MICROHARDNESS OF THE COMPOUNDS LA2CUO4 AND LA1.85SR0.15CUO4 AT TEMPERATURES FROM 81 TO 292 K

Authors
FOMENKO LS LUBENETS SV BOBROV VS IZOTOV AN
Citation
Ls. Fomenko et al., MICROHARDNESS OF THE COMPOUNDS LA2CUO4 AND LA1.85SR0.15CUO4 AT TEMPERATURES FROM 81 TO 292 K, Physics of the solid state, 40(3), 1998, pp. 453-457
Citations number
43
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physics of the solid state → ACNP
ISSN journal
10637834
Volume
40
Issue
3
Year of publication
1998
Pages
453 - 457
Database
ISI
SICI code
1063-7834(1998)40:3<453:MOTCLA>2.0.ZU;2-W
Abstract
The microhardness of La2CuO4 and La1.85Sr0.15CuO4 crystals is measured in the temperature range 81-292 K, and the influence of various facto rs on it is investigated. The thermal activation parameters of the pla stic deformation process in the vicinity of the indenter impression ar e estimated. The change of the phase state of the compound La1.85Sr0.1 5CuO4 at the temperature T-0=180 K and the appearance of domain (twin) boundaries formed in the ferroelastic tetra-ortho transition are not seen in the temperature dependence of the microhardness, The results o f the study are compared with previously published results for YBa2CuO 7-x crystals. (C) 1998 American Institute of Physics. [S1063-7834(98)0 1903-0].