Preparation and magnetic properties of (Zn-Sn) substituted barium hexaferrite nanoparticles for magnetic recording
Preparation and magnetic properties of (Zn-Sn) substituted barium hexaferrite nanoparticles for magnetic recording
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DOI：
10.1016/s0304-8853(98)00139-5
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发表时间：
1998-08-01
影响因子：
2.7
通讯作者：
Wang, CS
中科院分区：
文献类型：
--
作者：
Fang, HC;Yang, Z;Wang, CS
首次采用化学共沉淀法制备了0 ≤ x ≤ 1.1的Zn-Sn取代钡铁氧体BaFe（12-2x）Zn（x）Sn（x）O（19）。用X射线衍射仪（XRD）和透射电子显微镜（TEM）对产物的结构和形貌进行了表征。磁性能已被测量使用振动样品磁强计（VSM）与施加的磁场高达80千奥斯特。利用趋近饱和定律确定了比饱和磁化强度M（s），并估算了有效各向异性场H（a）和各向异性常数K（1）。发现通过改变x而不显著降低饱和磁化强度，可以有效地减小颗粒尺寸并且容易地控制磁化强度H（c）。特别地，x = 0.7-1.1的BaFe（12-2x）Zn（x）Sn（x）O（19）具有合适的磁特性和足够小的颗粒尺寸以用于高密度磁记录。(C)1998 Elsevier Science B. V.保留所有权利。
Zn-Sn substituted barium ferrite particles BaFe(12-2x)Zn(x)Sn(x)O(19) with 0 less than or equal to x less than or equal to 1.1 have been prepared by a chemical co-precipitation method for the first time. X-ray diffraction (XRD) and transition electron microscopy (TEM) have been carried out to determine the particle structure and morphology. Magnetic properties have been measured using a vibrating sample magnetometer (VSM) with an applied field up to 80 kOe. The specific saturation magnetization M(s) was determined using the law of approach to saturation, and the effective anisotropy field H(a) and anisotropy constant K(1), were also estimated. It was found that the particle size could be effectively decreased and coercivity H(c) easily controlled, by varying x without significantly decreasing saturation magnetization. In particular, BaFe(12-2x)Zn(x)Sn(x)O(19) with x = 0.7-1.1 has suitable magnetic characteristics and a particle size small enough for high-density magnetic recording. (C) 1998 Elsevier Science B.V. All rights reserved.