Room-temperature ferromagnetism in nanoparticles of superconducting materials

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.

11 pages, 6 figures

References in corpus (1)

• Ferromagnetism as a universal feature of nanoparticles of the otherwise nonmagnetic oxides

Cited by in corpus (5)

• Sources of experimental errors in the observation of nanoscale magnetism
• Large Enhancement of Ferro-Magnetism under Collective Strong Coupling of YBCO Nanoparticles
• Ferromagnetism in transparent Mn(II)-doped indium tin oxide films prepared by sol-gel process
• Room temperature soft ferromagnetism in the nanocrystalline form of YCo2 - a well-known bulk Pauli paramagnet
• Reentrant superconductivity in YBa${}_2$Cu${}_3$O${}_{7-d}$ microstructured particles