Anisotropic magnetic entropy change in Cr2X2Te6(X=Siand Ge)

Liu, Yu; Petrovic, C.

doi:10.1103/PhysRevMaterials.3.014001

Anisotropic magnetic entropy change in ${Cr}_{2} X_{2} {Te}_{6} (X = Si and Ge)$

Journal Article · Tue Jan 08 23:00:00 EST 2019 · Physical Review Materials

DOI:https://doi.org/10.1103/PhysRevMaterials.3.014001· OSTI ID:1492783

^[1]; Petrovic, C. ^[1]

Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.

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 - 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 Cr₂X₂Te₆ .

View Accepted Manuscript (DOE)

Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: SC0012704

OSTI ID:: 1492783

Alternate ID(s):: OSTI ID: 1490139

Report Number(s):: BNL-210942-2019-JAAM

Journal Information:: Physical Review Materials, Journal Name: Physical Review Materials Journal Issue: 1 Vol. 3; ISSN PRMHAR; ISSN 2475-9953

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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