Large Faraday effect in a short wavelength range for disordered zinc ferrite thin films
Large Faraday effect in a short wavelength range for disordered zinc ferrite thin films
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DOI：
10.1063/1.2199727
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发表时间：
2006-05
影响因子：
3.2
通讯作者：
Katsuhisa Tanaka;S. Nakashima;K. Fujita;K. Hirao
中科院分区：
文献类型：
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作者：
Katsuhisa Tanaka;S. Nakashima;K. Fujita;K. Hirao
采用射频溅射法制备了一层85nm厚的锌铁氧体（ZnF2O4）薄膜。法拉第效应的测量不仅适用于沉积薄膜，也适用于退火薄膜。300℃退火后的薄膜和沉积后的薄膜在390nm左右的波长处具有较大的法拉第旋转角。其中，300℃退火的薄膜表现出最大的法拉第效应；在386nm波长处，旋转角度为1.65°∕μm。1.08μm厚的薄膜在室温下表现出较大的磁化强度，且磁化强度与外加磁场的关系表明薄膜具有铁磁性。
We have prepared a zinc ferrite (ZnF2O4) thin film 85nm thick deposited on a silica glass substrate by using a radio frequency sputtering method. Faraday effect measurements have been carried out not only for as-deposited but also for annealed thin films. The thin film annealed at 300°C as well as the as-deposited thin film exhibit a large Faraday rotation angle at a wavelength of around 390nm. In particular, the thin film annealed at 300°C manifests the largest Faraday effect among the present thin films; the rotation angle of 1.65°∕μm is attained at a wavelength of 386nm. The thin films 1.08μm thick exhibit a large magnetization at room temperature, and the dependence of the magnetization on the external magnetic field is suggestive of a ferrimagnetic behavior.