Magnetic Excitation in Singlet-Ground-State System CsFeCl3

Autor:	Naoshi Suzuki, Junichi Makino
Rok vydání:	1995
Předmět:	Brillouin zone Physics Anisotropy energy Condensed matter physics Magnon Magnet Exchange interaction General Physics and Astronomy Antiferromagnetism Condensed Matter::Strongly Correlated Electrons Excitation Magnetic field
Zdroj:	Journal of the Physical Society of Japan. 64:2166-2174
ISSN:	1347-4073 0031-9015
Popis:	Effects of magnetic fields on the magnetic excitation of hexagonal singlet-ground-state magnet CsFeCl 3 are studied on the basis of the dynamical correlated-effective-field theory. First, the single-ion anisotropy energy D and the intrachain (interchain) exchange integral J 1 ( J 2 ) are determined so as to reproduce the observed magnon energies of particular k -points at T =5 K: D =14 cm -1 , J 1 =2.59 cm -1 and J 2 =-0.14 cm -1 . The value of D is almost the same as that of RbFeCl 3 , but the magnitudes of J 1 and J 2 are smaller than those of RbFeCl 3 . The calculated field dependence of the magnon energies at the Brillouin zone center agrees well with the experimental data obtained by ESR measurements. The magnetic excitation of CsFeBr 3 with antiferromagnetic intrachain exchange interaction is also calculated and the results are compared with those of CsFeCl 3 .
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ad1dda6797c60a7d4b9ce0c36a22c9a2 https://doi.org/10.1143/jpsj.64.2166 Zobrazit plný text záznamu