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Title: Critical behavior of quasi-two-dimensional semiconducting ferromagnet Cr 2 Ge 2 Te 6

Journal Article · · Physical Review B
 [1];  [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.

Some critical properties of the single-crystalline semiconducting ferromagnet Cr 2 Ge 2 Te 6 were investigated by bulk dc magnetization around the paramagnetic to ferromagnetic phase transition. Critical exponents β = 0.200 ± 0.003 with a critical temperature T c = 62.65 ± 0.07 K and γ = 1.28 ± 0.03 with T c = 62.75 ± 0.06 K are obtained by the Kouvel-Fisher method whereas δ = 7.96 ± 0.01 is obtained by a critical isotherm analysis at T c = 62.7 K. These critical exponents obey the Widom scaling relation δ = 1 + γ / β , indicating self-consistency of the obtained values. Furthermore, with these critical exponents the isotherm M ( H ) curves below and above the critical temperatures collapse into two independent universal branches, obeying the single scaling equation m = f ± ( h ) , where m and h are renormalized magnetization and field, respectively. The determined exponents match well with those calculated from the results of the renormalization group approach for a two-dimensional Ising system coupled with a long-range interaction between spins decaying as J ( r ) ≈ r - ( d + σ ) with σ = 1.52 .

Research Organization:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704
OSTI ID:
1412649
Alternate ID(s):
OSTI ID: 1373954
Report Number(s):
BNL-114365-2017-JA; PRBMDO; R&D Project: PM016; KC0201050; TRN: US1800316
Journal Information:
Physical Review B, Vol. 96, Issue 5; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 72 works
Citation information provided by
Web of Science

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Cited By (13)

Thickness-dependent magnetic order in CrI3 single crystals journal September 2019
Realization of an excellent two-dimensional Heisenberg ferromagnetic system: the synthesis, structure, and thermodynamic properties of piperazinediium tetrabromocuprate journal January 2019
Understanding CrGeTe 3 : an abnormal phase change material with inverse resistance and density contrast journal January 2019
Critical behavior of two-dimensional intrinsically ferromagnetic semiconductor CrI 3 journal February 2018
Magnetic and electronic properties of Cr 2 Ge 2 Te 6 monolayer by strain and electric-field engineering journal March 2019
Increased Curie temperature and enhanced perpendicular magneto anisotropy of Cr 2 Ge 2 Te 6 /NiO heterostructures journal December 2019
Anisotropic magnetoresistance behaviors in the layered ferromagnetic Cr 2 Ge 2 Te 6 journal October 2019
Ultrasensitive negative photoresponse in 2D Cr 2 Ge 2 Te 6 photodetector with light-induced carrier trapping journal September 2018
Electrically tunable exchange splitting in bilayer graphene on monolayer Cr 2 X 2 Te 6 with X = Ge, Si, and Sn journal July 2018
The dependence of fractal figures formed in irradiated germanium on temperature and composition journal December 2019
Magnetic anisotropy and spin-polarized two-dimensional electron gas in the van der Waals ferromagnet Cr 2 Ge 2 Te 6 journal April 2019
Thickness-dependent magnetic order in CrI$_3$ single crystals text January 2019
Increased Curie temperature and enhanced perpendicular magneto anisotropy of Cr2Ge2Te6/NiO heterostructure text January 2019

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