タイトル無し

スポンサーリンク

概要

• 論文の詳細を見る

• Nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR) of Cu have been measured in a coupled spin dimers and chains compound Cu<inf>2</inf>Fe<inf>2</inf>Ge<inf>4</inf>O<inf>13</inf>. Cu NQR has also been measured in an isostructural material Cu<inf>2</inf>Sc<inf>2</inf>Ge<inf>4</inf>O<inf>13</inf>including only spin dimers. Comparison of the temperature dependence of the ⁶³Cu nuclear spin--lattice relaxation rate between the two compounds reveals that the Fe chains in Cu<inf>2</inf>Fe<inf>2</inf>Ge<inf>4</inf>O<inf>13</inf>do not change a spin gap energy of the Cu dimers from that in Cu<inf>2</inf>Sc<inf>2</inf>Ge<inf>4</inf>O<inf>13</inf>, contributing additionally to the relaxation rate at the Cu site. A modestly large internal field of 3.39 T was observed at the Cu site in the antiferromagnetic state of Cu<inf>2</inf>Fe<inf>2</inf>Ge<inf>4</inf>O<inf>13</inf>at 4.2 K, which is partly because of quantum reduction of the ordered moment of a Cu atom. The internal field and the ordered moment of Cu are noncollinear due to large anisotropy of the hyperfine interaction at the Cu site. A model analysis of the internal field based on the fourfold planar coordination of Cu suggests that a 3d hole of the Cu²⁺ion is mainly in the d(x^{2}-y^{2}) orbital state.

• 2013-03-15

著者

• Kikuchi Jun

  Department Of Applied Chemistry Graduate School Of Engineering Tokyo University Of Agriculture And T

• Masuda Takatsugu

  Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan

• Nagura Shiro

  Department of Physics, School of Science and Technology, Meiji University, Kawasaki 214-8571, Japan

• Murakami Kazumasa

  Department of Physics, School of Science and Technology, Meiji University, Kawasaki 214-8571, Japan

• Redhammer Günther

  Department of Materials Engineering and Physics, University of Salzburg, Salzburg A-5020, Austria

関連論文

• Conformations of Synthetic Model Peptides for Plasmodium falciparum Circumsporozoite Protein in Me_2SO by ^1H NMR and Distance Geometry Calculations
• Cu NMR and NQR Studies of the Doped Spin-Peierls System CuGe_Si_xO_3
• Spin Diffusion in the S=1/2 Quasi One-Dimensional Antiferromagnet α-VO(PO_3)_2 via ^P NMR
• Thermodynamic Analysis of Various Types of Hydride Vapor Phase Epitaxy System for High-Speed Growth of InN
• NMR and Neutron Scattering Studies of Quasi One-Dimensional Magnet CuV_2O_6 : Electronic Properties, etc.
• Primitive neuroectodermal tumor of the breast : Immunohistochemistry and fluorescence in situ hybridization
• Parathyroid carcinoma with anaplastic feature : Association of a p53 gene mutation with anaplastic transformation
• Elective Plug Repair of an Incarcerated Obturator Hernia by the Thigh Approach After Noninvasive Manual Reduction : Report of Two Cases
• タイトル無し
• Spin Diffusion in the S=1/2 Quasi One-Dimensional Antiferromagnet α-VO(PO3)2 via 31P NMR
• ⁶³[,]⁶⁵Cu Nuclear Resonance Study of the Coupled Spin Dimers and Chains Compound Cu₂Fe₂Ge₄O₁₃

もっと見る 閉じる

スポンサーリンク