Mössbauer study of the Fe1-xNix Invar alloys by monochromatic circularly polarized source

• Autorzy: Satuła D. , Szymański K. , Dobrzyński L. , Rećko K. , Waliszewski J.
• Konferencja: Proceedings of the All-Polish Seminar on Moessbauer Spectroscopy OSSM'2002, June 9-12, 2002, Goniądz, Poland
• Języki publikacji: EN

Abstrakty

EN

X-ray diffraction measurements and Mössbauer spectroscopy with and without external magnetic field parallel to beam direction have been performed for Fe1-xNix (x = 0.25, 0.30, 0.35) alloys. The compositions of the studied alloys were chosen in order to cover the concentration range where the fcc - bcc structural transformation appears, as well as where single phase fcc Fe-Ni alloys exhibit the Invar phenomena. Spatial distribution of the iron magnetic moments is discussed. The hyperfine magnetic field (h.m.f.) distribution is analyzed within a scope of two models discussed in the literature. In the first model it is assumed that any hyperfine magnetic filed vector have the same spatial distribution (the same values of (). In the second, the low field component of the hyperfine magnetic field is ordered antiferomagnetically (or disordered) while the high field component is aligned by an external magnetic field. In order to determine the mean values of cosine of the angle between teta-rays direction and hyperfine field vector of iron, (), a monochromatic circularly polarized Mössbauer source (MCPMS) was used. The analysis of the MCPMS results show that the shapes of the measured spectra can be explained by single values of .

Słowa kluczowe

EN

Invar alloys; Mössbauer polarimetry; transition metal alloys

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2003
• Tom: Vol. 48,suppl.1
• Strony: 71--74
• Opis fizyczny: Bibliogr. 9 poz., rys.

Twórcy

autor

Satuła D.

• Institute of Experimental Physics, University of Białystok, 41 Lipowa Str., 15-424 Białystok, Poland, Tel.: [phone], Fax: [phone]

autor

Szymański K.

• Institute of Experimental Physics, University of Białystok, 41 Lipowa Str., 15-424 Białystok, Poland, Tel.: [phone], Fax: [phone]

autor

Dobrzyński L.

• Institute of Experimental Physics, University of Białystok, 41 Lipowa Str., 15-424 Białystok, Poland and The Andrzej Sołtan Institute for Nuclear Studies, 05-400 Otwock-Świerk, Poland

autor

Rećko K.

• Institute of Experimental Physics, University of Białystok, 41 Lipowa Str., 15-424 Białystok, Poland, Tel.: [phone], Fax: [phone]

autor

Waliszewski J.

• Institute of Experimental Physics, University of Białystok, 41 Lipowa Str., 15-424 Białystok, Poland, Tel.: [phone], Fax: [phone]

Bibliografia

• 1. Dubrovinsky L, Dubrovinskaya N, Abrikosov IA (2001) Pressure-induced Invar effect in Fe-Ni alloys. Phys Rev Lett 86:4851−4854
• 2. Hesse J (1989) From FeNi-Invar to FeNiMn reentrant spin--glasses. Hyperfine Interact 47:357−378
• 3. Johnson CE, Ridout MS, Cranshaw TE (1963) The Mössbauer effect on iron alloys. Proc Phys Soc 81:1079−1090
• 4. Müller JB, Hesse J (1983) A model for magnetic abnormalies of FeNi Invar alloys. I. Macroscopic magnetic properties. Z Phys B 54:35−42
• 5. Müller JB, Hesse J (1983) A model for magnetic abnormalies of FeNi Invar alloys. II. Microscopic properties. Z Phys B 54:43−48
• 6. Szymański K, Dobrzyński L, Prus B, Cooper MJ (1996) A single line circularly polarised source of Mössbauer spectroscopy. Nucl Instrum Meth Phys Res B 119:438−441
• 7. Ullrich H, Hesse J (1984) Hyperfine field vectors and hyperfine field distributions in FeNi Invar alloys. J Magn Magn Mater 45:315−327
• 8. Van Schilfgaarde M, Abrikosov IA, Johansson B (1999) Origin of the Ivar effect in iron-nickiel alloys. Nature 400:46−49
• 9. Weiss RJ (1963) The origin of the “Invar” effect. Proc Phys Soc 82:281−288