Magnetic-Field Induced Slow Relaxation in the Ising-Like Quasi-One-Dimensional Ferromagnet KEr(MoO₄)₂

• Authors: V. Tkáč , A. Orendáčová , L'. Dlháň , M. Orendáč , R. Boča , A. Feher
• Languages of publication: EN

Abstracts

EN

We present the study of spin dynamics of KEr(MoO₄)₂ in the magnetic field applied along the hard axis c. The temperature dependence of AC susceptibility in zero magnetic field studied at frequencies f=10, 100, and 1000 Hz indicated the absence of relaxation in the temperature range from 2 to 20 K. Application of magnetic field induced a slow magnetic relaxation, which was investigated in detail in the field 0.5 T. The highest intensity of the relaxation process, reflected by the values of imaginary susceptibility was observed at 2 K. With increasing temperature, the relaxation process is weaker and vanishes completely above 3.5 K. Corresponding Cole-Cole diagrams were constructed and analyzed within a single relaxation process which can be associated with a direct relaxation process with a bottleneck effect, τ ≈1/T^b, and b=1.4. The slow relaxation at 2 K intensifies with increasing magnetic field at least up to 1 T.

Keywords

EN

76.60.Es; 76.30.Kg; 75.30.Gw; 75.40.Gb

Discipline

• 75.30.Gw: Magnetic anisotropy
• 75.40.Gb: Dynamic properties (dynamic susceptibility, spin waves, spin diffusion, dynamic scaling, etc.)
• 76.60.Es: Relaxation effects
• 76.30.Kg: Rare-earth ions and impurities

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2017
• Volume: 131
• Issue: 4
• Pages: 893-895

Dates

published

2017-04

Contributors

author

V. Tkáč

• Centre of Low Temperature Physics of SAS and P.J. Šafárik University, Park Angelinum 9, 04001 Košice, Slovak Republic

author

A. Orendáčová

• Centre of Low Temperature Physics of SAS and P.J. Šafárik University, Park Angelinum 9, 04001 Košice, Slovak Republic

author

L'. Dlháň

• Institute of Inorganic Chemistry, FCHPT, Slovak University of Technology, 812 37 Bratislava, Slovakia

author

M. Orendáč

• Centre of Low Temperature Physics of SAS and P.J. Šafárik University, Park Angelinum 9, 04001 Košice, Slovak Republic

author

R. Boča

• Department of Chemistry, FPV, University of SS Cyril and Methodius, 917 01 Trnava, Slovakia

author

A. Feher

• Centre of Low Temperature Physics of SAS and P.J. Šafárik University, Park Angelinum 9, 04001 Košice, Slovak Republic

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Identifiers

DOI

10.12693/APhysPolA.131.893