HIGH-TEMPERATURE LARGE DIAMAGNETISM IN BALL-MILLED SR0.6CA0.4CUO2

Authors
HERNANDO A HERRERO E VASQUEZ M ALONSO J GONZALEZ A RIVERO G ROJO JM VALLETREGI M CALBET JG
Citation
A. Hernando et al., HIGH-TEMPERATURE LARGE DIAMAGNETISM IN BALL-MILLED SR0.6CA0.4CUO2, Physical review. B, Condensed matter, 56(13), 1997, pp. 7800-7803
Citations number
22
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
56
Issue
13
Year of publication
1997
Pages
7800 - 7803
Database
ISI
SICI code
0163-1829(1997)56:13<7800:HLDIBS>2.0.ZU;2-T
Abstract
The observation of a large effective diamagnetic susceptibility of -3. 4 X 10(-6) emu g(-1) Oe(-1) up to temperatures above 1000 K in highly deformed ball-milled Sr0.6Ca0.4CuO2 is reported. These samples do not exhibit superconductivity at low temperature. This anomalously strong diamagnetism increases with milling time and reaches a maximum value a fter 500 h of milling. A model is proposed in which excess holes, intr oduced during milling, have wave functions that are extended over the CuO2 planes of the crystallites, resulting in large values of the diam agnetic susceptibility.