A STUDY OF THE MAGNON CONTRIBUTION TO HEA T-CAPACITY OF THE MULTISUBLATTICE ANTIFERROMAGNETS LA2CUO4 AND CUCL2-CENTER-DOT-2H2O

Authors
PASHKEVICH YG SHAKHOV VV BLINKIN VA SOBOLEV VL ZAKHAROV AA SUETIN AV KHLOPKIN MN
Citation
Yg. Pashkevich et al., A STUDY OF THE MAGNON CONTRIBUTION TO HEA T-CAPACITY OF THE MULTISUBLATTICE ANTIFERROMAGNETS LA2CUO4 AND CUCL2-CENTER-DOT-2H2O, Fizika nizkih temperatur, 20(5), 1994, pp. 423-432
Citations number
27
Categorie Soggetti
Physics, Applied
Journal title
Fizika nizkih temperatur → ACNP
ISSN journal
01326414
Volume
20
Issue
5
Year of publication
1994
Pages
423 - 432
Database
ISI
SICI code
0132-6414(1994)20:5<423:ASOTMC>2.0.ZU;2-L
Abstract
The paper reports on a theoretical calculation of the magnon and phono n contributions to heat capacity of the multisublattice antiferromagne ts La2CuO4 and CuCl2.2H2O, the former being the basic compound of a hi gh-T(c) superconductor. It has been shown that it is only in the forme r that the contribution of exchange magnons to heat capacity at low te mperatures is comparable with that of acoustic magnons which results f rom the quasi-two-dimensionality of its magnetic subsystem. Heat capac ity of La2CuO4 was measured in the range 4.5-25 K, and specific featur es associated with the magnon contribution were revealed.