Search

Your search keyword '"THERMAL properties"' showing total 3 results
3 results on '"THERMAL properties"'

1. Microwave impedance of YBa2Cu3O7-δ high-temperature superconductor films in a magnetic field.

Author

V. M.#Pan, D. A.#Luzhbin, A. A.#Kalenyuk, A. L.#Kasatkin, V. A.#Komashko, A. V.#Velichko, and M.#Lancaster

Subjects
*MAGNETIC fields, *TEMPERATURE, *THERMAL properties, *HEAT, *MAGNETICS, *GEOMAGNETISM, *FIELD theory (Physics)
Abstract

The temperature, field, and intensity (amplitude) dependences of the surface impedance of magnetron-sputtered YBa2Cu3O7-δ quasi-single-crystal films on a sapphire substrate with a CeO2 buffer layer were measured. The measurements were performed with a coplanar resonator at 5.25 GHz in a weak constant magnetic field 0

Published
2005
Full Text
View/download PDF

2. Negative thermal expansion of HTSC-type structures: low temperature structure measurements on Eu1+x(Ba1-yRy)2-xCu3O7-d compounds and theoretical treatment.

Author

V. V.#Eremenko, S. B.#Feodosyev, I. A.#Gospodarev, V. A.#Sirenko, M. Yu.#Shvedun, W.#McCallum, and M.#Tovar

Subjects
*TEMPERATURE, *PHYSICAL measurements, *MEASUREMENT, *UNITS of measurement, *HEAT, *THERMAL properties, *PHYSICS
Abstract

The temperature dependences of the lattice parameters are investigated on the perovskite-like structures Eu1+x(Ba1-yRy)2-xCu3O7-d with Ba substitution by light rare earth, using x-ray diffraction techniques. A negative thermal expansion effect is observed and explained in detail. © 2005 American Institute of Physics. [ABSTRACT FROM AUTHOR]

Published
2005
Full Text
View/download PDF

3. Low-temperature deviations from Bloch’s law in BaFe12O19 hexaferrite.

Author

A. A.#Bezlepkin and S. P.#Kuntsevich

Subjects
*TEMPERATURE, *IRON ions, *ELECTRONS, *THERMAL properties, *HEAT, *METAL ions
Abstract

The NMR method is used to study the temperature variations of local fields on 57Fe nuclei in the octahedral positions 12k, 4f2, and 2a of the iron ions in the ferrite BaFe12O19. The possibility of applying Bloch’s spin-wave theory to describe the temperature variations of the local fields on the iron nuclei is examined. Deviations from Bloch’s 3/2 power law are found in the temperature range 4.2–77 K. These deviations cannot be described on the basis of the behavioral characteristics due to the presence of an energy gap in the acoustic magnon spectrum. © 2005 American Institute of Physics. [ABSTRACT FROM AUTHOR]

Published
2005
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results