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A study of the anti-ferromagnetic quadrupolar ordering in (DyB2C2)-B-11 through inelastic neutron scattering

A study of the anti-ferromagnetic quadrupolar ordering in (DyB2C2)-B-11 through inelastic neutron scattering
A study of the anti-ferromagnetic quadrupolar ordering in (DyB2C2)-B-11 through inelastic neutron scattering
Inelastic neutron scattering measurements have been carried out to investigate the crystal field (CF) excitations of DyB2C2 in order to understand the mechanisms of the quadrupolar ordering (TQ) observed at 24.7 K. Our analysis shows that the ground state is made up of nearly degenerate two Kramer doublets forming a ‘quasi-quartet’ ground state. This is consistent with heat capacity measurements, which have shown an estimated entropy of Rln2 at TN (15.3 K) and an additional Rln2 at TQ. A considerable shift and change in the width of the CF excitations and the splitting of the quasi-quartet ground state into two well-resolved doublets below TQ as well as a Zeeman splitting below TN have also been observed.
0921-4526
968-970
Hillier, A.D.
89e88dd9-6b7a-4b1d-a399-99b5bc301e9a
Adroja, D.T.
8eaa8fab-9acb-420b-af27-918d6fd01a70
Manuel, P.
97138ae6-9ad7-417c-bc56-7402a7de9e3f
Bewley, R.I.
737eb157-f5d9-4cc0-bea2-d53c194a998e
Kockelmann, W.
da5cf7f6-dd23-4909-b567-2b54a7a72930
Rainford, B.D.
a57f1153-bbba-49a3-bffc-0d96087156a0
Hillier, A.D.
89e88dd9-6b7a-4b1d-a399-99b5bc301e9a
Adroja, D.T.
8eaa8fab-9acb-420b-af27-918d6fd01a70
Manuel, P.
97138ae6-9ad7-417c-bc56-7402a7de9e3f
Bewley, R.I.
737eb157-f5d9-4cc0-bea2-d53c194a998e
Kockelmann, W.
da5cf7f6-dd23-4909-b567-2b54a7a72930
Rainford, B.D.
a57f1153-bbba-49a3-bffc-0d96087156a0

Hillier, A.D., Adroja, D.T., Manuel, P., Bewley, R.I., Kockelmann, W. and Rainford, B.D. (2005) A study of the anti-ferromagnetic quadrupolar ordering in (DyB2C2)-B-11 through inelastic neutron scattering. Physica B: Condensed Matter, 359, 968-970. (doi:10.1016/j.physb.2005.01.279).

Record type: Article

Abstract

Inelastic neutron scattering measurements have been carried out to investigate the crystal field (CF) excitations of DyB2C2 in order to understand the mechanisms of the quadrupolar ordering (TQ) observed at 24.7 K. Our analysis shows that the ground state is made up of nearly degenerate two Kramer doublets forming a ‘quasi-quartet’ ground state. This is consistent with heat capacity measurements, which have shown an estimated entropy of Rln2 at TN (15.3 K) and an additional Rln2 at TQ. A considerable shift and change in the width of the CF excitations and the splitting of the quasi-quartet ground state into two well-resolved doublets below TQ as well as a Zeeman splitting below TN have also been observed.

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Published date: 2005

Identifiers

Local EPrints ID: 57303
URI: http://eprints.soton.ac.uk/id/eprint/57303
ISSN: 0921-4526
PURE UUID: 86ceecfe-530f-4113-bb5e-45de1ad10e5c

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Date deposited: 13 Aug 2008
Last modified: 13 Mar 2019 20:34

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