Magnetocrystalline anisotropy in UMn2Ge2 and related Mn-based actinide ferromagnets

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

doi:10.1103/PhysRevB.91.174401

Magnetocrystalline anisotropy in UMn2Ge2 and related Mn-based actinide ferromagnets

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

Materials Theory

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

We present magnetization isotherms in pulsed magnetic fields up to 62 T, supported by first-principles calculations, demonstrating a huge uniaxial magnetocrystalline anisotropy energy - approximately 20 MJ/m3 - in UMn2Ge2. This large anisotropy results from the extremely strong spin-orbit coupling affecting the uranium 5f electrons, which in the calculations exhibit a substantial orbital moment exceeding 2μB. We also find from theoretical calculations that a number of isostructural Mn actinide compounds are expected to have similarly large anisotropy.

Original language	English
Article number	174401
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	91
Issue number	17
DOIs	https://doi.org/10.1103/PhysRevB.91.174401
State	Published - May 4 2015

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title = "Magnetocrystalline anisotropy in UMn2Ge2 and related Mn-based actinide ferromagnets",

abstract = "We present magnetization isotherms in pulsed magnetic fields up to 62 T, supported by first-principles calculations, demonstrating a huge uniaxial magnetocrystalline anisotropy energy - approximately 20 MJ/m3 - in UMn2Ge2. This large anisotropy results from the extremely strong spin-orbit coupling affecting the uranium 5f electrons, which in the calculations exhibit a substantial orbital moment exceeding 2μB. 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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AU - Parker, David S.

AU - Ghimire, Nirmal

AU - Singleton, John

AU - Thompson, J. D.

AU - Bauer, Eric D.

AU - Baumbach, Ryan

AU - Mandrus, David

AU - Li, Ling

AU - Singh, David J.

PY - 2015/5/4

Y1 - 2015/5/4

N2 - We present magnetization isotherms in pulsed magnetic fields up to 62 T, supported by first-principles calculations, demonstrating a huge uniaxial magnetocrystalline anisotropy energy - approximately 20 MJ/m3 - in UMn2Ge2. This large anisotropy results from the extremely strong spin-orbit coupling affecting the uranium 5f electrons, which in the calculations exhibit a substantial orbital moment exceeding 2μB. We also find from theoretical calculations that a number of isostructural Mn actinide compounds are expected to have similarly large anisotropy.

AB - We present magnetization isotherms in pulsed magnetic fields up to 62 T, supported by first-principles calculations, demonstrating a huge uniaxial magnetocrystalline anisotropy energy - approximately 20 MJ/m3 - in UMn2Ge2. This large anisotropy results from the extremely strong spin-orbit coupling affecting the uranium 5f electrons, which in the calculations exhibit a substantial orbital moment exceeding 2μB. 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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DO - 10.1103/PhysRevB.91.174401

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JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 17

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ER -

Magnetocrystalline anisotropy in UMn2Ge2 and related Mn-based actinide ferromagnets

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