Magnetic anisotropy driven by ligand in 4d transition-metal oxide SrRuO3
Source abstract
Abstract
The origin of magnetic anisotropy in magnetic compounds is a longstanding issue in materials science, and nonmagnetic ligand ions are considered to contribute little to magnetic anisotropy. Here, we introduce the concept of ligand-driven magnetic anisotropy in a complex transition-metal oxide. We conducted x-ray magnetic circular dichroism spectroscopies at the Ru and O edges in the 4d ferromagnetic metal SrRuO3. Systematic variation of the sample thickness in the range of ≤10 nm allowed us to control the localization of Ru 4d t2g states, which affects the magnetic coupling between the Ru and O ions. We observe that the orbital magnetic moment of the ligand O 2p orbitals induced through the charge transfer to the Ru 4d t2g states becomes anisotropic first, and the anisotropic magnetic moment of Ru and, therefore, the entire system is induced via magnetic coupling between Ru 4d and O 2p orbitals.
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Research context
OpenAlex topics: Advanced Condensed Matter Physics · Magnetic and transport properties of perovskites and related materials · Multiferroics and related materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
NTT Basic Research Laboratories, NTT Corporation 1 , Atsugi, Kanagawa 243-0198, Japan
Center for Spintronics Research Network, The University of Tokyo 2 , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
Department of Electrical Engineering and Information Systems, The University of Tokyo 3 , Bunkyo, Tokyo 113-8656, Japan
Japan Synchrotron Radiation Research Institute (JASRI) 4 , 1-1-1 Kouto, Sayo, Hyogo 679-5198, Japan
Laboratory of Advanced Science and Technology for Industry, University of Hyogo 5 , Kamigori, Hyogo 678-1205, Japan
NanoTerasu Center, National Institutes for Quantum Science and Technology (QST) 6 , Sendai 980-8579, Japan
Funding
Japan Science and Technology Agency
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