(1. 中南大學(xué) 物理科學(xué)與技術(shù)學(xué)院，長沙 410083；
2. 中南大學(xué) 粉末冶金國家重點(diǎn)實(shí)驗(yàn)室，長沙 410083)
摘 要: 采用磁控濺射工藝制備CoNbZrTb納米薄膜，研究了摻雜稀土元素Tb對薄膜軟磁性能、微波磁導(dǎo)率及其頻譜特性的影響。結(jié)果表明：少量Tb 摻雜(＜2%，摩爾分?jǐn)?shù))對該類薄膜的微結(jié)構(gòu)和軟磁性能影響較小，薄膜仍可保持非晶態(tài)結(jié)構(gòu)和良好的軟磁性能，但Tb摻雜可以顯著增強(qiáng)薄膜磁譜的弛豫性，從而影響其微波磁導(dǎo)率和磁損耗；隨Tb 摻雜量的增加，薄膜的磁各向異性場和共振頻率得以有效提高；薄膜樣品在2 GHz處復(fù)磁導(dǎo)率的虛部均大于200。摻雜少量Tb的CoNbZrTb非晶態(tài)納米薄膜在109 Hz微波段具有較高磁損耗，有望在超薄層吸波材料中獲得應(yīng)用。
關(guān)鍵字: Co基納米膜；Tb摻雜；磁各向異性；軟磁性能；微波磁譜
permeability of CoNbZr nanostructural films
（1. School of Physics Science and Technology, Central South University, Changsha 410083, China;
2. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China）
Abstract:CoNbZrTb nanostructural films were synthesized by RF magnetron sputtering. The influences of Tb doping on the soft magnetic capability and microwave complex permeability were investigated. The results show that the microstructure and soft magnetic parameters change little with a little Tb doping, thus, amorphous microstructure and good soft magnetic performance are still kept, but relaxation in the microwave magnetic spectra is strengthened, and the permeability or magnetic loss also change. With increasing Tb content, the magnetic anisotropy field and resonant frequency are improved remarkably. The imaginary part of complex permeability of CoNbZrTb films at 2 GHz are all larger than 200. The nanostructural CoNbZrTb films present large magnetic loss in 109 Hz frequency range. It is possible for these films to be applied in the field of microwave absorption with super thin absorbing layers.
Key words: Co-based nanostructural films; Tb doping; magnetic anisotropy; soft magnetic capability; microwave permeability spectra
