Antiferromagnetism in CaCu3Ti4O12 studied by magnetic Raman spectroscopy

A. Koitzsch; G. Blumberg; A. Gozar; B. Dennis; A. P. Ramirez; A. P. Ramirez; S. Trebst; Shuichi Wakimoto

Antiferromagnetism in CaCu₃Ti₄O₁₂ studied by magnetic Raman spectroscopy

A. Koitzsch, G. Blumberg, A. Gozar, B. Dennis, A. P. Ramirez, A. P. Ramirez, S. Trebst, Shuichi Wakimoto

School of Arts and Sciences, Physics & Astronomy

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

77 Scopus citations

Abstract

For CaCu₃Ti₄O₁₂ - an insulator that exhibits a giant dielectric response above 100 K - Cu²⁺ antiferromagnetic spin ordering has been investigated by magnetic Raman scattering and magnetization measurements. Below the Néel temperature, T_N=25 K, magnetic excitations have been identified. Above T_N Raman spectra reveal short-range antiferromagnetic fluctuations that increase with cooling like T^-1. No deviations from Curie-Weiss law have been observed above T_N.

Original language	English (US)
Article number	052406
Pages (from-to)	524061-524064
Number of pages	4
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	65
Issue number	5
State	Published - Feb 1 2002

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Cite this

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title = "Antiferromagnetism in CaCu3Ti4O12 studied by magnetic Raman spectroscopy",

abstract = "For CaCu3Ti4O12 - an insulator that exhibits a giant dielectric response above 100 K - Cu2+ antiferromagnetic spin ordering has been investigated by magnetic Raman scattering and magnetization measurements. Below the N{\'e}el temperature, TN=25 K, magnetic excitations have been identified. Above TN Raman spectra reveal short-range antiferromagnetic fluctuations that increase with cooling like T-1. No deviations from Curie-Weiss law have been observed above TN.",

author = "A. Koitzsch and G. Blumberg and A. Gozar and B. Dennis and Ramirez, {A. P.} and Ramirez, {A. P.} and S. Trebst and Shuichi Wakimoto",

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AU - Koitzsch, A.

AU - Blumberg, G.

AU - Gozar, A.

AU - Dennis, B.

AU - Ramirez, A. P.

AU - Trebst, S.

AU - Wakimoto, Shuichi

PY - 2002/2/1

Y1 - 2002/2/1

N2 - For CaCu3Ti4O12 - an insulator that exhibits a giant dielectric response above 100 K - Cu2+ antiferromagnetic spin ordering has been investigated by magnetic Raman scattering and magnetization measurements. Below the Néel temperature, TN=25 K, magnetic excitations have been identified. Above TN Raman spectra reveal short-range antiferromagnetic fluctuations that increase with cooling like T-1. No deviations from Curie-Weiss law have been observed above TN.

AB - For CaCu3Ti4O12 - an insulator that exhibits a giant dielectric response above 100 K - Cu2+ antiferromagnetic spin ordering has been investigated by magnetic Raman scattering and magnetization measurements. Below the Néel temperature, TN=25 K, magnetic excitations have been identified. Above TN Raman spectra reveal short-range antiferromagnetic fluctuations that increase with cooling like T-1. No deviations from Curie-Weiss law have been observed above TN.

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M3 - Article

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ER -

Antiferromagnetism in CaCu₃Ti₄O₁₂ studied by magnetic Raman spectroscopy

Abstract

All Science Journal Classification (ASJC) codes

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