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Role of the orbital moment in a series of isostructural weak ferromagnets

DOI: 10.1103/PhysRevB.98.104424 DOI Help

Authors: D. Pincini (University College London; Diamond Light Source) , Federica Fabrizi (Diamond Light Source) , G. Beutier (Université Grenoble Alpes, CNRS) , G. Nisbet (Diamond Light Source) , H. Elnaggar (Utrecht University) , V. E. Dmitrienko (A.V. Shubnikov Institute of Crystallography) , M. I. Katsnelson (Radboud University Nijmegen; Ural Federal University) , Y. O. Kvashnin (Uppsala University) , A. I. Lichtenstein (Universitt Hamburg; Ural Federal University) , V. V. Mazurenko (Ural Federal University) , E. N. Ovchinnikova (M.V.Lomonosov Moscow State University) , O. V. Dimitrova (M.V.Lomonosov Moscow State University) , S. P. Collins (Diamond Light Source)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review B , VOL 98

State: Published (Approved)
Published: September 2018
Diamond Proposal Number(s): 12479 , 13608 , 16227 , 12478 , 15987

Open Access Open Access

Abstract: The orbital contribution to the magnetic moment of the transition-metal ion in the isostructural weak ferromagnets ACO3 (A= Mn,Co,Ni) and FeBO3 was investigated by a combination of first-principles calculations, nonresonant x-ray magnetic scattering, and x-ray magnetic circular dichroism. A nontrivial evolution of the orbital moment as a function of the 3d orbitals filling is revealed, with a particularly large value found in the Co member of the family. Here, the coupling between magnetic and lattice degrees of freedom produced by the spin-orbit interaction results in a large single-ion anisotropy and a peculiar magnetic-moment-induced electron cloud distortion, evidenced by the appearance of a subtle scattering amplitude at space-group-forbidden reflections and significant magnetostrictive effects. Our results, which complement a previous investigation on the sign of the Dzyaloshinskii-Moriya interaction across the series, highlight the importance of spin-orbit coupling in the physics of weak ferromagnets and prove the ability of modern first-principles calculations to predict the properties of materials where the Dzyaloshinskii-Moriya interaction is a fundamental ingredient of the magnetic Hamiltonian.

Journal Keywords: Antiferromagnetism; Dzyaloshinskii-Moriya interaction; Magnetic anisotropy; Magnetic interactions; Magnetoelastic effect; Spin-orbit coupling; Spintronics; Antiferromagnets; Crystalline systems; All-electron density functional calculations; Magnetization

Subject Areas: Materials, Physics


Instruments: I10-Beamline for Advanced Dichroism , I16-Materials and Magnetism

Other Facilities: ESRF

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PhysRe34565vB.98.pdf