Evidence of three-dimensional Ising ferromagnetism in the A-site-ordered perovskite CaCu3Ge4O12

J. G. Cheng; J. S. Zhou; J. B. Goodenough; Y. T. Su; Y. Sui

doi:10.1103/PhysRevB.83.212403

Evidence of three-dimensional Ising ferromagnetism in the A-site-ordered perovskite CaCu₃Ge₄O₁₂

J. G. Cheng^*
, J. S. Zhou
, J. B. Goodenough
, Y. T. Su
, Y. Sui

^*Corresponding author for this work

School of Physics

University of Texas at Austin
Harbin Institute of Technology

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

The A-site-ordered perovskite CaCu₃Ge₄O₁₂ synthesized under high pressure undergoes ferromagnetic spin ordering below T_c 12 K. The critical exponents have been determined from isotherms of magnetization across T_c via an iteration process and the Kouvel-Fisher method as well as from specific heat. Based on fitting parameters of T_c, β, and γ, the magnetization data in the vicinity of T_c can be scaled onto two universal curves in the plot of M/||β vs H/||β⁺γ, where= T/T_c-1. Critical exponents α, β, and γ obtained indicate that CaCu₃Ge ₄O₁₂ is a three-dimensional coupled Ising ferromagnet with a small coercivity.

Original language	English
Article number	212403
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	83
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevB.83.212403
State	Published - 23 Jun 2011

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title = "Evidence of three-dimensional Ising ferromagnetism in the A-site-ordered perovskite CaCu3Ge4O12",

abstract = "The A-site-ordered perovskite CaCu3Ge4O12 synthesized under high pressure undergoes ferromagnetic spin ordering below Tc 12 K. The critical exponents have been determined from isotherms of magnetization across Tc via an iteration process and the Kouvel-Fisher method as well as from specific heat. Based on fitting parameters of Tc, β, and γ, the magnetization data in the vicinity of Tc can be scaled onto two universal curves in the plot of M/||β vs H/||β+γ, where= T/Tc-1. Critical exponents α, β, and γ obtained indicate that CaCu3Ge 4O12 is a three-dimensional coupled Ising ferromagnet with a small coercivity.",

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year = "2011",

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doi = "10.1103/PhysRevB.83.212403",

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T1 - Evidence of three-dimensional Ising ferromagnetism in the A-site-ordered perovskite CaCu3Ge4O12

AU - Cheng, J. G.

AU - Zhou, J. S.

AU - Goodenough, J. B.

AU - Su, Y. T.

AU - Sui, Y.

PY - 2011/6/23

Y1 - 2011/6/23

N2 - The A-site-ordered perovskite CaCu3Ge4O12 synthesized under high pressure undergoes ferromagnetic spin ordering below Tc 12 K. The critical exponents have been determined from isotherms of magnetization across Tc via an iteration process and the Kouvel-Fisher method as well as from specific heat. Based on fitting parameters of Tc, β, and γ, the magnetization data in the vicinity of Tc can be scaled onto two universal curves in the plot of M/||β vs H/||β+γ, where= T/Tc-1. Critical exponents α, β, and γ obtained indicate that CaCu3Ge 4O12 is a three-dimensional coupled Ising ferromagnet with a small coercivity.

AB - The A-site-ordered perovskite CaCu3Ge4O12 synthesized under high pressure undergoes ferromagnetic spin ordering below Tc 12 K. The critical exponents have been determined from isotherms of magnetization across Tc via an iteration process and the Kouvel-Fisher method as well as from specific heat. Based on fitting parameters of Tc, β, and γ, the magnetization data in the vicinity of Tc can be scaled onto two universal curves in the plot of M/||β vs H/||β+γ, where= T/Tc-1. Critical exponents α, β, and γ obtained indicate that CaCu3Ge 4O12 is a three-dimensional coupled Ising ferromagnet with a small coercivity.

UR - https://www.scopus.com/pages/publications/79961187810

U2 - 10.1103/PhysRevB.83.212403

DO - 10.1103/PhysRevB.83.212403

M3 - 文章

AN - SCOPUS:79961187810

SN - 1098-0121

VL - 83

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 21

M1 - 212403

ER -

Evidence of three-dimensional Ising ferromagnetism in the A-site-ordered perovskite CaCu₃Ge₄O₁₂

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