KEr(MoO_{4})_{2} and CsDy(MoO_{4})_{2} - Low-Dimensional Ising Magnets

• Authors: M. Kačmár , A. Orendáčová , E. Čizmár , D. Horváth , M. Orendáč , V. Bondarenko , A. Anders , A. Feher , M. Jaščur
• Languages of publication: EN

Abstracts

EN

In the present work the behaviour of cluster excitations in magnetic field, B, parallel to the easy axis was experimentally studied by the measurements of KEr(MoO_{4})_{2} and CsDy(MoO_{4})_{2} specific heat, C, vs. B dependence studied at a constant temperature. Corresponding Monte Carlo simulations of C revealed that despite of the fact that the Ising exchange-coupling models proved useful for a sufficient description of the specific heat of these dipolar systems in B=0, the analysis of current experimental data requires a partial renormalization of exchange-coupling constants previously obtained from B=0 analysis. The influence of crystal field effects and long-range character of spin correlations is discussed.

Keywords

EN

75.40.Cx; 75.10.Hk; 75.40.Mg

Discipline

• 75.40.Mg: Numerical simulation studies
• 75.10.Hk: Classical spin models
• 75.40.Cx: Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2000
• Volume: 97
• Issue: 5
• Pages: 807-810

Dates

published

2000-05

Contributors

author

M. Kačmár

• Faculty of Science, P.J. Šafárik University, Park Angelinum 9, 04154 Košice, Slovakia

author

A. Orendáčová

• Faculty of Science, P.J. Šafárik University, Park Angelinum 9, 04154 Košice, Slovakia

author

E. Čizmár

• Faculty of Science, P.J. Šafárik University, Park Angelinum 9, 04154 Košice, Slovakia

author

D. Horváth

• Faculty of Science, P.J. Šafárik University, Park Angelinum 9, 04154 Košice, Slovakia

author

M. Orendáč

• Faculty of Science, P.J. Šafárik University, Park Angelinum 9, 04154 Košice, Slovakia

author

V. Bondarenko

• Institute of Low Temp. Physics and Engineering, Lenin Avenue 47, 310164 Kharkov, Ukraine

author

A. Anders

• Institute of Low Temp. Physics and Engineering, Lenin Avenue 47, 310164 Kharkov, Ukraine

author

A. Feher

• Faculty of Science, P.J. Šafárik University, Park Angelinum 9, 04154 Košice, Slovakia

author

M. Jaščur

• Faculty of Science, P.J. Šafárik University, Park Angelinum 9, 04154 Košice, Slovakia

Identifiers

DOI

10.12693/APhysPolA.97.807