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Neutron diffraction and magnetization measurements of Tb2Co17-xGax intermetallics

Neutron diffraction and magnetization measurements of Tb2Co17-xGax intermetallics
Neutron diffraction and magnetization measurements of Tb2Co17-xGax intermetallics
The crystallographic and magnetic structures of Tb2Co17−xGax (x = 1, 3, 5 and 7) intermetallics have been investigated by time-of-flight neutron powder diffraction at 293 and 4.2 K. All four compounds crystallize in the rhombohedral Th2Zn17 structure (R 3¯ m) with Co atoms fully occupying the 9d site whilst Co and Ga atoms are found to distribute themselves in a non-random manner on the remaining 6c, 18f and 18h sites. These observed site occupations can be correlated with the sign reversal of the Co sublattice magneto-crystalline anisotropy for Ga concentrations x > 3. The magnetic structures of the Tb and Co sublattices have also been refined from the neutron-diffraction data and indicate a complex ferrimagnetic behaviour with Ga composition. The Co moment decreases in size with Ga concentration, as does the Curie temperature.
1044-1045
Giovanelli, L.
617d0e17-6a4a-43cb-8190-a29d65953d24
Moze, O.
3de68b38-83ad-4037-abc2-02542262d7ed
Knockelmann, W.A.
21f86412-6c32-48fd-90d2-a96ffea0fffd
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
Giovanelli, L.
617d0e17-6a4a-43cb-8190-a29d65953d24
Moze, O.
3de68b38-83ad-4037-abc2-02542262d7ed
Knockelmann, W.A.
21f86412-6c32-48fd-90d2-a96ffea0fffd
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

Giovanelli, L., Moze, O., Knockelmann, W.A., de Groot, C.H., Boer, F.R. de and Buschow, K.H.J. (1998) Neutron diffraction and magnetization measurements of Tb2Co17-xGax intermetallics. Journal of Alloys and Compounds, 177-181 (2), 1044-1045. (doi:10.1016/S0304-8853(97)00827-5).

Record type: Article

Abstract

The crystallographic and magnetic structures of Tb2Co17−xGax (x = 1, 3, 5 and 7) intermetallics have been investigated by time-of-flight neutron powder diffraction at 293 and 4.2 K. All four compounds crystallize in the rhombohedral Th2Zn17 structure (R 3¯ m) with Co atoms fully occupying the 9d site whilst Co and Ga atoms are found to distribute themselves in a non-random manner on the remaining 6c, 18f and 18h sites. These observed site occupations can be correlated with the sign reversal of the Co sublattice magneto-crystalline anisotropy for Ga concentrations x > 3. The magnetic structures of the Tb and Co sublattices have also been refined from the neutron-diffraction data and indicate a complex ferrimagnetic behaviour with Ga composition. The Co moment decreases in size with Ga concentration, as does the Curie temperature.

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Published date: January 1998
Organisations: Nanoelectronics and Nanotechnology

Identifiers

Local EPrints ID: 256310
URI: http://eprints.soton.ac.uk/id/eprint/256310
PURE UUID: 8cd9cb38-9270-440c-8d1f-fff8bb3ad721
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: 03 Dec 2019 01:52

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Contributors

Author: L. Giovanelli
Author: O. Moze
Author: W.A. Knockelmann
Author: C.H. de Groot ORCID iD
Author: F.R. de Boer
Author: K.H.J. Buschow

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