Thermal conductivity and phonon scattering mechanisms in La{sub 2-X}M{sub X}CuO{sub 4}
Journal Article
·
· Journal of Low Temperature Physics
- Iwate Univ., Morioka (Japan); and others
The thermal conductivity k of high density La{sub 2{minus}x}M{sub x}CuO{sub 4} (M=Ba, Sr) sintered materials was measured between 15K and 150K for the various concentrations of Ba and the phonon thermal conductivity was analyzed comparing with that of Nd{sub 2{minus}x}Ce{sub x}CuO{sub 4}. The pretty large k value for pure La{sub 2}CuO{sub 4} was drastically diminished by substituting La by a small amount of Ba atoms especially at low temperatures. It was found that a new type of the phonon scattering center such as a two-level tunneling must be taken account of in order to explain the observed K reduction.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 457264
- Report Number(s):
- CONF-960808--
- Journal Information:
- Journal of Low Temperature Physics, Journal Name: Journal of Low Temperature Physics Journal Issue: 3-4 Vol. 105; ISSN 0022-2291; ISSN JLTPAC
- Country of Publication:
- United States
- Language:
- English
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· Int. J. Thermophys.; (United States)
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