Mixed spin (1/2,1) transverse Ising nanoparticles
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- 作者：M. Mouhib ; N. Benayad ; n.benayad@fsac.ac.ma" class="auth_mail" title="E-mail the corresponding author ; noureddine_benayad@yahoo.fr" class="auth_mail" title="E-mail the corresponding author ; M. Azhari
- 关键词：Mixed spin ; Circle and square 2D-nanoparticle ; Transverse Ising model ; Finite cluster approximation ; Phase diagrams
- 刊名：Journal of Magnetism and Magnetic Materials
- 出版年：2016
- 出版时间：1 December 2016
- 年：2016
- 卷：419
- 期：Complete
- 页码：325-337
- 全文大小：2050 K
文摘
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We derive the state equations for mixed spin transverse Ising nanoparticles.
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The effects of the exchange interactions and the transverse field on the phase diagrams are discussed.
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The shell and the core undergo an order–disorder transition at the same temperature.
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The nanoparticles exhibit a reentrant behavior due to the competition between the exchange interaction and the core transverse field.