{2}$ . This large anisotropy results from the extremely strong spin-orbit coupling affecting the uranium 5 f electrons, which in the calculations exhibit a substantial orbital moment exceeding 2 μ_B. Finally, we also find from theoretical calculations that a number of isostructural Mn-actinide compounds are expected to have similarly large anisotropy.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE); USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC05-00OR22725; DMR-1410428

OSTI ID:: 1185907

Alternate ID(s):: OSTI ID: 1179695

Journal Information:: Physical Review. B, Condensed Matter and Materials Physics, Vol. 91, Issue 17; ISSN 1098-0121

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 9 works

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Competing magnetic ground states and their coupling to the crystal lattice in CuFe2Ge2 May, Andrew F.; Calder, Stuart; Parker, David S. Scientific Reports, Vol. 6, Issue 1 https://doi.org/10.1038/srep35325	journal	October 2016

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Title: Magnetocrystalline anisotropy in ${UMn}_{2} {Ge}_{2}$ and related Mn-based actinide ferromagnets