科研之友
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摘要
An unusual 4f -superantiferromagnetic state characterized by simultaneous antiferromagnetic and spin-glass behaviors induced by particle-size reduction is revealed in metallic nanoparticles (approximate to 9 nm) of TbCu2. The Neel temperature is 46 K and the glassy freezing is below approximate to 9 K and governed by a critical slowing down process. Neutron diffraction at 1.8 K establishes the superantiferromagnetism. The latter is settled by the nanoparticle moments and the freezing mechanism is provided by the surface spins.
- 出版日期2013-5-24
- 单位中国地震局
