Growth of M-type hexaferrite thin films with conical magnetic structure
Growth of M-type hexaferrite thin films with conical magnetic structure
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DOI：
10.1063/1.4776223
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发表时间：
2013-01
影响因子：
4
通讯作者：
P. Borisov;J. Alaria;Tao Yang;S. Mcmitchell;M. Rosseinsky
中科院分区：
文献类型：
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作者：
P. Borisov;J. Alaria;Tao Yang;S. Mcmitchell;M. Rosseinsky
用脉冲激光沉积法在Al_2O_3（00.1）衬底上生长了M型六角铁氧体BaFe_（10.2）Sc_（1.8）O_（19）薄膜。沉积后退火改善了结构质量，并产生完全弛豫的薄膜。退火后的薄膜表现出对应于锥形磁结构的磁行为，这是建立六角铁氧体中的磁电效应所必需的。由硬磁化曲线得到了磁相图。由于磁螺旋线的限制长度尺度的磁尺寸效应解释了薄膜和大块之间的磁性质的差异。
Thin films of the M-type hexaferrite, BaFe10.2Sc1.8O19, have been grown on Al2O3 (00.1) substrates by pulsed laser deposition. Post-deposition annealing improves the structural quality and produces completely relaxed thin films. The post-annealed films show magnetic behavior corresponding to a conical magnetic structure, which is required to establish the magnetoelectric effect in hexaferrites. The magnetic phase diagram has been obtained from hard magnetization curves. Finite-size effects due to the restricted length scale of the magnetic helix explain differences in magnetic properties between thin films and the bulk.