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The Gd-based amorphous/nanocrystal composite is prepared by controlling the cooling rate and the element ratio. The X-ray diffraction, differential scanning calorimeter and atomic force microscope/magnetic force microscope are used to confirm the composite microstructures from different perspectives. The magnetic test shows the great enhancement of magnetocaloric effect in the metallic glassy composite. The large magnetic refrigerant capacity (RC) up to 103 J. kg-1 is more than double the RC values of the Gd-based bulk metallic glass and pure Gd. The full width at half maximum of the magnetic entropy change (Sm) peak almost spreads over the whole low-temperature range, which is five times wider than that of the pure Gd. The maximum Sm approaches a nearly constant value in a wide temperature span (over 80 K). The super paramagnetic nanoclusters of the composite increase the magnetic refrigerant capacity greatly. In combination with the low magnetic hysteresis and large resistance, the metallic glass composite may be a potential candidate for the ideal Ericsson-cycle magnetic refrigeration.
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Keywords:
- amorphous /
- magnetiocaloric effect /
- nanocrystals
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[1] Zhang H L, Li Z, Qiao Y F, Cao S X, Zhang J C, Jing C 2009 ActaPhys. Sin. 58 7857 (in Chinese) [张浩雷,李哲, 乔燕飞, 曹世勋, 张金仓, 敬超 2009 物理学报 58 7857]
[2] Liu Z H, Hu F X, Wang W H, Chen J L, Wu G H, Gao S X, Ao L2001 Acta Phys. Sin. 50 233 (in Chinese)[柳祝红,胡风霞, 王文洪, 陈京兰, 吴光恒, 高书侠, 敖玲 2001 物理学报 50 233]
[3] Jing C, Chen J P, Li Z, Cao S X, Zhang J C 2008 Acta Phys. Sin.57 4450 (in Chinese)[敬超, 陈继萍, 李哲,曹世勋, 张金仓 2008 物理学报 57 4450]
[4] Chen W, Zhong W, Pan C F, Chang H, Du Y W 2001 Acta Phys.Sin. 50 319 (in Chinese) [陈伟, 钟伟, 潘成福, 常虹,都有为 2001 物理学报 50 319]
[5] Luo Q, Zhao D Q, Pan M X,WangWH 2006 Appl. Phys. Lett. 89081914
[6] Luo Q, Zhao D Q, Pan M X,WangWH 2007 Appl. Phys. Lett. 90211903
[7] Zhang X Y, Fu H, Zu X T, Yu H J 2009 Rare Metal Materials andEngineering 38 431 (in Chinese) [张晓艳, 付浩, 祖小涛,余华军 2009 稀有金属材料与工程 38 431]
[8] Tang P F, Zhong X C, Zheng Z G, Yu H Y, Qiu W Q, Liu Z W,Ceng D C 2011 J. Magn. Mater. Dev. 42 12 [唐鹏飞,钟喜春, 郑志刚, 余红雅, 邱万奇, 刘仲武, 曾德长 2011磁性材料及器件 42 12]
[9] Xu Z Y, Hui X, Wang E R, Chang J, Chen G L 2010 J. AlloysComp. 504 S146
[10] Zheng Z G, Zhong X C, Su K P, Yu H Y, Liu ZW, Zeng D C 2011Sci. China Phys. Mechanics & Astronomy 54 1267
[11] Kong H Z, Ding J, Dong Z J 2000 J. Phys. D 35 423
[12] Chen D, Takeuchi A, Inoue A. 2007 J. Alloys Comp. 440 199
[13] Wei B C, Zhang Y, Zhuang Y X, Zhao D Q, Pan M X, Wang W H2000 J. Appl. Phys. 89 3529
[14] Yano K, Akiyama Y, Tokumitsu K, Kita E, Ino H 2000 J. Magn.Magn. Mater. 214 217
[15] Provenzano V, Shapiro A J, Shull R D 2004 Nature 429 853
[16] Tegus O, Bruck E, Buschow K H J, de Boer F R 2002 Nature 415150
[17] Gomesa A M, Proveti J R, Takeuchi A Y, Passamani E C, LaricaC, Guimaraes A P 2006 J. Appl. Phys. 99 116107
[18] Hashimoto T, Kuzuhara T, Matsumoto K, Sahashi M, Imonata K,Tomokiyo A, Yayama H 1987 IEEE Trans. Mag. 23 2847
[19] Smaili A, Chahine R 1997 J. Appl. Phys. 81 824
[20] Gorsse S, Chevalier B, Orveillon G 2008 Appl. Phys. Lett. 92122501
[21] Shao Y Z, Xiong Z Y, Zhang J L, Zhang J X 1996 Acta Phys. Sin.45 1749 (in Chinese)[邵元智, 熊正烨, 张介立, 张进修1996 物理学报 45 1749]
[22] McMichael R D, Ritter J J, Shull R D 1993 J. Appl. Phys. 736946
[23] Bennett L H, McMichael R D, Swartzendruber L J, Shull R D1992 J. Magn. Magn. Mater. 104 1094
[24] Shull R D, McMichael R D, Ritter J J 1993 Nanostruct. Mater. 2205
[25] Hou X L, Zhou B X, Xu H, Ni J S, Kong J F, Zhang S J 2006 RareMetal Mate Eng. 35 749 (in Chinese)[侯雪玲,周邦新, 徐晖, 倪建森, 孔俊峰, 张少杰 2006 稀有金属材料与工程 35 749]
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