脉冲激光沉积制备La0.62Ca0.29K0.09MnO3外延膜及其磁热性能

doi:10.7503/cjcu20130241

高等学校化学学报 ›› 2013, Vol. 34 ›› Issue (9): 2063.doi: 10.7503/cjcu20130241

• 研究论文: 无机化学 • 上一篇下一篇

脉冲激光沉积制备La_0.62Ca_0.29K_0.09MnO₃外延膜及其磁热性能

吴小峰, 黄科科, 侯长民, 葛磊, 初学峰, 王珊, 冯守华

吉林大学无机合成与制备化学国家重点实验室, 化学学院, 长春 130012

收稿日期:2013-03-18 出版日期:2013-09-10 发布日期:2013-08-30
作者简介:冯守华,男,博士,教授,博士生导师,中国科学院院士,主要从事无机化学研究.E-mail:shfeng@mail.jlu.edu.cn
基金资助:
国家自然科学基金(批准号:90922034,21131002,21201075)和高等学校博士学科点专项科研基金(批准号:20110061130005)资助.

Magnetocaloric Effect of La_0.62Ca_0.29K_0.09MnO₃ Epitaxial Film Prepared by Pulsed Laser Deposition

WU Xiao-Feng, HUANG Ke-Ke, HOU Chang-Min, GE Lei, CHU Xue-Feng, WANG Shan, FENG Shou-Hua

State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, China

Received:2013-03-18 Online:2013-09-10 Published:2013-08-30

摘要/Abstract

摘要：

采用脉冲激光沉积法在单晶SrTiO₃(STO)基底上制备了La_0.62Ca_0.29K_0.09MnO₃(LCKMO)薄膜, 通过调控基底温度获得了平整致密的膜层. 利用二维面探X射线衍射仪和高分辨透射电子显微镜对薄膜结构进行了表征. 结果表明, 薄膜呈高质量取向外延生长, 对应关系为{001}LCKMO||{001}STO. 对薄膜的磁热性能研究表明, 5 T下最大磁熵变为3.45 J/(kg·K), 相对制冷效率为379.5 J/kg, 磁熵半峰宽为110 K.

关键词: 磁热效应, 外延膜, 脉冲激光沉积, 锰酸盐

Abstract:

La_0.62Ca_0.29K_0.09MnO₃(LCKMO) film was epitaxially grown on the (001) SrTiO₃(STO) single crystal substrate by pulsed laser deposition and a smooth and dense film was obtained by controlling the substrate temperature. The structure was characterized by 2D X-ray area detector and high resolution transmission electron microscopy, and the results indicate a high quality oriented growth of the film with the relationship of {001}LCKMO||{001}STO. At the magnetic field of 5 T, the maximum magnetic entropy change and relative cooling power of the film is 3.45 J/(kg·K) and 379.5 J/kg, respectively. A notable case is that the full width at half maximum of |ΔS_M| is 110 K, which is desirable for the Ericsson cycle, the excellent magneto caloric effect of the LCKMO film reveals its great applicative potentialities as magnetic cooling refrigerant.

Key words: Magnetocaloric effect, Epitaxial film, Pulsed laser deposition, Manganite

中图分类号:

O611.3

TrendMD:

吴小峰, 黄科科, 侯长民, 葛磊, 初学峰, 王珊, 冯守华. 脉冲激光沉积制备La_0.62Ca_0.29K_0.09MnO₃外延膜及其磁热性能. 高等学校化学学报, 2013, 34(9): 2063.

WU Xiao-Feng, HUANG Ke-Ke, HOU Chang-Min, GE Lei, CHU Xue-Feng, WANG Shan, FENG Shou-Hua. Magnetocaloric Effect of La_0.62Ca_0.29K_0.09MnO₃ Epitaxial Film Prepared by Pulsed Laser Deposition. Chem. J. Chinese Universities, 2013, 34(9): 2063.

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脉冲激光沉积制备La_0.62Ca_0.29K_0.09MnO₃外延膜及其磁热性能

Magnetocaloric Effect of La_0.62Ca_0.29K_0.09MnO₃ Epitaxial Film Prepared by Pulsed Laser Deposition

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