Phase constitution of an LaFe11.0Co0.8(Si0.4Al0.6)1.2 alloy investigated by Mössbauer spectroscopy

• Autorzy: Gębara P. , Pawlik P. , Wysłocki J. J. , Szwaja M.
• Konferencja: Proceedings of the 9th All - Polish Seminar on Mössbauer Spectroscopy OSSM'2012, 10-13 June 2012, Lublin - Kazimierz Dolny, Poland
• Języki publikacji: EN

Abstrakty

EN

In the present work the phase constitution and magnetic ordering of the magnetocaloric LaFe11.0Co0.8(Si0.4Al0.6)1.2 alloy in the as-cast state and after annealing at 1323 K for 1 h (in case of ribbons) and 49 days (in case of bulk) were studied. For bulk and ribbon samples in as-cast state three crystalline phases were identified: dominant ferromagnetic alfa-Fe, minor ferromagnetic La(Fe,Co)Si and traces of paramagnetic La(Fe,Si)13 phase. Appropriate heat treatment resulted in the evolution of phase constitution of the alloy, where two crystalline phases were developed: the dominant paramagnetic La(Fe,Si)13 phase and a minor fraction of the ferromagnetic alfa-Fe for both bulk and ribbon samples.

Słowa kluczowe

EN

magnetocaloric materials; Mössbauer spectroscopy

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2013
• Tom: Vol. 58, No. 1
• Strony: 113--116
• Opis fizyczny: Bibliogr. 10 poz., rys.

Twórcy

autor

Gębara P.

autor

Pawlik P.

autor

Wysłocki J. J.

autor

Szwaja M.

• Częstochowa University of Technology, Faculty of Processing Materials, Technology and Applied Physics, Institute of Physics, 19 Armii Krajowej Str., 42-200 Częstochowa, Poland, Tel./Fax: [phone],

Bibliografia

• 1. Gębara P, Pawlik P, Kulej E, Wysłocki JJ, Pawlik K, Przybył A (2010) The evolution of microstructure in annealed LaFeSi-type alloys. Opt Appl XXXIX 4
• 2. Gębara P, Pawlik P, Skorvanek I, Marcin J, Wysłocki JJ (2010) Structural and magnetocaloric study of the LaFe11.0Co0.8(Si0.4Al0.6)1.2 alloy. Acta Phys Pol A 118:5
• 3. Gębara P, Pawlik P, Skorvanek I et al. (2012) The influence of alloy admixture on structure and properties of La(Fe,Co,Si)13-type phase. Acta Phys Pol A 121:5–6
• 4. Hu Feng-xia, Shen Bao-gen, Sun Ji-rong, Cheng Zhao-hua, Rao Guang-hui, Zhang Xi-xiang (2001) Influence of negative lattice expansion and metamagnetic transition on magnetic entropy change in the compound LaFe11.4Si1.6. Appl Phys Lett 78:3675 (3 pp)
• 5. Hu Feng-xia, Shen Bao-gen, Sun Ji-rong, Wang Guan-jun, Cheng Zhao-hua (2002) Very large magnetic entropy change near room temperature in LaFe11.2Co0.7Si1.1. Appl Phys Lett 80:826 (3 pp)
• 6. Kraus W, Nolze G, POWDERCELL 2.4, D-BAM, 12205 Berlin
• 7. Palstra TTM, Mydosh JA, Nieuwenhuys GJ, van der Kraan AM, Buschow KHJ (1983) Study of the critical behavior of the magnetization and electrical resistivity in cubic La(Fe,Si)13 compounds. J Magn Magn Mater 36:290–296
• 8. Palstra TTM, Werij HGC, Nieuwenhuys GJ, Mydosh JA, de Boer FR, Buschow KHJ (1984) Metamagnetic transitions in cubic La(FexAl12–x)13 intermetallic compounds. J Phys F: Met Phys 14:1961–1966
• 9. Pecharsky VK, Gschneidner KA (1997) Tunable magnetic regenerator alloys with a giant magnetocaloric effect for magnetic refrigeration from 20 to 290K. Appl Phys Lett 70:3299 (3 pp)
• 10. Xu Bo Liu, Altounian Z (2003) Effect of Co content on magnetic entropy change and structure of La(Fe1–xCox)11.4Si1.6. J Magn Mater 264:209–213