Boson peak in Sm-Al-Co ternary metallic glasses and its possible structural origin

doi:10.1088/1674-1056/19/1/017102

中国物理B ›› 2010, Vol. 19 ›› Issue (1): 17102-017102.doi: 10.1088/1674-1056/19/1/017102

Boson peak in Sm-Al-Co ternary metallic glasses and its possible structural origin

刘慧美¹, 陆成亮¹, 王克锋², 刘俊明², 王清³, 董闯³

(1)Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China; (2)Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China;International Centre for Materials Physics, Chinese Academy of Sciences, Shenyang 110016, China; (3)State Key Laboratory of Materials Modification, Dalian University of Technology, Dalian 116024, China

收稿日期:2009-06-23 修回日期:2009-07-04 出版日期:2010-01-15 发布日期:2010-01-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 50601013, 10674061 and 50832002) and the National Basic Research Program of China (Grant No. 2006CB921802).

Boson peak in Sm-Al-Co ternary metallic glasses and its possible structural origin

Liu Hui-Mei(刘慧美)^a), Lu Cheng-Liang(陆成亮)^a), Wang Ke-Feng(王克锋)^a)b), Liu Jun-Ming(刘俊明)^a)b)†, Wang Qing(王清)^c), and Dong Chuang(董闯)^c)

^a Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China; ^b International Centre for Materials Physics, Chinese Academy of Sciences, Shenyang 110016, China; ^c State Key Laboratory of Materials Modification, Dalian University of Technology, Dalian 116024, China

Received:2009-06-23 Revised:2009-07-04 Online:2010-01-15 Published:2010-01-15
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 50601013, 10674061 and 50832002) and the National Basic Research Program of China (Grant No. 2006CB921802).

摘要/Abstract

摘要： The low temperature specific heat of Sm-Al-Co ternary metallic glasses is investigated and a clear anomaly associated with the Boson peak is identified. While this anomaly depends slightly on the chemical composition, it has no dependence on external magnetic field. To figure out the mechanism of the Boson peak, we interpret the data within various model frameworks. Unlike earlier work, our study shows that this Boson peak is mainly ascribed to an additional T² term of the specific heat, which may originate from the quasi-two-dimensional and short-range ordered structure units possibly existing in the metallic glasses.

Abstract: The low temperature specific heat of Sm-Al-Co ternary metallic glasses is investigated and a clear anomaly associated with the Boson peak is identified. While this anomaly depends slightly on the chemical composition, it has no dependence on external magnetic field. To figure out the mechanism of the Boson peak, we interpret the data within various model frameworks. Unlike earlier work, our study shows that this Boson peak is mainly ascribed to an additional T² term of the specific heat, which may originate from the quasi-two-dimensional and short-range ordered structure units possibly existing in the metallic glasses.

Key words: metallic glasses, Boson peak, specific heat

中图分类号: (Glasses)

61.43.Fs

65.60.+a (Thermal properties of amorphous solids and glasses: heat capacity, thermal expansion, etc.) 71.23.Cq (Amorphous semiconductors, metallic glasses, glasses)

刘慧美, 陆成亮, 王克锋, 刘俊明, 王清, 董闯. Boson peak in Sm-Al-Co ternary metallic glasses and its possible structural origin[J]. 中国物理B, 2010, 19(1): 17102-017102.

Liu Hui-Mei(刘慧美), Lu Cheng-Liang(陆成亮), Wang Ke-Feng(王克锋), Liu Jun-Ming(刘俊明), Wang Qing(王清), and Dong Chuang(董闯) . Boson peak in Sm-Al-Co ternary metallic glasses and its possible structural origin[J]. Chin. Phys. B, 2010, 19(1): 17102-017102.

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Boson peak in Sm-Al-Co ternary metallic glasses and its possible structural origin

Boson peak in Sm-Al-Co ternary metallic glasses and its possible structural origin

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