Effect of changing P/Ge and Mn/Fe ratios on the magnetocaloric effect and structural transition in the (Mn,Fe)2 (P,Ge) intermetallic compounds

• Autorzy: Wlodarczyk P. , Hawelek L. , Zackiewicz P. , Kaminska M. , Chrobak A. , Kolano-Burian A.

Identyfikatory

DOI

10.1515/msp-2016-0068

• Języki publikacji: EN

Abstrakty

EN

The magnetocaloric effect in the Mn_xFe_2xP<sub.1y</sub>Ge_y intermetallic compounds with the amount of Mn in the range of x = 1.05 to 1.17 and amount of Ge in the range of y = 0.19 to 0.22 has been studied. It was found that a higher Ge/P ratio causes an increase in Curie temperature, magnetocaloric effect at low field (up to 1 T), activation energy of structural transition and a decrease in thermal hysteresis, as well as transition enthalpy. Contrary to this observation, higher Mn/Fe ratio causes a decrease in Curie temperature, slight decrease of magnetocaloric effect at low magnetic field, and an increase in thermal hysteresis. Simultaneous increase of both ratios may be very advantageous, as the thermal hysteresis can be lowered and magnetocaloric effect can be enhanced without changing the Curie temperature. Some hints about optimization of the composition for applications at low magnetic fields (0.5 T to 2 T) have been presented.

Słowa kluczowe

EN

magnetocaloric effect; Fe2P type compounds; phase transition

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2016
• Tom: Vol. 34, No. 3
• Strony: 494--502
• Opis fizyczny: Bibliogr. 13 poz., rys., tab.

Twórcy

autor

Wlodarczyk P.

• Institute of Non-Ferrous Metals, ul. Sowinskiego 5, 44-100 Gliwice, Poland

autor

Hawelek L.

• Institute of Non-Ferrous Metals, ul. Sowinskiego 5, 44-100 Gliwice, Poland

autor

Zackiewicz P.

• Institute of Non-Ferrous Metals, ul. Sowinskiego 5, 44-100 Gliwice, Poland

autor

Kaminska M.

• Institute of Non-Ferrous Metals, ul. Sowinskiego 5, 44-100 Gliwice, Poland

autor

Chrobak A.

• University of Silesia, Institute of Physics, ul. Uniwersytecka 4, 40-007 Katowice, Poland

autor

Kolano-Burian A.

• Institute of Non-Ferrous Metals, ul. Sowinskiego 5, 44-100 Gliwice, Poland

Bibliografia

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Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.