Non-mean-field interpretation of the irreversibility line in spin-glasses

A. P. Malozemoff; S. E. Barnes; B. Barbara

doi:10.1103/PhysRevLett.51.1704

Non-mean-field interpretation of the irreversibility line in spin-glasses

A. P. Malozemoff, S. E. Barnes, B. Barbara

Physics

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

70 Scopus citations

Abstract

Susceptibility data on an amorphous GdAl spin-glass show an irreversibility onset line t=-A H2φ - and a susceptibility crossover line t=+A H2φ++ (t is reduced temperature; H is field). The exponents φ are both close to 3, and the amplitudes A differ only by a factor of 2. In contrast to earlier explanations of the irreversibility in terms of a de Almeida-Thouless mean-field instability, here both crossovers are explained in terms of a non-mean-field scaling theory.

Original language	English (US)
Pages (from-to)	1704-1707
Number of pages	4
Journal	Physical Review Letters
Volume	51
Issue number	18
DOIs	https://doi.org/10.1103/PhysRevLett.51.1704
State	Published - 1983

ASJC Scopus subject areas

Physics and Astronomy(all)

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abstract = "Susceptibility data on an amorphous GdAl spin-glass show an irreversibility onset line t=-A H2φ - and a susceptibility crossover line t=+A H2φ++ (t is reduced temperature; H is field). The exponents φ are both close to 3, and the amplitudes A differ only by a factor of 2. In contrast to earlier explanations of the irreversibility in terms of a de Almeida-Thouless mean-field instability, here both crossovers are explained in terms of a non-mean-field scaling theory.",

author = "Malozemoff, {A. P.} and Barnes, {S. E.} and B. Barbara",

year = "1983",

doi = "10.1103/PhysRevLett.51.1704",

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AU - Barbara, B.

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N2 - Susceptibility data on an amorphous GdAl spin-glass show an irreversibility onset line t=-A H2φ - and a susceptibility crossover line t=+A H2φ++ (t is reduced temperature; H is field). The exponents φ are both close to 3, and the amplitudes A differ only by a factor of 2. In contrast to earlier explanations of the irreversibility in terms of a de Almeida-Thouless mean-field instability, here both crossovers are explained in terms of a non-mean-field scaling theory.

AB - Susceptibility data on an amorphous GdAl spin-glass show an irreversibility onset line t=-A H2φ - and a susceptibility crossover line t=+A H2φ++ (t is reduced temperature; H is field). The exponents φ are both close to 3, and the amplitudes A differ only by a factor of 2. In contrast to earlier explanations of the irreversibility in terms of a de Almeida-Thouless mean-field instability, here both crossovers are explained in terms of a non-mean-field scaling theory.

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