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Title: Structure, chromium vacancies, and magnetism in a C r 12 - x T e 16 compound

Abstract

Binary Cr-Te compounds are known to exhibit various structures and interesting physical properties, which are very sensitive to Cr content and arrangement. We report the structure and physical properties of a compound Cr12-xTe16 with x similar to 2.65. Cr9.35Te16 crystallizes in the trigonal structure with the space group $$P\bar{3}m$$1 (No. 164), consisting of four different Cr sites (Cr1, Cr2, Cr3, Cr4) with an ordered Cr4 vacant layer. The electrical resistivity, magnetization, specific heat, and neutron diffraction measurements indicate that there is a ferromagnetic transition at TC1 similar to 160 K with the first-order nature, and an anomaly at TC2 similar to 67 K. At 5 K, the magnetic moments of Cr2 and Cr3 are aligned along the c axis with 2.78 μB/Cr. Detailed neutron diffraction refinement suggests that ordered magnetic moments on Cr1 (fully occupied) and Cr4 (partially occupied) are negligible. The different magnetic response stems from different valence states and different magnetic interactions between Cr2/Cr3 and Cr1/Cr4 as evidenced by the x-ray absorption fine-structure measurements. This creates a unique two-dimensional magnetic system with ordered moments confined in the Cr2/Cr3 layer.

Authors:
 [1]; ORCiD logo [2]; ORCiD logo [3];  [1];  [1];  [4];  [1]
  1. Louisiana State Univ., Baton Rouge, LA (United States)
  2. Louisiana State Univ., Baton Rouge, LA (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  4. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Louisiana State Univ., Baton Rouge, LA (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1606879
Alternate Identifier(s):
OSTI ID: 1608555; OSTI ID: 1678703
Grant/Contract Number:  
AC05-00OR22725; SC0012432; AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Materials
Additional Journal Information:
Journal Volume: 3; Journal Issue: 12; Journal ID: ISSN 2475-9953
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Composition; Electrical conductivity; Ferromagnetism; Magnetic susceptibility; Crystal growth; Neutron diffraction; X-ray absorption spectroscopy; X-ray diffraction; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Composition, Electrical conductivity, Ferromagnetism, Magnetic susceptibility, Crystal growth, Neutron diffraction, X-ray absorption spectroscopy, X-ray diffraction

Citation Formats

Cao, Guixin, Zhang, Qiang, Frontzek, Matthias D., Xie, Weiwei, Gong, Dongliang, Sterbinsky, George E., and Jin, Rongying. Structure, chromium vacancies, and magnetism in a Cr12-xTe16 compound. United States: N. p., 2019. Web. https://doi.org/10.1103/PhysRevMaterials.3.125001.
Cao, Guixin, Zhang, Qiang, Frontzek, Matthias D., Xie, Weiwei, Gong, Dongliang, Sterbinsky, George E., & Jin, Rongying. Structure, chromium vacancies, and magnetism in a Cr12-xTe16 compound. United States. https://doi.org/10.1103/PhysRevMaterials.3.125001
Cao, Guixin, Zhang, Qiang, Frontzek, Matthias D., Xie, Weiwei, Gong, Dongliang, Sterbinsky, George E., and Jin, Rongying. Mon . "Structure, chromium vacancies, and magnetism in a Cr12-xTe16 compound". United States. https://doi.org/10.1103/PhysRevMaterials.3.125001. https://www.osti.gov/servlets/purl/1606879.
@article{osti_1606879,
title = {Structure, chromium vacancies, and magnetism in a Cr12-xTe16 compound},
author = {Cao, Guixin and Zhang, Qiang and Frontzek, Matthias D. and Xie, Weiwei and Gong, Dongliang and Sterbinsky, George E. and Jin, Rongying},
abstractNote = {Binary Cr-Te compounds are known to exhibit various structures and interesting physical properties, which are very sensitive to Cr content and arrangement. We report the structure and physical properties of a compound Cr12-xTe16 with x similar to 2.65. Cr9.35Te16 crystallizes in the trigonal structure with the space group $P\bar{3}m$1 (No. 164), consisting of four different Cr sites (Cr1, Cr2, Cr3, Cr4) with an ordered Cr4 vacant layer. The electrical resistivity, magnetization, specific heat, and neutron diffraction measurements indicate that there is a ferromagnetic transition at TC1 similar to 160 K with the first-order nature, and an anomaly at TC2 similar to 67 K. At 5 K, the magnetic moments of Cr2 and Cr3 are aligned along the c axis with 2.78 μB/Cr. Detailed neutron diffraction refinement suggests that ordered magnetic moments on Cr1 (fully occupied) and Cr4 (partially occupied) are negligible. The different magnetic response stems from different valence states and different magnetic interactions between Cr2/Cr3 and Cr1/Cr4 as evidenced by the x-ray absorption fine-structure measurements. This creates a unique two-dimensional magnetic system with ordered moments confined in the Cr2/Cr3 layer.},
doi = {10.1103/PhysRevMaterials.3.125001},
journal = {Physical Review Materials},
number = 12,
volume = 3,
place = {United States},
year = {2019},
month = {12}
}

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