Influence of extra La and annealing temperature on microstructure and magnetocaloric properties of La-Fe-Co-Si alloys

被引：15
作者：
Zhang, Zhongtian [1 ,2 ,3 ]
He, Chun [1 ,2 ]
Zhang, Mingxiao [1 ,2 ]
Liu, Jian [1 ,2 ]
机构：
[1] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Key Lab Magnet Mat & Devices, Ningbo 315201, Zhejiang, Peoples R China
[2] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Zhejiang Prov Key Lab Magnet Mat & Applicat Techn, Ningbo 315201, Zhejiang, Peoples R China
[3] Univ Sci & Technol China, Nano Sci & Technol Inst, Suzhou 215123, Peoples R China
来源：
PHYSICA B-CONDENSED MATTER | 2015年 / 476卷
基金：
中国国家自然科学基金;
关键词：
Non-stoichiometric La-Fe-Co-Si alloys; Magnetic entropy change; Microstructure; METAMAGNETIC TRANSITION; ENTROPY CHANGE;
D O I：
10.1016/j.physb.2015.03.012
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The microstructure, phase constitution and magnetocaloric properties of non-stoichiometric La1.7Fe11Co0.8Si1.2 alloys were investigated. Compared with stoichiometric La(Fe,Co,Si)(13) alloys, a complex phase, including La(Fe,Co,Si)(13) phase, La5Si3 phase, La(Fe,Co)Si phase, alpha-Fe phase and La oxide, can rapidly form upon annealing at 1323 K for 24 h in the present alloy. The resulting alloy exhibits a large magnetic entropy change of 7.5 J kg(-1) K-1 at 271 K in a magnetic field change of 2 T. In addition, the annealed La1.7Fe11Co0.8Si1.2 alloy shows a reversible magnetic phase transition with zero hysteresis. These characteristics indicate that the present La-rich La-Fe-Co-Si compounds have potential for the applications as ambient magnetic refrigeration materials. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：167 / 170
页数：4
相关论文
共 14 条
  • [1] Direct measurement of the magnetocaloric effect on La(Fe13-x-yCoy)Six compounds near room temperature
    Balli, M.
    Fruchart, D.
    Sari, O.
    Gignoux, D.
    Huang, J. H.
    Hu, J.
    Egolf, P. W.
    [J]. JOURNAL OF APPLIED PHYSICS, 2009, 106 (02)
  • [2] Chen X., 2002, J B MAT SCI, V35, P175
  • [3] High-temperature phase transition and magnetic property of LaFe11.6Si1.4 compound
    Chen, Xiang
    Chen, Yungui
    Tang, Yongbo
    [J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2011, 509 (34) : 8534 - 8541
  • [4] Itinerant-electron metamagnetic transition and large magnetocaloric effects in La(FexSi1-x)13 compounds and their hydrides -: art. no. 104416
    Fujita, A
    Fujieda, S
    Hasegawa, Y
    Fukamichi, K
    [J]. PHYSICAL REVIEW B, 2003, 67 (10)
  • [5] Active magnetic regeneration behavior of spherical hydrogenated La(Fe0.86Si0.14)13 fabricated by rotating electrode process
    Fujita, Asaya
    Koiwai, Sadayoshi
    Fujieda, Shun
    Fukamichi, Kazuaki
    Kobayashi, Tadahiko
    Tsuji, Hideyuki
    Kaji, Shiori
    Saito, Akiko Takahashi
    [J]. JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, 2007, 46 (8-11): : L154 - L156
  • [6] Magnetocaloric effect in itinerant electron metamagnetic systems La(Fe1-xCox)11.9Si1.1 -: art. no. 10M303
    Hu, FX
    Gao, J
    Qian, XL
    Ilyn, M
    Tishin, AM
    Sun, JR
    Shen, BG
    [J]. JOURNAL OF APPLIED PHYSICS, 2005, 97 (10)
  • [7] Influence of negative lattice expansion and metamagnetic transition on magnetic entropy change in the compound LaFe11.4Si1.6
    Hu, FX
    Shen, BG
    Sun, JR
    Cheng, ZH
    Rao, GH
    Zhang, XX
    [J]. APPLIED PHYSICS LETTERS, 2001, 78 (23) : 3675 - 3677
  • [8] Systematic study of the microstructure, entropy change and adiabatic temperature change in optimized La-Fe-Si alloys
    Liu, Jian
    Krautz, Maria
    Skokov, Konstantin
    Woodcock, Thomas George
    Gutfleisch, Oliver
    [J]. ACTA MATERIALIA, 2011, 59 (09) : 3602 - 3611
  • [9] Phase formation and structure in rapidly quenched La(Fe0.88Co0.12)13-xSix alloys
    Liu, XB
    Liu, XD
    Altounian, Z
    Tu, GH
    [J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2005, 397 (1-2) : 120 - 125
  • [10] Magnetic and magnetocaloric properties of La(Fe,Co)11.4SP1.6 compounds (SP = Al or Si)
    Passamani, E. C.
    Larica, C.
    Proveti, J. R.
    Takeuchi, A. Y.
    Gomes, A. M.
    Ghivelder, L.
    [J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2007, 312 (01) : 65 - 71
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