Boson peak in Sm-Al-Co ternary metallic glasses and its possible structural origin |
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| Authors: | Liu Hui-Mei Lu Cheng-Liang WangKe-Feng Liu Jun-Ming Wang Qing and Dong Chuang |
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| Affiliation: | Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China; International Centre for Materials Physics, Chinese Academy of Sciences, Shenyang 110016, China; State Key Laboratory of Materials Modification, Dalian University of Technology, Dalian 116024, China |
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| 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. |
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| Keywords: | metallic glasses Boson peak specific heat |
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