2017年1月
Instability of spin glass phase in divalent iron phosphate glass under a magnetic field
JOURNAL OF PHYSICS-CONDENSED MATTER
- ,
- ,
- ,
- 巻
- 29
- 号
- 2
- 開始ページ
- 025802
- 終了ページ
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1088/0953-8984/29/2/025802
- 出版者・発行元
- IOP PUBLISHING LTD
The spin glass behaviour of 50FeO . 50P(2)O(5) (in mol%) glass has been examined under finite magnetic fields. The Sherrington-Kirkpatrick (SK) model, i.e. the mean field theory, is unsuitable for the interpretation of the frequency dependence of the ac magnetic susceptibility observed under an external field of 0.1 T; the critical exponent derived from the SK model is unphysically large. On the other hand, the droplet model explains well the frequency and field dependence of the spin-freezing temperature and the exponent of the thermally activated process is within the range defined by the droplet model. The results indicate that the spin glass phase of the 50FeO . 50P(2)O(5) glass is unstable against magnetic fields.
- リンク情報
- ID情報
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- DOI : 10.1088/0953-8984/29/2/025802
- ISSN : 0953-8984
- eISSN : 1361-648X
- Web of Science ID : WOS:000388615900002