| Numéro |
J. Phys. Colloques
Volume 42, Numéro C5, Octobre 1981
ICIFUAS-7Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids |
|
|---|---|---|
| Page(s) | C5-757 - C5-761 | |
| DOI | https://doi.org/10.1051/jphyscol:19815117 | |
ICIFUAS-7
Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. Colloques 42 (1981) C5-757-C5-761
DOI: 10.1051/jphyscol:19815117
Research Institute for Iron, Steel and other metals, Tohoku University, Sendai, Japan.
Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. Colloques 42 (1981) C5-757-C5-761
DOI: 10.1051/jphyscol:19815117
AN INTERNAL FRICTION STUDY OF N-H AND O-H PAIRS IN SINGLE CRYSTAL OF NIOBIUM AT LOW TEMPERATURES
R. Hanada, M. Shinohara, Y. Sado et H. KimuraResearch Institute for Iron, Steel and other metals, Tohoku University, Sendai, Japan.
Abstract
A torsional internal friction measurement was performed for Nb single crystals containing N-H and O-H pairs at low temperatures. A clear peak was found at 60K for N-H and 50K for O-H with the measuring frequency of 1 Hz. For N-H, the magnitude of the peak was found to depend on the orientation but the peak temperature does not. The result for N-H is analysed to show that H occupies the third nearest octahedral site to N. For O-H, the results are more complex than for N-H. The temperature dependence of the jump rate of H in a O-H pair is also discussed.