Published 1992
| Version v1
Book
Temperature variation of positron lifetime in YBa2(Cu1-xMx)3O7-y (M: Fe, Ni, Zn)
- 1. Research Center for Advanced Science and Technology, Univ. of Tokyo, Komaba, Meguro-Ku (Japan)
- 2. Dept. of Materials, Nishi Tokyo Univ., Uenohara, Kitatsuru-gun, Yamanashi (Japan)
- 3. National Research Inst. for Metals, Nakameguro, Meguro-ku, Tokyo (Japan)
Description
We have measured the positron lifetime parameters on a series of specimens of YBa2(Cu1-xMx)3O7-y (M:Fe,Ni,Zn) in the temperature range 20-300 K. In pure YBCO, the mean positron lifetime τmean showed a step-like increase in the temperature range 50-100 K and a decrease above 180 K. This variation of τmean can be explained in terms of thermally activated escapes of positrons from two kinds of trapping centers. The iron doping brought the shift of the transition region of τmean toward a higher temperature, while nickel and zinc did not much alter the behavior of τmean. These phenomena are ascribed to variations of the positron-defect binding energy with doping
Additional details
Additional titles
- Augmented title (English)
- YBa_2(Cu_1_-_xFe_x)_3O_7_-_y; YBa_2(Cu_1_-_xNi_x)_3O_7_-_y; YBa_2(Cu_1_-_xZn_x)_3O_7_-_y
Publishing Information
- Publisher
- Trans Tech Publ.
- Imprint Place
- Aedermannsdorf (Switzerland)
- ISBN
- 0-87849-636-X
- Imprint Title
- Positron annihilation. Proceedings
- Imprint Pagination
- 690 p.
- Journal Volume
- 105-110
- Journal Issue
- pt.2
- Series
- Materials science forum.
- Journal Page Range
- p. 1081-1084.
Conference
- Title
- 9. international conference on positron annihilation (ICPA-9).
- Dates
- 26-31 Aug 1991.
- Place
- Szombathely (Hungary).
INIS
- Country of Publication
- Switzerland
- Country of Input or Organization
- Switzerland
- INIS RN
- 24052491
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; S36: MATERIALS SCIENCE;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- ANNIHILATION; BARIUM OXIDES; BINDING ENERGY; COPPER OXIDES; DOPED MATERIALS; HIGH-TC SUPERCONDUCTORS; IRON OXIDES; LIFETIME; NICKEL OXIDES; POSITRONS; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0000-0013 K; TEMPERATURE RANGE 0013-0065 K; TEMPERATURE RANGE 0065-0273 K; TEMPERATURE RANGE 0273-0400 K; TRAPPING; YTTRIUM OXIDES; ZINC OXIDES
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; ANTILEPTONS; ANTIMATTER; ANTIPARTICLES; BARIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; ELEMENTARY PARTICLES; ENERGY; FERMIONS; INTERACTIONS; IRON COMPOUNDS; LEPTONS; MATERIALS; MATTER; NICKEL COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; PARTICLE INTERACTIONS; SUPERCONDUCTORS; TEMPERATURE RANGE; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS; ZINC COMPOUNDS