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Title: Anisotropic magnetic entropy change in Cr 2 X 2 Te 6 ( X = Si and Ge )

Abstract

Intrinsic, two-dimensional (2D) ferromagnetic semiconductors are an important class of materials for spintronics applications. Cr 2X 2Te 6 ( X = Si and Ge ) semiconductors show 2D Ising-like ferromagnetism, which is preserved in few-layer devices. The maximum magnetic entropy change associated with the critical properties around the ferromagnetic transition for Cr 2Si 2Te 6 - ΔS$$max\atop{M}$$ ~ 5.05 J kg -1 K -1 is much larger than - ΔS$$max\atop{M}$$ ~ 2.64 J kg -1 K -1 for Cr 2Ge 2Te 6 with an out-of-plane field change of 5 T. The rescaled - ΔS M (T,H) curves collapse onto a universal curve independent of temperature and field for both materials. Here, this indicates similar critical behavior and 2D Ising magnetism, confirming the magnetocrystalline anisotropy that could preserve the long-range ferromagnetism in a few layers of Cr 2X 2Te 6 .

Authors:
ORCiD logo [1];  [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1492783
Alternate Identifier(s):
OSTI ID: 1490139
Report Number(s):
BNL-210942-2019-JAAM
Journal ID: ISSN 2475-9953; PRMHAR
Grant/Contract Number:  
SC0012704
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review Materials
Additional Journal Information:
Journal Volume: 3; Journal Issue: 1; Journal ID: ISSN 2475-9953
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Liu, Yu, and Petrovic, C. Anisotropic magnetic entropy change in Cr2X2Te6(X=Siand Ge). United States: N. p., 2019. Web. doi:10.1103/PhysRevMaterials.3.014001.
Liu, Yu, & Petrovic, C. Anisotropic magnetic entropy change in Cr2X2Te6(X=Siand Ge). United States. doi:10.1103/PhysRevMaterials.3.014001.
Liu, Yu, and Petrovic, C. Wed . "Anisotropic magnetic entropy change in Cr2X2Te6(X=Siand Ge)". United States. doi:10.1103/PhysRevMaterials.3.014001. https://www.osti.gov/servlets/purl/1492783.
@article{osti_1492783,
title = {Anisotropic magnetic entropy change in Cr2X2Te6(X=Siand Ge)},
author = {Liu, Yu and Petrovic, C.},
abstractNote = {Intrinsic, two-dimensional (2D) ferromagnetic semiconductors are an important class of materials for spintronics applications. Cr2X2Te6 ( X = Si and Ge ) semiconductors show 2D Ising-like ferromagnetism, which is preserved in few-layer devices. The maximum magnetic entropy change associated with the critical properties around the ferromagnetic transition for Cr2Si2Te6 - ΔS$max\atop{M}$ ~ 5.05 J kg-1 K-1 is much larger than - ΔS$max\atop{M}$ ~ 2.64 J kg-1 K-1 for Cr2Ge2Te6 with an out-of-plane field change of 5 T. The rescaled - ΔSM (T,H) curves collapse onto a universal curve independent of temperature and field for both materials. Here, this indicates similar critical behavior and 2D Ising magnetism, confirming the magnetocrystalline anisotropy that could preserve the long-range ferromagnetism in a few layers of Cr2X2Te6 .},
doi = {10.1103/PhysRevMaterials.3.014001},
journal = {Physical Review Materials},
issn = {2475-9953},
number = 1,
volume = 3,
place = {United States},
year = {2019},
month = {1}
}

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Cited by: 13 works
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