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Title: Charge transfer-tuned magnetism in Nd-substituted Gd 5Si 4

Abstract

We report a charge-transfer mechanism in tuning of magnetism of Nd-substituted Gd 5-xNd xSi 4 (x = 1 and 2.5) compounds. The X-ray absorption near edge structure measurements demonstrated that Nd substitutions for Gd induce charge transfer of 5 d 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 5 d–3 p hybridization significantly. It is suggested that the charge transfer of 5d electrons may occur in other rare earth-substituted Gd 5Si 4 compounds allowing for tuning of their magnetism.

Authors:
 [1]; ORCiD logo [2];  [3]; ORCiD logo [4];  [5]; ORCiD logo [3];  [3];  [3]
  1. Northeastern Univ., Shenyang (China); Argonne National Lab. (ANL), Lemont, IL (United States)
  2. Northeastern Univ., Shenyang (China)
  3. Argonne National Lab. (ANL), Lemont, IL (United States)
  4. Uppsala Univ., Uppsala (Sweden)
  5. Univ. Paris–Saclay, Palaiseau (France)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC); National Basic Research Program of China; China Scholarship Council
OSTI Identifier:
1505614
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
AIP Advances
Additional Journal Information:
Journal Volume: 8; Journal Issue: 12; Journal ID: ISSN 2158-3226
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Kou, R. H., Gao, J., Ren, Y., Sanyal, B., Bhandary, S., Heald, S. M., Fisher, B., and Sun, C. -J. Charge transfer-tuned magnetism in Nd-substituted Gd5Si4. United States: N. p., 2018. Web. doi:10.1063/1.5081457.
Kou, R. H., Gao, J., Ren, Y., Sanyal, B., Bhandary, S., Heald, S. M., Fisher, B., & Sun, C. -J. Charge transfer-tuned magnetism in Nd-substituted Gd5Si4. United States. doi:10.1063/1.5081457.
Kou, R. H., Gao, J., Ren, Y., Sanyal, B., Bhandary, S., Heald, S. M., Fisher, B., and Sun, C. -J. Fri . "Charge transfer-tuned magnetism in Nd-substituted Gd5Si4". United States. doi:10.1063/1.5081457. https://www.osti.gov/servlets/purl/1505614.
@article{osti_1505614,
title = {Charge transfer-tuned magnetism in Nd-substituted Gd5Si4},
author = {Kou, R. H. and Gao, J. and Ren, Y. and Sanyal, B. and Bhandary, S. and Heald, S. M. and Fisher, B. and Sun, C. -J.},
abstractNote = {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.},
doi = {10.1063/1.5081457},
journal = {AIP Advances},
number = 12,
volume = 8,
place = {United States},
year = {2018},
month = {12}
}

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