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

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

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.

Keywords: metallic glasses Boson peak specific heat

Received: 23 June 2009
Revised: 04 July 2009
Accepted manuscript online:

PACS:	61.43.Fs	(Glasses)
	65.60.+a	(Thermal properties of amorphous solids and glasses: heat capacity, thermal expansion, etc.)
	71.23.Cq	(Amorphous semiconductors, metallic glasses, glasses)

Fund: 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).

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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 2010 Chin. Phys. B 19 017102

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

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