57Fe Mössbauer effect studies of ErFe11Ti and ErFe11TiH compounds

• Autorzy: Gaczyński P. , Tereshina I. , Rusakov V. , Nikitin S. , Drulis H.
• Konferencja: Proceedings of the All-Polish Seminar on Moessbauer Spectroscopy OSSM'2002, June 9-12, 2002, Goniądz, Poland
• Języki publikacji: EN

Abstrakty

EN

Ferromagnetic compounds ErFe11TiHx (x = 0, 1) have been investigated by 57Fe Mössbauer spectroscopy in the temperature range 20–300 K. Mössbauer spectra were analyzed in terms of a model which takes into account the local environment of Fe atoms on three crystallographic sites (8f, 8j and 8i) and an influence of the random distribution of titanium on the 8i site. The 14 sextets with different intensities have been considered. The temperature dependencies of hyperfine interaction parameters and subspectra contributions were derived from experimental spectra. The hyperfine fields and the isomer shift increasing upon hydrogenation are discussed in terms of the hydrogen-induced Wigner-Seitz unit cell expansion and the s-electrons transfer from Fe atoms to the adjacent hydrogen atoms.

Słowa kluczowe

EN

rare earth; iron compounds; metal hydrides; Mössbauer spectroscopy

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2003
• Tom: Vol. 48,suppl.1
• Strony: 25--29
• Opis fizyczny: Bibliogr. 14 poz., rys.

Twórcy

autor

Gaczyński P.

• Trzebiatowski Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 1410, 2 Okólna Str., 50-950 Wrocław, Poland, Tel.: [phone], Fax: [phone]

autor

Tereshina I.

• Physics Department of Moscow State University, 119 899, Moscow, Russia

autor

Rusakov V.

• Physics Department of Moscow State University, 119 899, Moscow, Russia

autor

Nikitin S.

• Physics Department of Moscow State University, 119 899, Moscow, Russia

autor

Drulis H.

• Trzebiatowski Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 1410, 2 Okólna Str., 50-950 Wrocław, Poland, Tel.: [phone], Fax: [phone]

Bibliografia

• 1. Bara JJ, Bogacz BF, Pędziwiatr AT, Wielgosz R (2000)Hyperfine interaction and crystal site occupancies in RTiFe11−xCox (R = Y, Dy and Er) as seen by Mössbauer spectroscopy. J Alloys Compd 307:45−50
• 2. Fujii H, Sun H (1995) Interstitially modified intermetallics of rare earth and 3D elements. In: Buschow KHJ (eds) Handbook of magnetic materials, 9th ed. Elsevier, Amsterdam,pp 304−334
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• 4. Hu B, Li H, Gavigan JP, Coey JM (1989) Intrinsic magnetic properties of the iron-rich ThMn12-structure alloys RFe11Ti R = Y, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm and Lu. J PhysCondens Mater 1:755−770
• 5. Isnard O, Guillot M (1998) Investigation of the magnetic properties of ErFe11Ti and ErFe11TiH in high magnetic field. J Appl Phys 83:6730−6732
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• 7. Nikitin SA, Tereshina IS, Skurskij YuW et al. (2001) Vlijanie gidrirovanija na spin-pereorientacjonnoe fazovye perekhody i konstanty magnitnoj anizotropii monokrystalov RFe11Ti (R = Lu, Ho, Er). Fizika Tverdogo Tela 43:279−288
• 8. Nikitin SA, Tereshina IS, Verbetsky VC, Salamova AA (2001) Transformations of magnetic phase diagram as a result of insertion of hydrogen and nitrogen atoms in crystalline lattice of RFe11Ti compounds. J Alloys Compd 316:46−50
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