Effect of film thickness on magnetic properties of Cr/SmCo/Cr films
来源期刊：Journal of Rare Earths2012年第5期
论文作者：李宁 李宝河 冯春 李明华 于广华
文章页码：446 - 449
摘 要：Cr/SmCo/Cr films with different SmCo thickness were deposited on glass substrates by magnetron sputtering,followed by an annealing process at 550 °C for 20 min.Experimental results showed that the SmCo film of 30 nm exhibited two-phase behavior in the demagnetization process,the obvious kink was observed near zero.For the SmCo film of 50 nm,the kink was invisible,and a single phase like behavior was obtained in the demagnetization process.The reversal behavior became consistent in the thicker films.Moreover,the coercivity reduced and the saturated magnetization increased obviously with the increasing thickness.X-ray diffraction results indicated that the average grain size of SmCo 5 in the thicker films were almost 30 nm,but the quantity of SmCo 5 grains increased with the increasing thickness,which enhanced the intergrain exchange coupling（IEC） of the SmCo 5 hard phases.The increase of IEC improved the magnetic properties of SmCo films with increasing thickness.
李宁1，李宝河2，冯春1，李明华1，于广华1
1. Department of Materials Physics and Chemistry,University of Science and Technology Beijing2. Department of Physics,Beijing Technology and Business University
摘 要：Cr/SmCo/Cr films with different SmCo thickness were deposited on glass substrates by magnetron sputtering,followed by an annealing process at 550 °C for 20 min.Experimental results showed that the SmCo film of 30 nm exhibited two-phase behavior in the demagnetization process,the obvious kink was observed near zero.For the SmCo film of 50 nm,the kink was invisible,and a single phase like behavior was obtained in the demagnetization process.The reversal behavior became consistent in the thicker films.Moreover,the coercivity reduced and the saturated magnetization increased obviously with the increasing thickness.X-ray diffraction results indicated that the average grain size of SmCo 5 in the thicker films were almost 30 nm,but the quantity of SmCo 5 grains increased with the increasing thickness,which enhanced the intergrain exchange coupling（IEC） of the SmCo 5 hard phases.The increase of IEC improved the magnetic properties of SmCo films with increasing thickness.
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