日本語フィールド
著者：Xu-Guang Zheng, Md. Mahbubur Rahman Bhuiyan, Ichihiro Yamauchi, Masayoshi Fujihala, Kunihisa Sugimoto, Tatsuya Kawae, Toru Ishigaki題名：Unusual magnetism in a d-electron compound Fe(OH)Cl: a X-Y stacked-triangular
antiferromagnet with characteristic double-bridge bonding, unquenched orbital moment and coexisting spin fluctuations発表情報：Journal of the Physical Society of Japanキーワード：概要：抄録：Single crystals of triangular-lattice Fe(OH)Cl in orthorhombic structure were synthesized and its magnetism was studied thoroughly using multiple magnetic probes of magnetization, muon spin rotation/relaxation (muSR) and neutron diffraction. Antiferromagnetic transition was found at TN = 13.3 K together with slow dynamics and surprisingly unquenched orbital moments in the paramagnetic state. Residual spin fluctuations coexisting with a long-range order below TN were witnessed in SR. A coplanar spin structure of propagation vector k = (0, 0, 0) confined within the triangular lattice was revealed by neutron diffraction to have a relatively small frozen moment of 1.96 B. Ferromagnetic superexchange interactions through a characteristic zig-zag path via ~90o angled double Fe==O==Fe and double Fe==Cl==Fe bridges counted for this spin arrangement, presenting similarity and contrasting difference to the antiferromagnetic zig-zag path in the S = 1/2 triangulbeta = 0.2585(16), in Fe(OD)Cl agrees well with the theoretical value 0.253∓0.01 in the X-Y frustrated spin model for stacked-triangular antiferromagnet. Experimental evidence all consistently demonstrate the existence of magnetic order with extensive spin fluctuations on a wide range from ~1 s to 10-9-10-12 s. This work presents a unique system for studying geometric frustration on frustrated triangular lattice with unquenched orbital moment.英語フィールド
Author：Xu-Guang Zheng, Md. Mahbubur Rahman Bhuiyan, Ichihiro Yamauchi, Masayoshi Fujihala, Kunihisa Sugimoto, Tatsuya Kawae, Toru IshigakiTitle：Unusual magnetism in a d-electron compound Fe(OH)Cl: a X-Y stacked-triangular
antiferromagnet with characteristic double-bridge bonding, unquenched orbital moment and coexisting spin fluctuationsAnnouncement information:Journal of the Physical Society of JapanAn abstract：Single crystals of triangular-lattice Fe(OH)Cl in orthorhombic structure were synthesized and its magnetism was studied thoroughly using multiple magnetic probes of magnetization, muon spin rotation/relaxation (muSR) and neutron diffraction. Antiferromagnetic transition was found at TN = 13.3 K together with slow dynamics and surprisingly unquenched orbital moments in the paramagnetic state. Residual spin fluctuations coexisting with a long-range order below TN were witnessed in SR. A coplanar spin structure of propagation vector k = (0, 0, 0) confined within the triangular lattice was revealed by neutron diffraction to have a relatively small frozen moment of 1.96 B. Ferromagnetic superexchange interactions through a characteristic zig-zag path via ~90o angled double Fe==O==Fe and double Fe==Cl==Fe bridges counted for this spin arrangement, presenting similarity and contrasting difference to the antiferromagnetic zig-zag path in the S = 1/2 triangulbeta = 0.2585(16), in Fe(OD)Cl agrees well with the theoretical value 0.253∓0.01 in the X-Y frustrated spin model for stacked-triangular antiferromagnet. Experimental evidence all consistently demonstrate the existence of magnetic order with extensive spin fluctuations on a wide range from ~1 s to 10-9-10-12 s. This work presents a unique system for studying geometric frustration on frustrated triangular lattice with unquenched orbital moment.