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journal article·2018-12-01Open access

Charge transfer-tuned magnetism in Nd-substituted Gd5Si4

R. H. Kou, J. Gao, Y. Ren, B. Sanyal, S. Bhandary, S. M. Heald, B. Fisher, C.-J. Sun

AIP Advances· Volume 8· Issue 12
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Source abstract

Abstract

We report a charge-transfer mechanism in tuning of magnetism of Nd-substituted Gd5-xNdxSi4 (x=1 and 2.5) compounds. The X-ray absorption near edge structure measurements demonstrated that Nd substitutions for Gd induce charge transfer of 5d electrons from Gd to Nd. The charge transfer weakens spin-orbital coupling of Gd but strengthens that of Nd. Consequently, the magnetization responses of the substituted compounds to low magnetic fields are increased while their saturation magnetization is reduced. Electronic structure calculations showed that the charge transfer stabilizes a ferromagnetic and a ferrimagnetic structure in the compounds with x = 1 and 2.5, respectively, but that it does not change the 5d–3p hybridization significantly. It is suggested that the charge transfer of 5d electrons may occur in other rare earth-substituted Gd5Si4 compounds allowing for tuning of their magnetism.
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Research context

OpenAlex topics: Magnetic and transport properties of perovskites and related materials · Rare-earth and actinide compounds · Magnetic Properties of Alloys

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Key Laboratory of Electromagnetic Processing of Materials (Ministry of Education), Northeastern University 1 , Shenyang 110819, China

Advanced Photon Source, Argonne National Laboratory 2 , Lemont, Illinois 60439, USA

Department of Physics and Astronomy, Uppsala University 3 , 751 20 Uppsala, Sweden

CPHT, Ecole Polytechnique, CNRS, Université Paris–Saclay, Route de Saclay 4 , 91128 Palaiseau, France

Center for Nanoscale Materials, Argonne National Laboratory 5 , Lemont, Illinois 60439, USA

Funding

National Natural Science Foundation of China · China Scholarship Council · U.S. Department of Energy · Ministry of Science and Technology of the People's Republic of China

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