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періодичних видань НАН України
Localized-magnon states in strongly frustrated quantum spin lattices
Репозиторій DSpace/Manakin
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Localized-magnon states in strongly frustrated quantum spin lattices
Тема:
К семидесятилетию антиферромагнетизма
Інший ID:
PACS: 75.10.Jm, 75.45.+j, 75.60.Ej, 75.50.Ee
Посилання:
Localized-magnon states in strongly frustrated quantum
spin lattices / J. Richter // Физика низких температур. — 2005. — Т. 31, № 8-9. — С. 918-928. — Бібліогр.: 67 назв. — англ.
Підтримка:
The author is indebted to O. Derzhko, A. Honecker,
H.-J. Schmidt, J. Schnack, and J. Schulenburg
for the fruitful collaboration in the field of localized-magnon states in frustrated antiferromagnets.
Most of the results discussed in the paper are based on
common publications with these colleagues. In particular,
I thank J. Schulenburg for many valuable discussions
and hints. Furthermore I thank H. Frahm for directing
my attention to the flat-band ferromagnetism.
I also acknowledge the support from the Deutsche
Forschungsgemeinschaft (project No. Ri615/12-1).
Дата:
2005
Переглядів:
653
Завантажень:
421
Анотація:
Recent developments concerning localized-magnon eigenstates in strongly frustrated spin lattices
and their effect on the low-temperature physics of these systems in high magnetic fields are
reviewed. After illustrating the construction and the properties of localized-magnon states we describe
the plateau and the jump in the magnetization process caused by these states. Considering
appropriate lattice deformations fitting to the localized magnons we discuss a spin-Peierls instability
in high magnetic fields related to these states. Last but not least we consider the degeneracy of
the localized-magnon eigenstates and the related thermodynamics in high magnetic fields. In particular,
we discuss the low-temperature maximum in the isothermal entropy versus field curve and
the resulting enhanced magnetocaloric effect, which allows efficient magnetic cooling from quite
large temperatures down to very low ones.
