Remarkable enhancement of magnetization in the superconducting state of In/Ni nanoparticle composites by inhomogeneous spin anti-screening

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• 作者：Chi-Hung Lee (1)
  Chi-Yen Li (1)
  Sunil K. Karna (1)
  Erdembayalag Batsaikhan (1)
  Shih-Bin Liu (1)
  Chi-Hang Hung (1)
  Yang-Yuan Chen (2)
  Wen-Hsien Li (1)
  
• 关键词：Anti ; screening ; Superconductivity ; In nanoparticle ; Magnetization
• 刊名：Journal of Nanoparticle Research
• 出版年：2014
• 出版时间：June 2014
• 年：2014
• 卷：16
• 期：6
• 全文大小：
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• 作者单位：Chi-Hung Lee (1)
  Chi-Yen Li (1)
  Sunil K. Karna (1)
  Erdembayalag Batsaikhan (1)
  Shih-Bin Liu (1)
  Chi-Hang Hung (1)
  Yang-Yuan Chen (2)
  Wen-Hsien Li (1)
  
  1. Department of Physics, National Central University, Jhongli, 32001, Taiwan
  2. Institute of Physics, Academia Sinica, Taipei, 11529, Taiwan
  
• ISSN：1572-896X

文摘

An enhancement of the superconducting transition temperature and development of an additional magnetic component in the superconducting state, initiated by inhomogeneous spin anti-screening are demonstrated in In/Ni nanoparticle composites. A significant 9?% increase of the superconducting transition temperature as a consequence of the magnetic proximities is detected. Unconventional cross-shaped magnetization hysteresis loops appear in densely packed assemblies, where magnetization increases, rather than decreases, upon entering the superconducting state in field-decreasing loops. Surprisingly, magnetization in the superconducting state can reach values as large as 3.5 times the saturation magnetization revealed in the normal state.