Open AccessANOMALOUS BEHAVIOUR OF THE LOW TEMPERATURE PHONON CONDUCTIVITY OF AN FeMnAl ALLOY
Author(s) -
Yan Shou-Sheng,
Liming Gao,
Wan Jun-Zuo,
Peng Zheng-Wei,
Ying Zhi-Qiang
Publication year - 1985
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.34.809
Subject(s) - condensed matter physics , mean free path , phonon , thermal conductivity , electrical resistivity and conductivity , materials science , electron , alloy , scattering , temperature coefficient , conductivity , physics , optics , composite material , quantum mechanics
Measurements have been made at 4.2-30 K for the thermal conductivity of a poly-crystalline Fe-25Mn-5Al-0.2C sample with negative temperature coefficient of resistivity. It is found that the phonon conductivity is anomalously proportional to T. The suggested explanation is that this phenomenon results from the noneffectiveness of the scattering of phonons by electrons, when electrons have short mean free path caused by addition of Al.