日本語フィールド
著者： X.G. Zheng, M. Hagihala, T. Kawae, C.N. Xu題名： Defect-induced short-range-order from a spin-ice related state in deformed pyrochlore Co2(OH)3Cl発表情報： Phys. Rev. B 77, 024418 1-5 (2008). 巻: 77 ページ: 024418 1-5キーワード：Deformed pyrochlore, quantum magnetism, shor-range-order概要：抄録：Recently we observed a kagom�-ice-like partial ferromagnetic order with coexisting fluctuation in a deformed pyrochlore structure Co2(OH)3Cl. Here we show that when lattice defects are present the remaining fluctuating spins in this material further freeze at lower temperatures below T< Tg = 4 K after it initially freezes into the partial ferromagnetic order near TC = 10 K. This low-temperature transition is glass-like requiring an extremely slow relaxation process in Co2(OH)3Cl. Enhanced disorder in (Co1-xAlx)2(OH)3Cl leads to a short-range order for the fluctuating spins. This result can be considered as an interesting analogy to the low-temperature anomaly in defect-containing pure and doped water ice, especially in the light of its relevance to the problem of residual entropy in ice-water or spin-ice transition.英語フィールド
Author： X.G. Zheng, M. Hagihala, T. Kawae, C.N. XuTitle： Defect-induced short-range-order from a spin-ice related state in deformed pyrochlore Co2(OH)3ClAnnouncement information: Phys. Rev. B 77, 024418 1-5 (2008). Vol: 77 Page: 024418 1-5Keyword：Deformed pyrochlore, quantum magnetism, shor-range-orderAn abstract：Recently we observed a kagom�-ice-like partial ferromagnetic order with coexisting fluctuation in a deformed pyrochlore structure Co2(OH)3Cl. Here we show that when lattice defects are present the remaining fluctuating spins in this material further freeze at lower temperatures below T< Tg = 4 K after it initially freezes into the partial ferromagnetic order near TC = 10 K. This low-temperature transition is glass-like requiring an extremely slow relaxation process in Co2(OH)3Cl. Enhanced disorder in (Co1-xAlx)2(OH)3Cl leads to a short-range order for the fluctuating spins. This result can be considered as an interesting analogy to the low-temperature anomaly in defect-containing pure and doped water ice, especially in the light of its relevance to the problem of residual entropy in ice-water or spin-ice transition.