Magnetization Processes in Dilute Metamagnets with Ferro- and Antiferromagnetic Exchange Interactions

• Authors: R. Pikuła , J. Kirkiewicz
• Languages of publication: EN

Abstracts

EN

Using the Green function method there has been presented the mathematical description of dilute two sub-lattice metamagnets with ferro- and antiferromagnetic exchange interactions. The Green function averaging procedure is based on the Cumulant Expansion Technique and includes any localized Green function irrespectively of the decoupling algorithm making the chain system of equations self-consistent. The derived form of the averaged Green function is the base for the analysis of magnetization processes and phase transitions occurring in the system under the influence of external magnetic field. It has been found in particular that the tricritical point and the second-order phase transition vanish when concentrations of magnetic atoms coupled with different sub-lattice points become different.

Keywords

EN

05.70.Jk; 64.60.Kw; 75.10.-b; 75.30.Kz

Discipline

• 75.10.-b: General theory and models of magnetic ordering(see also 05.50.+q Lattice theory and statistics)
• 64.60.Kw: Multicritical points
• 75.30.Kz: Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.)(for ferroelectric phase transitions, see 77.80.B-; for superconductivity phase diagrams, see 74.25.Dw)
• 05.70.Jk: Critical point phenomena(for quantum critical phenomena in superconductivity, see 74.40.Kb)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2006
• Volume: 110
• Issue: 1
• Pages: 25-39

Dates

published

2006-07

received

2006-02-27

(unknown)

2006-06-23

Contributors

author

R. Pikuła

• Maritime University, Department of Physics, Wały Chrobrego 1/2, 70-500 Szczecin, Poland

author

J. Kirkiewicz

• Maritime University, Department of Physics, Wały Chrobrego 1/2, 70-500 Szczecin, Poland

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Identifiers

DOI

10.12693/APhysPolA.110.25