Observation of a Field-Driven Structural Phase Transition in the Flux Line Lattice in ErNi{sub 2}B{sub 2}C
Observation of a Field-Driven Structural Phase Transition in the Flux Line Lattice in ErNi{sub 2}B{sub 2}C
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ErNi{sub 2}B{sub 2}C 磁通线晶格中场驱动结构相变的观察
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发表时间：
1997
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通讯作者：
P. Canfield
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作者：
M. Eskildsen;P. Gammel;B. Barber;U. Yaron;A. P. Ramirez;D. Huse;D. Bishop;C. Bolle;Charles M. Lieber;S. Oxx;S. Sridhar;N. Andersen;K. Mortensen;P. Canfield
在ErNi{sub 2}B{sub 2}C中，小角中子散射和磁装饰均表现出通量线晶格（FLL）的拓扑跃迁。高场方形晶格通过在大约500Oe以下保持区域[100]的菱形畸变缓慢地转变为六边形晶格。方形FLL与四方晶体的[110]方向对齐，而六边形FLL的两个畴与[100]和[010]方向对齐。两种FLL拓扑结构的钉住差异反映在射频动态电感上。{版权所有}{ital 1997} {ital美国物理学会}
Small-angle neutron scattering and magnetic decoration both demonstrate a topological transition in the flux line lattice (FLL) in ErNi{sub 2}B{sub 2}C. The high-field square lattice slowly transforms into a hexagonal lattice via an area preserving [100] rhombohedral distortion below roughly 500Oe. The square FLL is aligned with the [110] direction of the tetragonal crystal, while the two domains of the hexagonal FLL are aligned with [100] and [010]. The differences in pinning for the two FLL topologies are reflected in the rf kinetic inductance. {copyright} {ital 1997} {ital The American Physical Society}