Crystallographic and magnetic properties of UFe5.8Al6.2 single crystals

A P Goncalves, Pedro Estrela, J C Waerenborgh, J A Paixao, M Bonnet, J C Spirlet, M Godinho, M Almeida

Research output: Contribution to journalArticle

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Abstract

Single crystals of UFe5.8Al6.2 were characterised by X-ray and neutron diffraction, Fe-57 Mossbauer spectroscopy and magnetisation. The structure refinement by X-ray and neutron diffraction shows a ThMn12-type structure, the Fe atoms fully occupying the 8f and partially occupying the 8j positions. Mossbauer spectra confirm these occupations and further indicate a magnetic ordering below 293 K. Magnetisation measurements show a ferromagnetic behaviour below 300 K, with a and b as easy directions and a spontaneous magnetisation of 10.4 mu(B)/f.u. at 5 K, due to the Fe occupation of 8j position. These single crystal results significantly differ from those previously obtained in UFe6Al6 polycrystalline samples obtained by melting and annealing.
Original languageEnglish
Pages (from-to)283-292
Number of pages10
JournalJournal of Magnetism and Magnetic Materials
Volume189
Issue number3
Publication statusPublished - 1998

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Magnetization
Magnetic properties
Single crystals
magnetic properties
occupation
magnetization
neutron diffraction
single crystals
Neutron diffraction
diffraction
X ray diffraction
Mossbauer spectroscopy
x rays
melting
Melting
annealing
Annealing
Atoms
spectroscopy
atoms

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Goncalves, A. P., Estrela, P., Waerenborgh, J. C., Paixao, J. A., Bonnet, M., Spirlet, J. C., ... Almeida, M. (1998). Crystallographic and magnetic properties of UFe5.8Al6.2 single crystals. Journal of Magnetism and Magnetic Materials, 189(3), 283-292.

Crystallographic and magnetic properties of UFe5.8Al6.2 single crystals. / Goncalves, A P; Estrela, Pedro; Waerenborgh, J C; Paixao, J A; Bonnet, M; Spirlet, J C; Godinho, M; Almeida, M.

In: Journal of Magnetism and Magnetic Materials, Vol. 189, No. 3, 1998, p. 283-292.

Research output: Contribution to journalArticle

Goncalves, AP, Estrela, P, Waerenborgh, JC, Paixao, JA, Bonnet, M, Spirlet, JC, Godinho, M & Almeida, M 1998, 'Crystallographic and magnetic properties of UFe5.8Al6.2 single crystals', Journal of Magnetism and Magnetic Materials, vol. 189, no. 3, pp. 283-292.
Goncalves AP, Estrela P, Waerenborgh JC, Paixao JA, Bonnet M, Spirlet JC et al. Crystallographic and magnetic properties of UFe5.8Al6.2 single crystals. Journal of Magnetism and Magnetic Materials. 1998;189(3):283-292.
Goncalves, A P ; Estrela, Pedro ; Waerenborgh, J C ; Paixao, J A ; Bonnet, M ; Spirlet, J C ; Godinho, M ; Almeida, M. / Crystallographic and magnetic properties of UFe5.8Al6.2 single crystals. In: Journal of Magnetism and Magnetic Materials. 1998 ; Vol. 189, No. 3. pp. 283-292.
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AU - Estrela, Pedro

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AU - Paixao, J A

AU - Bonnet, M

AU - Spirlet, J C

AU - Godinho, M

AU - Almeida, M

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N2 - Single crystals of UFe5.8Al6.2 were characterised by X-ray and neutron diffraction, Fe-57 Mossbauer spectroscopy and magnetisation. The structure refinement by X-ray and neutron diffraction shows a ThMn12-type structure, the Fe atoms fully occupying the 8f and partially occupying the 8j positions. Mossbauer spectra confirm these occupations and further indicate a magnetic ordering below 293 K. Magnetisation measurements show a ferromagnetic behaviour below 300 K, with a and b as easy directions and a spontaneous magnetisation of 10.4 mu(B)/f.u. at 5 K, due to the Fe occupation of 8j position. These single crystal results significantly differ from those previously obtained in UFe6Al6 polycrystalline samples obtained by melting and annealing.

AB - Single crystals of UFe5.8Al6.2 were characterised by X-ray and neutron diffraction, Fe-57 Mossbauer spectroscopy and magnetisation. The structure refinement by X-ray and neutron diffraction shows a ThMn12-type structure, the Fe atoms fully occupying the 8f and partially occupying the 8j positions. Mossbauer spectra confirm these occupations and further indicate a magnetic ordering below 293 K. Magnetisation measurements show a ferromagnetic behaviour below 300 K, with a and b as easy directions and a spontaneous magnetisation of 10.4 mu(B)/f.u. at 5 K, due to the Fe occupation of 8j position. These single crystal results significantly differ from those previously obtained in UFe6Al6 polycrystalline samples obtained by melting and annealing.

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