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Magnetic properties of Tb2Co17-xGax compounds studied by magnetic measurements and neutron diffraction

Magnetic properties of Tb2Co17-xGax compounds studied by magnetic measurements and neutron diffraction
Magnetic properties of Tb2Co17-xGax compounds studied by magnetic measurements and neutron diffraction
The magnetic properties of Tb2Co17−xGax compounds (x=1,3,5 and 7) were studied by means of neutron diffraction and magnetic measurements. The refinement results of the neutron powder diffraction patterns show that initially the Ga atoms occupy almost exclusively the 18h site in the rhombohedral Th2Zn17 structure and presumably are responsible for the sign reversal of the Co sublattice anisotropy. For x≥3 the Ga atoms increasingly occupy the 6c and 18f sites at the cost of the 18h site that shows a decreasing Ga occupancy in this concentration range. The 9d site is completely avoided by the Ga atoms over the whole concentration range. The sign reversal of the Co sublattice anisotropy is attributed to filling of the 18h site with Ga. From magnetic measurements and neutron diffraction it is derived that the Co moment strongly decreases in size with Ga concentration. There is also a strong decrease of the Curie temperature with Ga concentration.
76-81
Moze, O.
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Giovanelli, L.
617d0e17-6a4a-43cb-8190-a29d65953d24
Kockelmann, W.
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de Groot, C.H.
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Boer, F.R. de
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Buschow, K.H.J.
f5befdac-6b05-4e76-a4ad-90a4d128e4a1
Moze, O.
3de68b38-83ad-4037-abc2-02542262d7ed
Giovanelli, L.
617d0e17-6a4a-43cb-8190-a29d65953d24
Kockelmann, W.
da5cf7f6-dd23-4909-b567-2b54a7a72930
de Groot, C.H.
92cd2e02-fcc4-43da-8816-c86f966be90c
Boer, F.R. de
9df02a01-130f-4851-9aa2-4a051219940c
Buschow, K.H.J.
f5befdac-6b05-4e76-a4ad-90a4d128e4a1

Moze, O., Giovanelli, L., Kockelmann, W., de Groot, C.H., Boer, F.R. de and Buschow, K.H.J. (1998) Magnetic properties of Tb2Co17-xGax compounds studied by magnetic measurements and neutron diffraction. Journal of Alloys and Compounds, 264 (1-2), 76-81. (doi:10.1016/S0925-8388(97)00261-2).

Record type: Article

Abstract

The magnetic properties of Tb2Co17−xGax compounds (x=1,3,5 and 7) were studied by means of neutron diffraction and magnetic measurements. The refinement results of the neutron powder diffraction patterns show that initially the Ga atoms occupy almost exclusively the 18h site in the rhombohedral Th2Zn17 structure and presumably are responsible for the sign reversal of the Co sublattice anisotropy. For x≥3 the Ga atoms increasingly occupy the 6c and 18f sites at the cost of the 18h site that shows a decreasing Ga occupancy in this concentration range. The 9d site is completely avoided by the Ga atoms over the whole concentration range. The sign reversal of the Co sublattice anisotropy is attributed to filling of the 18h site with Ga. From magnetic measurements and neutron diffraction it is derived that the Co moment strongly decreases in size with Ga concentration. There is also a strong decrease of the Curie temperature with Ga concentration.

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Published date: January 1998
Organisations: Nanoelectronics and Nanotechnology

Identifiers

Local EPrints ID: 256318
URI: http://eprints.soton.ac.uk/id/eprint/256318
PURE UUID: c030ac1c-a7d6-468e-b46f-f83ff06889df
ORCID for C.H. de Groot: ORCID iD orcid.org/0000-0002-3850-7101

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Date deposited: 11 Feb 2002
Last modified: 19 Nov 2019 01:50

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