Josephson effects in ferromagnetic superconductors: Noise effect due to critical spin fluctuations

T. Koyama; M. Tachiki

doi:10.1103/PhysRevB.30.6463

Josephson effects in ferromagnetic superconductors: Noise effect due to critical spin fluctuations

T. Koyama, M. Tachiki

Institute for Materials Research (IMR)

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

2 Citations (Scopus)

Abstract

A theory for the Josephson effect in the ferromagnetic superconductors is presented. Taking account of critical fluctuations of the localized-spin magnetization, we calculate the magnetic field dependence of the maximum Josephson current and I-V characteristics. The Josephson current is reduced by a noise effect arising from the critical spin fluctuations at low temperatures. The anomalous behaviors observed in the dc Josephson effect in ErRh4B4-LuxOy-In junctions are interpreted on the basis of present theory.

Original language	English
Pages (from-to)	6463-6479
Number of pages	17
Journal	Physical Review B
Volume	30
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevB.30.6463
Publication status	Published - 1984 Jan 1

ASJC Scopus subject areas

Condensed Matter Physics

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abstract = "A theory for the Josephson effect in the ferromagnetic superconductors is presented. Taking account of critical fluctuations of the localized-spin magnetization, we calculate the magnetic field dependence of the maximum Josephson current and I-V characteristics. The Josephson current is reduced by a noise effect arising from the critical spin fluctuations at low temperatures. The anomalous behaviors observed in the dc Josephson effect in ErRh4B4-LuxOy-In junctions are interpreted on the basis of present theory.",

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N2 - A theory for the Josephson effect in the ferromagnetic superconductors is presented. Taking account of critical fluctuations of the localized-spin magnetization, we calculate the magnetic field dependence of the maximum Josephson current and I-V characteristics. The Josephson current is reduced by a noise effect arising from the critical spin fluctuations at low temperatures. The anomalous behaviors observed in the dc Josephson effect in ErRh4B4-LuxOy-In junctions are interpreted on the basis of present theory.

AB - A theory for the Josephson effect in the ferromagnetic superconductors is presented. Taking account of critical fluctuations of the localized-spin magnetization, we calculate the magnetic field dependence of the maximum Josephson current and I-V characteristics. The Josephson current is reduced by a noise effect arising from the critical spin fluctuations at low temperatures. The anomalous behaviors observed in the dc Josephson effect in ErRh4B4-LuxOy-In junctions are interpreted on the basis of present theory.

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