Critical behavior of quasi-two-dimensional semiconducting ferromagnet Cr2Ge2Te6

Critical behavior of quasi-two-dimensional semiconducting ferromagnet Cr2Ge2Te6 The critical properties of the single-crystalline semiconducting ferromagnet Cr2Ge2Te6 were investigated by bulk dc magnetization around the paramagnetic to ferromagnetic phase transition. Critical exponents β=0.200±0.003 with a critical temperature Tc=62.65±0.07 K and γ=1.28±0.03 with Tc=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 Tc=62.7 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 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. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review B American Physical Society (APS)

Critical behavior of quasi-two-dimensional semiconducting ferromagnet Cr2Ge2Te6

Preview Only

Critical behavior of quasi-two-dimensional semiconducting ferromagnet Cr2Ge2Te6

Abstract

The critical properties of the single-crystalline semiconducting ferromagnet Cr2Ge2Te6 were investigated by bulk dc magnetization around the paramagnetic to ferromagnetic phase transition. Critical exponents β=0.200±0.003 with a critical temperature Tc=62.65±0.07 K and γ=1.28±0.03 with Tc=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 Tc=62.7 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 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.
Loading next page...
 
/lp/aps_physical/critical-behavior-of-quasi-two-dimensional-semiconducting-ferromagnet-sOKAWHTblC
Publisher
American Physical Society (APS)
Copyright
Copyright © ©2017 American Physical Society
ISSN
1098-0121
eISSN
1550-235X
D.O.I.
10.1103/PhysRevB.96.054406
Publisher site
See Article on Publisher Site

Abstract

The critical properties of the single-crystalline semiconducting ferromagnet Cr2Ge2Te6 were investigated by bulk dc magnetization around the paramagnetic to ferromagnetic phase transition. Critical exponents β=0.200±0.003 with a critical temperature Tc=62.65±0.07 K and γ=1.28±0.03 with Tc=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 Tc=62.7 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 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.

Journal

Physical Review BAmerican Physical Society (APS)

Published: Aug 3, 2017

There are no references for this article.

Sorry, we don’t have permission to share this article on DeepDyve,
but here are related articles that you can start reading right now:

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create lists to
organize your research

Export lists, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off