Large room temperature magnetization in nanocrystalline zinc ferrite thin films
Large room temperature magnetization in nanocrystalline zinc ferrite thin films
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DOI：
10.1063/1.2217253
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发表时间：
2006-06-26
影响因子：
4
通讯作者：
Krishnan, R.
中科院分区：
文献类型：
--
作者：
Bohra, Murtaza;Prasad, Shiva;Krishnan, R.
采用脉冲激光烧蚀（PLA）和射频溅射法在熔融石英衬底上沉积了铁酸锌薄膜。X射线衍射分析表明，薄膜均为单相ZnFe_2 O_4，晶粒尺寸在8-80 nm范围内随衬底温度的升高而增大。纳米晶薄膜被发现是磁性的，自发磁化强度表现出很强的晶粒尺寸的依赖性，急剧下降的薄膜具有较大的晶粒。在500摄氏度真空沉积的聚乳酸薄膜的室温磁化强度值为5560 G。(c)2006年，美国物理学会。
Zinc ferrite films were deposited on fused quartz substrate at different temperatures using pulsed laser ablation (PLA) and rf sputtering. X-ray diffraction indicated that all the films were single phase ZnFe2O4 with grain growing in the range of 8-80 nm with substrate temperature. The nanocrystalline films were found to be magnetic and the spontaneous magnetization showed a strong dependence on the grain size, dropping sharply for films with larger grains. A PLA thin film deposited in vacuum at 500 degrees C exhibited a room temperature magnetization value of 5560 G. (c) 2006 American Institute of Physics.