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Title: Critical behavior of the van der Waals bonded ferromagnet Fe 3 - x GeTe 2

Abstract

The critical properties of the single-crystalline van der Waals bonded ferromagnet Fe 3-xGeTe 2 were investigated by bulk dc magnetization around the paramagnetic to ferromagnetic (FM) phase transition. The Fe 3-xGeTe 2 single crystals grown by self-flux method with Fe deficiency x ≈ 0.36 exhibit bulk FM ordering below T c = 152 K. The Mössbauer spectroscopy was used to provide information on defects and local atomic environment in such crystals. Critical exponents β = 0.372(4) with a critical temperature T c= 151.25(5) K and γ = 1.265(15) with T c = 151.17(12) K are obtained by the Kouvel-Fisher method, whereas δ = 4.50 ( 1 ) is obtained by a critical isotherm analysis at T c = 151 K. These critical exponents obey the Widom scaling relation δ = 1 + γ / β , indicating self-consistency of the obtained values. 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 exponents determined in this study are close to those calculated from the results of the renormalization group approach formore » a heuristic model of three-dimensional Heisenberg (d = 3,n = 3) spins coupled with the attractive long-range interactions between spins that decay as J(r) ≈ r -(3+σ) with σ = 1.89.« less

Authors:
 [1];  [2];  [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. Univ. of Belgrade (Serbia)
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1425051
Alternate Identifier(s):
OSTI ID: 1404741
Report Number(s):
BNL-114855-2017-JAAM
Journal ID: ISSN 2469-9950; PRBMDO; TRN: US1802017
Grant/Contract Number:  
SC0012704
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 96; Journal Issue: 14; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Liu, Yu, Ivanovski, V. N., and Petrovic, C. Critical behavior of the van der Waals bonded ferromagnet Fe3-xGeTe2. United States: N. p., 2017. Web. doi:10.1103/PhysRevB.96.144429.
Liu, Yu, Ivanovski, V. N., & Petrovic, C. Critical behavior of the van der Waals bonded ferromagnet Fe3-xGeTe2. United States. doi:10.1103/PhysRevB.96.144429.
Liu, Yu, Ivanovski, V. N., and Petrovic, C. Sun . "Critical behavior of the van der Waals bonded ferromagnet Fe3-xGeTe2". United States. doi:10.1103/PhysRevB.96.144429.
@article{osti_1425051,
title = {Critical behavior of the van der Waals bonded ferromagnet Fe3-xGeTe2},
author = {Liu, Yu and Ivanovski, V. N. and Petrovic, C.},
abstractNote = {The critical properties of the single-crystalline van der Waals bonded ferromagnet Fe3-xGeTe2 were investigated by bulk dc magnetization around the paramagnetic to ferromagnetic (FM) phase transition. The Fe3-xGeTe2 single crystals grown by self-flux method with Fe deficiency x ≈ 0.36 exhibit bulk FM ordering below Tc = 152 K. The Mössbauer spectroscopy was used to provide information on defects and local atomic environment in such crystals. Critical exponents β = 0.372(4) with a critical temperature Tc= 151.25(5) K and γ = 1.265(15) with Tc = 151.17(12) K are obtained by the Kouvel-Fisher method, whereas δ = 4.50 ( 1 ) is obtained by a critical isotherm analysis at Tc = 151 K. These critical exponents obey the Widom scaling relation δ = 1 + γ / β , indicating self-consistency of the obtained values. 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 exponents determined in this study are close to those calculated from the results of the renormalization group approach for a heuristic model of three-dimensional Heisenberg (d = 3,n = 3) spins coupled with the attractive long-range interactions between spins that decay as J(r) ≈ r-(3+σ) with σ = 1.89.},
doi = {10.1103/PhysRevB.96.144429},
journal = {Physical Review B},
number = 14,
volume = 96,
place = {United States},
year = {Sun Oct 29 00:00:00 EDT 2017},
month = {Sun Oct 29 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
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Cited by: 5 works
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