First-order-like magnetic transition in manganite oxide La0.7Ca0.3MnO3

H. S. Shin; J. E. Lee; Y. S. Nam; H. L. Ju; C. W. Park

doi:10.1016/S0038-1098(01)00123-5

First-order-like magnetic transition in manganite oxide La_0.7Ca_0.3MnO₃

H. S. Shin, J. E. Lee, Y. S. Nam, H. L. Ju, C. W. Park

Department of Physics

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

123 Citations (Scopus)

Abstract

We present a dc magnetization study of the critical phenomena of a manganite oxide La_0.7Ca_0.3MnO₃ single crystal. Based on the assumption of a continuous (second-order) magnetic transition for La_0.7Ca_0.3MnO₃, we have determined the critical temperature T_C = 222 ± 0.2 K and the critical exponents β = 0.14 ± 0.02 (β: critical exponent for the temperature dependence of spontaneous magnetization just below T_C), and γ = 0.81 ± 0.03 (γ: critical exponent for the inverse initial susceptibility just above T_C). The values of the critical exponents of La_0.7Ca_0.3MnO₃ are different from those predicted based on various theoretical models, and even from those of higher T_C manganite oxides, such as La_0.7Sr_0.3MnO₃ (T_C = 354 K). In addition, Arrot and scaling plots were found to be invalid in the immediate vicinity of T_C; this suggests that the magnetic transitional behaviors for La_0.7Ca_0.3MnO₃ are different from those expected for a second-order transition.

Original language	English
Pages (from-to)	377-380
Number of pages	4
Journal	Solid State Communications
Volume	118
Issue number	7
DOIs	https://doi.org/10.1016/S0038-1098(01)00123-5
Publication status	Published - 2001 May 22

Bibliographical note

Funding Information:
We thank Dr B. I. Min for his helpful suggestions. The authors wish to acknowledge the financial support of the Korean Research Foundation made in the program year of 1998.

All Science Journal Classification (ASJC) codes

Chemistry(all)
Condensed Matter Physics
Materials Chemistry

Access to Document

10.1016/S0038-1098(01)00123-5

Cite this

@article{cfd3e4ae65a84149b297b23455bb32cb,

title = "First-order-like magnetic transition in manganite oxide La0.7Ca0.3MnO3",

abstract = "We present a dc magnetization study of the critical phenomena of a manganite oxide La0.7Ca0.3MnO3 single crystal. Based on the assumption of a continuous (second-order) magnetic transition for La0.7Ca0.3MnO3, we have determined the critical temperature TC = 222 ± 0.2 K and the critical exponents β = 0.14 ± 0.02 (β: critical exponent for the temperature dependence of spontaneous magnetization just below TC), and γ = 0.81 ± 0.03 (γ: critical exponent for the inverse initial susceptibility just above TC). The values of the critical exponents of La0.7Ca0.3MnO3 are different from those predicted based on various theoretical models, and even from those of higher TC manganite oxides, such as La0.7Sr0.3MnO3 (TC = 354 K). In addition, Arrot and scaling plots were found to be invalid in the immediate vicinity of TC; this suggests that the magnetic transitional behaviors for La0.7Ca0.3MnO3 are different from those expected for a second-order transition.",

author = "Shin, {H. S.} and Lee, {J. E.} and Nam, {Y. S.} and Ju, {H. L.} and Park, {C. W.}",

note = "Funding Information: We thank Dr B. I. Min for his helpful suggestions. The authors wish to acknowledge the financial support of the Korean Research Foundation made in the program year of 1998.",

year = "2001",

month = may,

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doi = "10.1016/S0038-1098(01)00123-5",

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T1 - First-order-like magnetic transition in manganite oxide La0.7Ca0.3MnO3

AU - Shin, H. S.

AU - Lee, J. E.

AU - Nam, Y. S.

AU - Ju, H. L.

AU - Park, C. W.

N1 - Funding Information: We thank Dr B. I. Min for his helpful suggestions. The authors wish to acknowledge the financial support of the Korean Research Foundation made in the program year of 1998.

PY - 2001/5/22

Y1 - 2001/5/22

N2 - We present a dc magnetization study of the critical phenomena of a manganite oxide La0.7Ca0.3MnO3 single crystal. Based on the assumption of a continuous (second-order) magnetic transition for La0.7Ca0.3MnO3, we have determined the critical temperature TC = 222 ± 0.2 K and the critical exponents β = 0.14 ± 0.02 (β: critical exponent for the temperature dependence of spontaneous magnetization just below TC), and γ = 0.81 ± 0.03 (γ: critical exponent for the inverse initial susceptibility just above TC). The values of the critical exponents of La0.7Ca0.3MnO3 are different from those predicted based on various theoretical models, and even from those of higher TC manganite oxides, such as La0.7Sr0.3MnO3 (TC = 354 K). In addition, Arrot and scaling plots were found to be invalid in the immediate vicinity of TC; this suggests that the magnetic transitional behaviors for La0.7Ca0.3MnO3 are different from those expected for a second-order transition.

AB - We present a dc magnetization study of the critical phenomena of a manganite oxide La0.7Ca0.3MnO3 single crystal. Based on the assumption of a continuous (second-order) magnetic transition for La0.7Ca0.3MnO3, we have determined the critical temperature TC = 222 ± 0.2 K and the critical exponents β = 0.14 ± 0.02 (β: critical exponent for the temperature dependence of spontaneous magnetization just below TC), and γ = 0.81 ± 0.03 (γ: critical exponent for the inverse initial susceptibility just above TC). The values of the critical exponents of La0.7Ca0.3MnO3 are different from those predicted based on various theoretical models, and even from those of higher TC manganite oxides, such as La0.7Sr0.3MnO3 (TC = 354 K). In addition, Arrot and scaling plots were found to be invalid in the immediate vicinity of TC; this suggests that the magnetic transitional behaviors for La0.7Ca0.3MnO3 are different from those expected for a second-order transition.

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