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Room-temperature ferromagnetism in nanoparticles of superconducting materials
Authors:Shipra  CNR Rao
Institution:Chemistry and Physics of Materials Unit and Department of Science and Technology Unit on Nanoscience, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P.O., Bangalore 560 064, India
Abstract:Nanoparticles of superconducting View the MathML source (YBCO) (View the MathML source) exhibit ferromagnetism at room temperature while the bulk YBCO, obtained by heating the nanoparticles at high temperature (940 °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 (View the MathML source) and δ-MoN (View the MathML source) exhibit room-temperature ferromagnetism.
Keywords:75  30  Pd  71  24  +q  74  72  Bk
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