High-Curie-Temperature Ferromagnetism in (Sc,Fe)F3 Fluorides and its Dependence on Chemical Valence

Lei Hu; Jun Chen; Longlong Fan; Yang Ren; Qingzhen Huang; Andrea Sanson; Zheng Jiang; Mei Zhou; Yangchun Rong; Yong Wang; Jinxia Deng; Xianran Xing

doi:10.1002/adma.201500868

High-Curie-Temperature Ferromagnetism in (Sc,Fe)F3 Fluorides and its Dependence on Chemical Valence

Adv Mater. 2015 Aug 19;27(31):4592-6. doi: 10.1002/adma.201500868. Epub 2015 Jul 6.

Authors

Lei Hu¹, Jun Chen^{1

2}, Longlong Fan¹, Yang Ren³, Qingzhen Huang⁴, Andrea Sanson⁵, Zheng Jiang⁶, Mei Zhou⁷, Yangchun Rong¹, Yong Wang⁶, Jinxia Deng¹, Xianran Xing¹

Affiliations

¹ Department of Physical Chemistry, University of Science and Technology Beijing, Beijing, 100083, China.
² Beijing Key Laboratory of Special Melting and Preparation of High-End Metal Materials, University of Science and Technology Beijing, Beijing, 100083, China.
³ Argonne National Laboratory, X-Ray Science Division, Argonne, IL, 60439, USA.
⁴ NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD, 20899-6102, USA.
⁵ Department of Physics and Astronomy, University of Padova, Padova, I-35131, Italy.
⁶ Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China.
⁷ Physics Department, Tsinghua University, Beijing, 100084, China.

PMID: 26149472
DOI: 10.1002/adma.201500868

Abstract

A magnetic metal-fluoride system is shown for the first time to have a high Curie temperature (≈545 K). The magnetism correlates intimately with the Fe(2+)/Fe(3+) ratio. As the ratio increases, the weak magnetism displayed by unordered magnetic moments intensifies, and these magnetic moments align in parallel. Simultaneously, a magneto-volume effect is also shown to increase the lattice volume.

Keywords: fluorides; magnetic materials; multifunctional materials; spintronics; structure-property relationships.