Structural and magnetic properties of Sc(Fe1-xCux)2 compounds studied by means of Mössbauer effect and neutron diffraction

• Autorzy: Wiertel M. , Surowiec Z. , Budzyński M. , Sarzyński J.
• 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

The subject of the investigations were quasibinary Sc(Fe1-xCux)2 Laves phases in which structural and magnetic properties depend on replacement of Fe atoms by Cu atoms. Powder X-ray diffraction and neutron diffraction measurements carried out at room temperature revealed that samples were a mixture of two phases: the quasibinary Sc(Fe1-xCux)2 compounds with cubic C15 structure and ScCu2 with tetragonal structure. 57Fe Mossbauer spectroscopy revealed that the Sc(Fe1-xCux)2 compounds are ferrimagnetic up to an actual concentration xact less than 0.30. A decreasing of mean values of hyperfine magnetic fields was observed. On the basis of analysis of the neutron diffraction spectra the mean values of Fe magnetic moments were determined, considering the component connected with the quasibinary Sc(Fe1-xCux)2 phases. These moments change from 1.45(29) �ĘB in the Sc(Fe0.92Cu0.08)2 to 1.18(32)mi B in Sc(Fe0.72Cu0.28)2 phase at 8 K. From the results of independent hyperfine magnetic field on 57Fe probes and magnetic Fe moments measurements, the hyperfine coupling constant in quasibinary ferrimagnetic Sc(Fe1.xCux)2 phases is estimated as equal to 13 T/mi B at room temperature.

Słowa kluczowe

EN

hyperfine fields; Mössbauer effect; neutron diffraction; quasibinary Laves phase

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2013
• Tom: Vol. 58, No. 1
• Strony: 173--178
• Opis fizyczny: Bibliogr. 15 poz., rys.

Twórcy

autor

Wiertel M.

autor

Surowiec Z.

autor

Budzyński M.

autor

Sarzyński J.

• Maria Curie-Skłodowska University, Institute of Physics, 1 M. Curie-Skłodowskiej Sq., 20-031 Lublin, Poland, Tel.: [phone], Fax: [phone],

Bibliografia

• 1. Amara SE (1999) Stable and metastable equilibria in the binary Fe-Cu and ternary Fe-Cu-C systems. Z Metallkd 90:116–123
• 2. Asano S, Ishida S (1988) Magnetism and crystal structure of Laves phase compounds. J Phys F: Met Phys 18:501–515
• 3. Dwight AE, Downey JW, Conner RA (1967) Some C11btype compounds of Sc, Y, and the lanthanides with Cu, Ag, and Au. Acta Crystallogr 22:745–747
• 4. Hilscher G (1981) Onset of magnetism in concentrated ternary alloys II. Laves phase compounds A(Fe1–xBx)2 (A= Y, Zr, U; B = Mn, Co and Al). J. Magn Magn Mater 27:1–31
• 5. Kotur BY, Derkach VO, Dutsyak IS, Pavlyshyn AZ (1996) Structure and electrical properties of ScCu4 as bulk alloy and thin film. J Alloys Compd 238:81–85
• 6. Moriya T (1982) Spin fluctuations in ferromagnetic metals − temperature variation of local moment and short range order. J Phys Soc Jpn 51:420–434
• 7. Muraoka Y, Shiga M, Nakamura Y (1979) Magnetic properties and Mössbauer effects of Zr(Fe1−xCox)2. J Phys F: Metal Phys 9:1889–1904
• 8. Pokatilov VS, Golikova V, Tsvyashchenko A, Fomichova L (1990) Hyperfine fields and magnetic moments in intermetallic ScFe2 with cubic and hexagonal structures. Hyperfine Interact 59:529–532
• 9. Reissner R, Steiner W (1986) Electrostatic hyperfine interactions in Y(Fe1–xAlx)2. Hyperfine Interact 28:1017−1020
• 10. Subramanian PR, Laughlin DE, Chakrabarti DJ (1988) The Cu-Sc (copper-scandium) system. Bull Alloy Phase Diag 9;3a:378–382
• 11. Wdowik UD, Ruebenbauer K (2007) Calibration of the isomer shift for the 14.4-keV transition in 57Fe using the full-potential linearized augmented plane-wave method. Phys Rev B 76:155118-1-6
• 12. Wertheim GK, Jaccarino V, Wernick JH (1964) Anisotropic hfs interactions in ferromagnets from Mössbauer effect studies. Phys Rev 135;1A:A151–A154
• 13. Wiertel M, Surowiec Z, Beskrovnyi AI Sarzyński J, Budzyński M (2005) Determination of magnetic moments and hyperfine fields in ScFe2 Laves phase compound. Annual report, FLNP, JINR, Dubna. Electronic version available at http://flnp.jinr.ru/img/304/188_2005_Annual_Report.pdf
• 14. Wiertel M, Surowiec Z, Sarzyński J, Budzyński M, Beskrovnyi AI (2007) Structural and magnetic investigations of Sc(Fe1–xNix)2 compounds by means of Mössbauer effect and neutron diffraction. Nukleonika 52;Suppl 1:S67–S71
• 15. Yamada H (1988) Electronic structure and magnetic properties of the cubic Laves phase transition metal compounds. Physica B 149:390–402