Polarized neutron scattering study of spin dynamics in La $_{2-x}$ (Sr,Ba) $_{x}$ CuO $_{4}$

Wakimoto, Shuichi ; Kakurai, Kazuhisa; Matsuda, Masaaki; Takeda, Masayasu ; Fujita, Masaki*; Yamada, Kazuyoshi*; Gu, G.*; Tranquada, J. M.*; Birgeneau, R. J.*; Zhang, H.*

Polarized neutron scattering exaperiments have been performed on La $_{1.875}$ Ba $_{0.125}$ CuO $_{4}$ and La $_{1.92}$ Sr $_{0.08}$ CuO $_{4}$ with intent to elucidate a possible effects of stripe structure to the spin dynamics. Low energy ( meV) data demonstratre that in the former sample, which has a well-ordered stripe state with Cu spins lying in the CuO plane at 10 K, spins fluctuate only in the plane. On the other hand, the latter sample, which has very weak stripe order, shows isotropic spin fluctuation. This implies that low energy magnetic excitations are stringly affected by the stripe order.

Language	:	Japanese
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Meeting title	:	特定領域研究「異常量子物質の創製; 新しい物理を生む新物質」2006年度成果報告会
Held date	:	2007/01
Location (city)	:	東京
Location (country)	:	日本
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Keywords	:	no keyword
Research Facility	:	JRR-3M(研究炉3)
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Registration No. : BB20062993
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Polarized neutron scattering study of spin dynamics in La(Sr,Ba)CuO

Polarized neutron scattering study of spin dynamics in La $_{2-x}$ (Sr,Ba) $_{x}$ CuO $_{4}$