中国物理B ›› 2015, Vol. 24 ›› Issue (4): 47503-047503.doi: 10.1088/1674-1056/24/4/047503
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
李文春a, 左亚路b, 刘晓虹a, 魏清清a, 周雪云c, 姚东升a
Li Wen-Chun (李文春)a, Zuo Ya-Lu (左亚路)b, Liu Xiao-Hong (刘晓虹)a, Wei Qing-Qing (魏清清)a, Zhou Xue-Yun (周雪云)c, Yao Dong-Sheng (姚东升)a
摘要:
The effect of the volume fraction of ferromagnetic metal (x) in (Ni75Fe25)x(ZnO)1-x nanogranular thin films on microstructural, soft-magnetic, and high-frequency properties was investigated. Good soft-magnetic properties were obtained in a broad x range, with 0.55 < x < 0.82. High resolution transmission electron microscopy (HRTEM) observations reveal that the grain size of the samples is lower than 14 nm, and that it decreases with decreasing x. Of special interest, our investigation of the permeability spectra indicates that these films exhibit an adjustable frequency linewidth of resonance peak, dependant upon changing x. Correspondingly, large and adjustable damping coefficients (αeff) from 0.023 to 0.043 were achieved by decreasing x from 0.82 to 0.55. Combined with the HRTEM results, the variation of αeff with x was analyzed in detail.
中图分类号: (Magnetic properties of monolayers and thin films)