日本語フィールド
著者：S. Maegawa , A. Oyamada , S. Sato , M. Nishiyama , T. Itou and X. G. Zheng題名：Spin dynamics in 3d Electron Pyrochlore-like Systems発表情報：Journal of Physics 巻: 145 ページ: 012018-1-012018-4キーワード：Magnetic phase boundaries, Spin waves, Dynamic properties概要：1H NMR measurements of 3d electron three-dimensional frustrated systems, Co2(OH)3Cl with s = 3/2 and Cu2(OH)3Cl with s = 1/2 have been performed. The relaxation rates T-11 of both compounds suggest the development of spin correlations at much higher temperatures compared with the magnetic transition temperatures. The temperature dependence of T-11 below 6 K of both compounds indicates the magnetic ordering and the existence of magnon excitations. The estimated magnon energy gaps are 13 K and 27 K for Cu2(OH)3Cl and Co2(OH)3Cl, respectively, which are consistent with the inelastic neutron experiments. The intermediate phase between TN1 = 18.1 K and TN2 = 6.4 K for Cu2(OH)3Cl shows the conflicting behaviors which are the coexistence of the freezing of the moments and the paramagnetic spin dynamics. The partial freezing and the time scale of spin dynamics should be crucial to understand these frustrated systems.抄録：1H NMR measurements of 3d electron three-dimensional frustrated systems, Co2(OH)3Cl with s = 3/2 and Cu2(OH)3Cl with s = 1/2 have been performed. The relaxation rates T-11 of both compounds suggest the development of spin correlations at much higher temperatures compared with the magnetic transition temperatures. The temperature dependence of T-11 below 6 K of both compounds indicates the magnetic ordering and the existence of magnon excitations. The estimated magnon energy gaps are 13 K and 27 K for Cu2(OH)3Cl and Co2(OH)3Cl, respectively, which are consistent with the inelastic neutron experiments. The intermediate phase between TN1 = 18.1 K and TN2 = 6.4 K for Cu2(OH)3Cl shows the conflicting behaviors which are the coexistence of the freezing of the moments and the paramagnetic spin dynamics. The partial freezing and the time scale of spin dynamics should be crucial to understand these frustrated systems.英語フィールド
Author：S. Maegawa , A. Oyamada , S. Sato , M. Nishiyama , T. Itou and X. G. ZhengTitle：Spin dynamics in 3d Electron Pyrochlore-like SystemsAnnouncement information:Journal of Physics Vol: 145 Page: 012018-1-012018-4Keyword：Magnetic phase boundaries, Spin waves, Dynamic propertiesAn abstract：1H NMR measurements of 3d electron three-dimensional frustrated systems, Co2(OH)3Cl with s = 3/2 and Cu2(OH)3Cl with s = 1/2 have been performed. The relaxation rates T-11 of both compounds suggest the development of spin correlations at much higher temperatures compared with the magnetic transition temperatures. The temperature dependence of T-11 below 6 K of both compounds indicates the magnetic ordering and the existence of magnon excitations. The estimated magnon energy gaps are 13 K and 27 K for Cu2(OH)3Cl and Co2(OH)3Cl, respectively, which are consistent with the inelastic neutron experiments. The intermediate phase between TN1 = 18.1 K and TN2 = 6.4 K for Cu2(OH)3Cl shows the conflicting behaviors which are the coexistence of the freezing of the moments and the paramagnetic spin dynamics. The partial freezing and the time scale of spin dynamics should be crucial to understand these frustrated systems.An abstract：1H NMR measurements of 3d electron three-dimensional frustrated systems, Co2(OH)3Cl with s = 3/2 and Cu2(OH)3Cl with s = 1/2 have been performed. The relaxation rates T-11 of both compounds suggest the development of spin correlations at much higher temperatures compared with the magnetic transition temperatures. The temperature dependence of T-11 below 6 K of both compounds indicates the magnetic ordering and the existence of magnon excitations. The estimated magnon energy gaps are 13 K and 27 K for Cu2(OH)3Cl and Co2(OH)3Cl, respectively, which are consistent with the inelastic neutron experiments. The intermediate phase between TN1 = 18.1 K and TN2 = 6.4 K for Cu2(OH)3Cl shows the conflicting behaviors which are the coexistence of the freezing of the moments and the paramagnetic spin dynamics. The partial freezing and the time scale of spin dynamics should be crucial to understand these frustrated systems.