Specific heat study of magnetic excitations in a one-dimensional S =1 Heisenberg magnet with strong planar anisotropy

dc.contributor.author	Feher, A.
dc.contributor.author	Orendáč, M.
dc.contributor.author	Orendáčová, A.
dc.contributor.author	Čižmár, E.
dc.date.accessioned	2018-02-09T10:55:25Z
dc.date.available	2018-02-09T10:55:25Z
dc.date.issued	2002
dc.identifier.citation	Specific heat study of magnetic excitations in a one-dimensional S =1 Heisenberg magnet with strong planar anisotropy / A.Feher, M.Orendáč, A.Orendáčová, E.Čižmár // Физика низких температур. — 2002. — Т. 28, № 7. — С. 768-773. — Бібліогр.: 12 назв. — англ.	uk_UA
dc.identifier.issn	0132-6414
dc.identifier.other	PACS: 75.40.Cx, 71.20.Be, 75.50.Ee
dc.identifier.uri	http://dspace.nbuv.gov.ua/handle/123456789/130235
dc.description.abstract	The results of experimental studies of the specific heat of the magnetic chain compounds Ni(C₂H₈N₂)₂Ni(CN)₄, Ni(C₁₁H₁₀N₂O)₂Ni(CN)₄, and Ni(C₁₀H₈N₂)₂Ni(CN)₄⋅H₂O are reported. All compounds are identified as S=1 planar Heisenberg magnetic chains with large planar anisotropy and different values of the in-plane anisotropy constant. The low-temperature specific heat data are interpreted assuming the existence of noninteracting excitons and antiexcitons as elementary excitations from the singlet-ground state. The extended strong-coupling model is used for analysis of the data at higher temperatures. The applicability of the models used with respect to the value of the in-plane anisotropy is discussed.	uk_UA
dc.description.sponsorship	We are grateful to Prof. V. V. Eremenko for introducing our Košice group to the wonderful world of low-dimensional magnetism many years ago. One of us (A. F.) acknowledges the hospitality of CRTBT CNRS Grenoble during the preparation of this manuscript. Partial financial support for this work was provided by the grant No. 1/7473/20 from the Slovak Ministry of Education. The material support of U. S. Steel DZ Energetika is gratefully acknowledged.	uk_UA
dc.language.iso	en	uk_UA
dc.publisher	Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України	uk_UA
dc.relation.ispartof	Физика низких температур
dc.subject	Сильно коррелированные системы и высокотемпературная сверхпроводимость	uk_UA
dc.title	Specific heat study of magnetic excitations in a one-dimensional S =1 Heisenberg magnet with strong planar anisotropy	uk_UA
dc.type	Article	uk_UA
dc.status	published earlier	uk_UA