MAGNETIC AND STRUCTURAL CHARACTERISTICS OF AMORPHOUS AND CRYSTALLINE ALPHA-AL2O3 HIGH T-C SUPERCONDUCTORS

Authors
POP I OPREA C BURDA I POP O
Citation
I. Pop et al., MAGNETIC AND STRUCTURAL CHARACTERISTICS OF AMORPHOUS AND CRYSTALLINE ALPHA-AL2O3 HIGH T-C SUPERCONDUCTORS, Modern physics letters B, 11(8), 1997, pp. 353-357
Citations number
3
Categorie Soggetti
Physics, Applied","Physics, Condensed Matter","Physycs, Mathematical
Journal title
Modern physics letters B → ACNP
ISSN journal
02179849
Volume
11
Issue
8
Year of publication
1997
Pages
353 - 357
Database
ISI
SICI code
0217-9849(1997)11:8<353:MASCOA>2.0.ZU;2-G
Abstract
The amorphous and crystalline alpha-Al2O3 oxides were investigated fro m magnetic and structural point of view. The temperature dependence of the magnetic susceptibility experiences double diamagnetic transition . First diamagnetic-paramagnetic transition is connected with the supe rconduct or-paramagnet ic transition, and the second is connected with the diamagnetic-normal state transition of alpha-Al2O3-amorphous and crystalline phase. The crystalline alpha-Al2O3 phase has the critical temperature T-c(chi = 0) = 78 K and amorphous phase has the critical t emperature much higher temperature T-c(chi = 0) = 144 K.