New Materials of RMn_{2}Ge_{2} Type for Thermomagnetic Devices

• Authors: P. Markin , S. Zemlyanskii , N. Baranov
• Languages of publication: EN

Abstracts

EN

The new type of the working media for thermomagnetic devices is proposed: the intermetallic compounds which have large magnetocrystalline anisotropy and exhibit the spontaneous phase transition from the antiferromagnetic (AF) to ferromagnetic (F) state when the temperature increases above the critical value T_{t}. Moreover, the anisotropy in AF state in the fields below the critical AF-F transition field must be much lower than in the F state. In the present paper the Gd_{0.6}Sm_{0.4}Mn_{2}Ge_{2} compound belonging to the tetragonal RMn_{2}Ge_{2} system is investigated. This compound has the critical temperature T_{t} = 280 K. The thermomagnetic cycle can be realized on the AF-F-AF transition near T_{t2}. The interval of the working temperatures can be shifted with the change of the Gd and Sm concentration.

Keywords

EN

71.20.Lp; 72.15.Jf; 75.30.Gw

Discipline

• 72.15.Jf: Thermoelectric and thermomagnetic effects
• 75.30.Gw: Magnetic anisotropy
• 71.20.Lp: Intermetallic compounds

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1997
• Volume: 92
• Issue: 2
• Pages: 327-330

Dates

published

1997-08

Contributors

author

P. Markin

• Ural State University, Ekaterinburg, Russia

author

S. Zemlyanskii

• Ural State University, Ekaterinburg, Russia

author

N. Baranov

• Ural State University, Ekaterinburg, Russia

Identifiers

DOI

10.12693/APhysPolA.92.327