La2-xNdxCuO4+δ(0.1≤x≤1.2)体系中滞弹性弛豫与相变内耗研究

何庆; 杨春利; 吴修胜; 陈志军; 陈初升; 刘卫

doi:10.7498/aps.59.7979

摘要

通过对La2-xNdxCuO4+δ(0.1≤x≤1.2)体系中滞弹性弛豫与相变内耗性能的研究发现,当0.1≤x≤1.0时,在250K左右存在一个与间隙氧有关的弛豫内耗峰,并且当0.1≤x≤0.4时,弛豫内耗峰峰高随着x值的增大而升高,此时体系为正交结构;当0.5≤x≤1.0时,体系在宏观上呈现四方结构,此时内耗峰峰高随着x<

关键词:

The low-frequency internal frictions of La2-xNdi>xCuO4+δ(0.1≤x≤1.2) compounds are measured. The results show that the relaxation internal friction peak related to the excess oxygen atoms appears around 250K with 0.1≤x≤1.0.And the peak becomes higher with the value of x increasing for 0.1≤x≤0.4 and all these compounds have orthorhombic structures. When 0.5≤x≤1.0, the compounds have all tetragonal structures on a macro scale and the peak reduces as the value of x increases. However, the sample with x=1.2 exhibits tetragonal structure but the relaxation internal friction peak is not found. Further more, when 0.1≤x≤0.8, there exists a phase transition internal friction peak around 550K. The transition temperature shifts toward high temperature zone as the value of x increases and relative shear modulus M is enlarged. But for x=1.0 and 1.2, there appears no phase transition internal friction peak in the measurement range. We find that all these phase transition internal friction peaks are related to the transition between the orthorhombic structure and the tetragonal structure.

Keywords:

作者及机构信息

(1)安徽建筑工业学院先进建筑材料安徽省重点实验室,合肥230022; (2)中国科学技术大学先进功能材料与器件实验室,合肥 230026

基金项目: 国家自然科学基金(批准号:10574123,50332040)和安徽建筑工业学院硕博启动基金(批准号:2008)资助的课题.

Authors and contacts

(1)Department of Materials Science and Engineering, Anhui Institute of Archtecture and Indusstry, Hefei 230026, China; (2)Laboratory of Advanced Functional Materials and Devices, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230022,China

参考文献

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施引文献

[1]	Rial C, Morán E, Alario-Franco M A, Amador U, Andersen N H 1997 Physica C 288 91
[2]	Wilhelm H, Cros C, Reny E,Demazeau G, Hanfland M 2000 J. Solid. State. Chem. 151 231
[3]	Zhang H L, Liu W, Li D C, Wu X S, Chen C S 2004 Acta. Phys. Sin. 53 3834 (in Chinese) [张华力、刘卫、李栋才、吴修胜、陈初升 2004 53 3834]
[4]	Yang C L, Wu X S, Chen Z J, Gao H Y, Liu W 2009 Mat. Sci. Eng. B-Solid.163 40
[5]	Nowick A S, Berry B S 1972 Anelastic relaxation in crystalline solids (Academic Press New York)
[6]	Shen H M, Xu Z R, Zhu J S, Yang Z J, Wang Y N 1982 Acta. Phys. Sin. 31 1449 (in Chinese) [沈惠敏、许自然、朱劲松、杨照金、王业宁 1982 31 1449]
[7]	Fang Q F, Ge T S 1993 Acta. Phys. Sin. 42 458 (in Chinese) [方前锋、葛庭燧 1993 42 458]
[8]	Fang Q F 1997 Acta. Phys. Sin. 46 536 (in Chinese) [方前锋1997 46 536]
[9]	Liang Y F, Shui J P, Chen G, Zhu Z G 2000 Acta. Phys. Sin. 49 105 (in Chinese) [梁云峰、水嘉鹏、陈刚、朱震刚 2000 49 105]
[10]	Wang Q Z, Lu D M, Cui C X, Han F S 2008 Acta. Phys. Sin. 57 7083 (in Chinese) [王清周、陆东梅、崔春翔、韩福生 2008 57 7083] 〖11] Sugai S, Adachi T, Sugiura K, Takahashi T, Obara K, Takayanagi Y, Koike Y 2009 J. Supercond. Nov. Magn.22 313
[11]	Matsuda M, Hiraka H, Fujita M, Ohta S, Wakimoto S, Yamada K 2008 J. Phys. Chem. Solids. 69 3181
[12]	Fujita M, Goka H, Adachi T, Koile Y, Yamada K 2005 Physica C 431 257
[13]	Pletnev R N, Yurieva é I, Verkhovskii S V, Bazuev G V 2005 J. Struct. Chem. 59 46
[14]	Odier P, Municken M, Crespin M, Dubois F, Mouron P, Choisnet J 2002 J. Mater. Chem. 12 1370
[15]	Chen Z J 2009 MS Thesis (Hefei: University of Science and Technology of China) (in Chinese) [陈志军2009 硕士学位论文 (合肥:中国科学技术大学)]
[16]	Liu W, Liu Y, Wen Y T, Qian Y T 1994 Chinese Sci. Bull. 39 222 (in Chinese) [刘卫、刘奕、文亦汀、钱逸泰 1994 科学通报 39 222]
[17]	Zhang H L, Wu X S, Chen C S, Liu W 2005 Phys. Rev. B 71 064422
[18]	Licia M, Robin G W, John A K 2000 J. Mater. Chem. 10 2349
[19]	Cordero F, Grandini C R, Cannelli G 1998 Phys. Rev. B 57 8580

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