Observation of a magnetic-field-induced Griffiths phase in three-dimensional Ising random magnet Ni$_{p}$Mg$_{1-p}$(OH)$_{2}$ from absorption of AC magnetic susceptibility

Masatsugu Suzuki; Itsuko S. Suzuki

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arXiv · 0910.2898

Observation of a magnetic-field-induced Griffiths phase in three-dimensional Ising random magnet Ni$_{p}$Mg$_{1-p}$(OH)$_{2}$ from absorption of AC magnetic susceptibility

Masatsugu Suzuki·Itsuko S. Suzuki

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Abstract

The nature of the Griffiths phase in three-dimensional Ising random magnet Ni_{p}Mg_{1-p}(OH)_{2} (p = 0.10, 0.25, 0.315, 0.50, 0.80, and 1) is studied from the measurements of absorption (the out-of phase in AC magnetic susceptibility) in the field-cooled (FC) state. The temperature (T) dependence of absorption is measured in the vicinity of the critical temperature [Néel temperature for p = 0.50, 0.80, 1, and the spin glass transition temperature for p = 0.1, 0.25, 0.315] in the presence of an external magnetic field H. A broad peak is clearly observed for absorption vs T well above the critical temperature at H > 20 kOe. This result gives a piece of evidence for the magnetic-field induced Griffiths phase.

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Masatsugu Suzuki, Itsuko S. Suzuki. 2009-10-15. Observation of a magnetic-field-induced Griffiths phase in three-dimensional Ising random magnet Ni$_{p}$Mg$_{1-p}$(OH)$_{2}$ from absorption of AC magnetic susceptibility. https://arxiv.org/abs/0910.2898

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