CuBr_2(C_{10}H_8N_2) - S = 1/2 Two-Dimensional Rectangular Heisenberg Antiferromagnet

• Authors: E. Čižmár , M. Kajňaková , A. Orendáčová , M. Orendáč , A. Feher , A. Anders , J. Park , M. Meisel
• Languages of publication: EN

Abstracts

EN

Magnetic susceptibility and X-band electron spin resonance study of a two-dimensional Heisenberg antiferromagnetic system CuBr_2(bipy), where bipy = C_{10}H_8N_2 is 4,4'-bipyridyl, has been performed in the temperature range from 300 K down to 2 K. A rhombic anisotropy of the g-factor was obtained from X-band EPR measurements with g_{x} = 2.037, g_{y} = 2.100 and g_{z} = 2.219. The temperature dependence of the magnetic susceptibility with a round maximum observed at 28 K suggests antiferromagnetic type of short-range order. No signature of the magnetic long-range order in studied compound was observed. The comparison of the magnetic susceptibility data with a two-dimensional rectangular Heisenberg model yields the values of intralayer exchange couplings J/k_{B} = - 47 K and J'/k_{B} = - 9.4 K.

Keywords

EN

75.30.Et; 75.50.Ee; 76.30.-v

Discipline

• 75.30.Et: Exchange and superexchange interactions(see also 71.70.Gm Exchange interactions)
• 75.50.Ee: Antiferromagnetics
• 76.30.-v: Electron paramagnetic resonance and relaxation(see also 33.35.+r Electron resonance and relaxation in atomic and molecular physics; 87.80.Lg Magnetic and paramagnetic resonance in biological physics)

• Journal: Acta Physica Polonica A
• Year: 2010
• Volume: 118
• Issue: 5
• Pages: 973-974

Dates

published

2010-11

Contributors

author

E. Čižmár

• Centre of Low Temperature Physics, P.J. Šafárik University, Park Angelinum 9, SK-04154 Košice, Slovak Republic

author

M. Kajňaková

• Centre of Low Temperature Physics, P.J. Šafárik University, Park Angelinum 9, SK-04154 Košice, Slovak Republic

author

A. Orendáčová

• Centre of Low Temperature Physics, P.J. Šafárik University, Park Angelinum 9, SK-04154 Košice, Slovak Republic

author

M. Orendáč

• Centre of Low Temperature Physics, P.J. Šafárik University, Park Angelinum 9, SK-04154 Košice, Slovak Republic

author

A. Feher

• Centre of Low Temperature Physics, P.J. Šafárik University, Park Angelinum 9, SK-04154 Košice, Slovak Republic

author

A. Anders

• Institute for Low Temperature Physics and Engineering, Lenin Av. 47, 310164 Kharkov, Ukraine

author

J. Park

• National High Magnetic Field Laboratory, Tallahassee, FL 32310-3706, USA
• Department of Physics and Center for Condensed Matter Sciences, University of Florida, Gainesville FL 32611-8440, USA

author

M. Meisel

• National High Magnetic Field Laboratory, Tallahassee, FL 32310-3706, USA

References

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Identifiers

DOI

10.12693/APhysPolA.118.973