Phase transitions in random anisotropy magnets

M. J. O'Shea; S. G. Cornelison; Z. D. Chen; D. J. Sellmyer

doi:10.1016/0038-1098(83)90659-2

Phase transitions in random anisotropy magnets

M. J. O'Shea, S. G. Cornelison, Z. D. Chen, D. J. Sellmyer

Physics and Astronomy

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17 Scopus citations

Abstract

We report a study of magnetic properties and phase transitions in random anisotropy glasses rich in the rare-earth elements Gd, Tb and Nd. For the Gd glass, which has a small magnetic anisotropy, we find an extremely large, possibly infinite, susceptibility below 120 K and no intrinsic spontaneous magnetization. Below 55 K an hysteretic state develops. The Tb and Nd glasses, both of which have large anisotropy, exhibit transitions to a speromagneic state and they do not show an infinite susceptibility phase. The results are discussed in terms of recent theoretical predictions concerning phase transitions in the presence of random magnetic anisotropy.

Original language	English (US)
Pages (from-to)	313-316
Number of pages	4
Journal	Solid State Communications
Volume	46
Issue number	4
DOIs	https://doi.org/10.1016/0038-1098(83)90659-2
State	Published - Apr 1983

ASJC Scopus subject areas

General Chemistry
Condensed Matter Physics
Materials Chemistry

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10.1016/0038-1098(83)90659-2

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title = "Phase transitions in random anisotropy magnets",

abstract = "We report a study of magnetic properties and phase transitions in random anisotropy glasses rich in the rare-earth elements Gd, Tb and Nd. For the Gd glass, which has a small magnetic anisotropy, we find an extremely large, possibly infinite, susceptibility below 120 K and no intrinsic spontaneous magnetization. Below 55 K an hysteretic state develops. The Tb and Nd glasses, both of which have large anisotropy, exhibit transitions to a speromagneic state and they do not show an infinite susceptibility phase. The results are discussed in terms of recent theoretical predictions concerning phase transitions in the presence of random magnetic anisotropy.",

author = "O'Shea, {M. J.} and Cornelison, {S. G.} and Chen, {Z. D.} and Sellmyer, {D. J.}",

note = "Funding Information: Acknowledgements - We would like to thank Jim Nabity for making our samples, Drs. S. von Molnar and E. Pytte for helpful communications, and Professor A. Starace for a useful discussion. We are grateful to the National Science Foundation for support of this research under Grant DMR-8110520.",

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AU - O'Shea, M. J.

AU - Cornelison, S. G.

AU - Chen, Z. D.

AU - Sellmyer, D. J.

N1 - Funding Information: Acknowledgements - We would like to thank Jim Nabity for making our samples, Drs. S. von Molnar and E. Pytte for helpful communications, and Professor A. Starace for a useful discussion. We are grateful to the National Science Foundation for support of this research under Grant DMR-8110520.

PY - 1983/4

Y1 - 1983/4

N2 - We report a study of magnetic properties and phase transitions in random anisotropy glasses rich in the rare-earth elements Gd, Tb and Nd. For the Gd glass, which has a small magnetic anisotropy, we find an extremely large, possibly infinite, susceptibility below 120 K and no intrinsic spontaneous magnetization. Below 55 K an hysteretic state develops. The Tb and Nd glasses, both of which have large anisotropy, exhibit transitions to a speromagneic state and they do not show an infinite susceptibility phase. The results are discussed in terms of recent theoretical predictions concerning phase transitions in the presence of random magnetic anisotropy.

AB - We report a study of magnetic properties and phase transitions in random anisotropy glasses rich in the rare-earth elements Gd, Tb and Nd. For the Gd glass, which has a small magnetic anisotropy, we find an extremely large, possibly infinite, susceptibility below 120 K and no intrinsic spontaneous magnetization. Below 55 K an hysteretic state develops. The Tb and Nd glasses, both of which have large anisotropy, exhibit transitions to a speromagneic state and they do not show an infinite susceptibility phase. The results are discussed in terms of recent theoretical predictions concerning phase transitions in the presence of random magnetic anisotropy.

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Phase transitions in random anisotropy magnets

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