Room-temperature ferromagnetism in nanoparticles of superconducting materials

Shipra; A. Gomathi; A. Sundaresan; C. N. R. Rao

doi:10.1016/j.ssc.2007.04.041

Room-temperature ferromagnetism in nanoparticles of superconducting materials

Superconductivity 2007-06-06 v1 Materials Science

Authors: Shipra , A. Gomathi , A. Sundaresan , C. N. R. Rao

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Abstract

Nanoparticles of superconducting YBa2Cu3O7-delta (YBCO) (Tc = 91 K) exhibit ferromagnetism at room temperature while the bulk YBCO, obtained by heating the nanoparticles at high temperature (940 degree C), shows a linear magnetization curve. Across the superconducting transition temperature, the magnetization curve changes from that of a soft ferromagnet to a superconductor. Furthermore, our experiments reveal that not only nanoparticles of metal oxides but also metal nitrides such as NbN (Tc = 6 - 12 K) and delta-MoN (Tc ~ 6 K) exhibit room-temperature ferromagnetism.

Keywords

room-temperature ferromagnetism superconducting nanoparticles YBCO NbN delta-MoN metal nitrides magnetization

Cite

@article{arxiv.0706.0634,
  title  = {Room-temperature ferromagnetism in nanoparticles of superconducting materials},
  author = {Shipra and A. Gomathi and A. Sundaresan and C. N. R. Rao},
  journal= {arXiv preprint arXiv:0706.0634},
  year   = {2007}
}

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11 pages, 6 figures

Room-temperature ferromagnetism in nanoparticles of superconducting materials

Abstract

Keywords

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