Influence of substrate type on the property of nickle-zinc ferrite thin films

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• 作者：Ke Sun^a ; ^{ksun@uestc.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; ^{shmily811028@126.com" class="auth_mail" title="E-mail the corresponding author} ; Yue Dai^a ; Yan Yang^b ; Zhong Yu^a ; Hai Liu^a ; Xiaona Jiang^a ; Zhongwen Lan^a
• 关键词：NiZn ferrite thin film ; Magnetron sputtering ; Substrate type ; Surface morphology ; Magnetic property
• 刊名：Ceramics International
• 出版年：2016
• 出版时间：1 February 2016
• 年：2016
• 卷：42
• 期：2
• 页码：3028-3032
• 全文大小：808 K

文摘

Ni_0.45Zn_0.5Mn_0.05Fe₂O₄ ferrite thin films (NZFs) were deposited on different substrates [Si(100), Si(111) and MgAl₂O₄(100)] by radio frequency (RF) magnetron sputtering method. The phase structure, surface morphology and magnetic property of NZFs were investigated using the X-ray diffractometer (XRD), atomic force microscopy (AFM) and vibrating sample magnetometer (VSM), respectively. All the NZFs deposited on three kinds of substrates possess spinel structure, while only the film deposited on MgAl₂O₄(100) substrate [NZF/MgAl₂O₄(100)] has a preferred orientation along the direction of (100) because of the strong inducing effect of substrate. NZF/MgAl₂O₄(100) owns smoother surface than that of the film deposited on Si(111) substrate [NZF/Si(111)]. However, NZF/MgAl₂O₄(100) possesses larger grain size and much inhomogeneous distribution of grain size than that of NZF/Si(111). NZF/MgAl₂O₄(100) has the greatest saturation magnetization (M_s) of 345 kA/m and coercivity (H_c) of 5.80 kA/m. According to the stress model, the coercivity of NZFs deposited on various substrates has been calculated and discussed, which matches with the experiment results.