Spin-glass behavior in amorphous BiFeO3

Shin Nakamura; Susumu Soeya; Naoshi Ikeda; Midori Tanaka

doi:10.1063/1.354179

Spin-glass behavior in amorphous BiFeO₃

Shin Nakamura, Susumu Soeya, Naoshi Ikeda, Midori Tanaka

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

55 Citations (Scopus)

Abstract

Short-range antiferromagnetic (speromagnetic) behavior was observed for amorphous BiFeO₃ by static magnetic measurements, ac susceptibility (χ_ac) measurement, and ⁵⁷Fe Mössbauer spectra measurements. The magnetic behavior is classified into three temperature ranges: (i) paramagnet for T≳220 K; (ii) local clustering of spins for 20 K<T<220 K; and (iii) speromagnet in which all spins are frozen into random directions for T<20 K. In the spin freezing state the magnetization shows irreversibility and the χ_ac-T curve has a cusp. The variation of the spin freezing temperature against measuring magnetic field and measuring frequency indicate that the speromagnetic order is very similar to that of spin glass.

Original language	English
Pages (from-to)	5652-5657
Number of pages	6
Journal	Journal of Applied Physics
Volume	74
Issue number	9
DOIs	https://doi.org/10.1063/1.354179
Publication status	Published - 1993
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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abstract = "Short-range antiferromagnetic (speromagnetic) behavior was observed for amorphous BiFeO3 by static magnetic measurements, ac susceptibility (χac) measurement, and 57Fe M{\"o}ssbauer spectra measurements. The magnetic behavior is classified into three temperature ranges: (i) paramagnet for T≳220 K; (ii) local clustering of spins for 20 K<T<220 K; and (iii) speromagnet in which all spins are frozen into random directions for T<20 K. In the spin freezing state the magnetization shows irreversibility and the χac-T curve has a cusp. The variation of the spin freezing temperature against measuring magnetic field and measuring frequency indicate that the speromagnetic order is very similar to that of spin glass.",

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AU - Nakamura, Shin

AU - Soeya, Susumu

AU - Ikeda, Naoshi

AU - Tanaka, Midori

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N2 - Short-range antiferromagnetic (speromagnetic) behavior was observed for amorphous BiFeO3 by static magnetic measurements, ac susceptibility (χac) measurement, and 57Fe Mössbauer spectra measurements. The magnetic behavior is classified into three temperature ranges: (i) paramagnet for T≳220 K; (ii) local clustering of spins for 20 K<T<220 K; and (iii) speromagnet in which all spins are frozen into random directions for T<20 K. In the spin freezing state the magnetization shows irreversibility and the χac-T curve has a cusp. The variation of the spin freezing temperature against measuring magnetic field and measuring frequency indicate that the speromagnetic order is very similar to that of spin glass.

AB - Short-range antiferromagnetic (speromagnetic) behavior was observed for amorphous BiFeO3 by static magnetic measurements, ac susceptibility (χac) measurement, and 57Fe Mössbauer spectra measurements. The magnetic behavior is classified into three temperature ranges: (i) paramagnet for T≳220 K; (ii) local clustering of spins for 20 K<T<220 K; and (iii) speromagnet in which all spins are frozen into random directions for T<20 K. In the spin freezing state the magnetization shows irreversibility and the χac-T curve has a cusp. The variation of the spin freezing temperature against measuring magnetic field and measuring frequency indicate that the speromagnetic order is very similar to that of spin glass.

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