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Magnetic and structural instabilities in CePd2Al2 and LaPd2Al2

Magnetic and structural instabilities in CePd2Al2 and LaPd2Al2
Magnetic and structural instabilities in CePd2Al2 and LaPd2Al2
We have investigated the crystal and magnetic structure of the RPd2Al2 compounds (R=La, Ce) by neutron powder diffraction (ND) and inelastic neutron scattering (INS). The ND study shows that both compounds undergo a structural phase transition from tetragonal to orthorhombic symmetry at 91.5 K (La) and 13.5 K (Ce). In the case of CePd2Al2 the crystal field excitation spectrum, which has an extra peak that cannot be explained by a standard crystal field model, indicates the presence of strong magneto-elastic coupling.
0921-4526
819-820
Chapon, L.C.
c07fa1c9-cab1-4bd8-832e-0eb2d050cfa7
Goremychkin, E.A.
37f2b8ac-14dc-4957-9864-b490d9853451
Osborn, R.
12b613a4-baca-43c0-835f-9dc31a5e6a90
Rainford, B.D.
a57f1153-bbba-49a3-bffc-0d96087156a0
Short, S.
26876111-402f-4cf6-83f4-7a9d64c4ea82
Chapon, L.C.
c07fa1c9-cab1-4bd8-832e-0eb2d050cfa7
Goremychkin, E.A.
37f2b8ac-14dc-4957-9864-b490d9853451
Osborn, R.
12b613a4-baca-43c0-835f-9dc31a5e6a90
Rainford, B.D.
a57f1153-bbba-49a3-bffc-0d96087156a0
Short, S.
26876111-402f-4cf6-83f4-7a9d64c4ea82

Chapon, L.C., Goremychkin, E.A., Osborn, R., Rainford, B.D. and Short, S. (2006) Magnetic and structural instabilities in CePd2Al2 and LaPd2Al2. Physica B: Condensed Matter, 378-380, 819-820. (doi:10.1016/j.physb.2006.01.300).

Record type: Article

Abstract

We have investigated the crystal and magnetic structure of the RPd2Al2 compounds (R=La, Ce) by neutron powder diffraction (ND) and inelastic neutron scattering (INS). The ND study shows that both compounds undergo a structural phase transition from tetragonal to orthorhombic symmetry at 91.5 K (La) and 13.5 K (Ce). In the case of CePd2Al2 the crystal field excitation spectrum, which has an extra peak that cannot be explained by a standard crystal field model, indicates the presence of strong magneto-elastic coupling.

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More information

Published date: 2006
Additional Information: Proceedings of the International Conference on Strongly Correlated Electron Systems - SCES 2005.

Identifiers

Local EPrints ID: 57135
URI: http://eprints.soton.ac.uk/id/eprint/57135
ISSN: 0921-4526
PURE UUID: a1ebb99f-d283-4cc3-a5d0-1eec0b606f28

Catalogue record

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

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