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Magnetic correlations and the quantum critical point of UCu5-xPdx (x = 1,1.5)

Magnetic correlations and the quantum critical point of UCu5-xPdx (x = 1,1.5)
Magnetic correlations and the quantum critical point of UCu5-xPdx (x = 1,1.5)
We have used inelastic neutron scattering to determine the magnetic susceptibility chi (q, omega ,T) of the non-Fermi-liquid compounds UCu 5-xPdx (x = 1,1.5) for energies omega between 0.2 and 2 meV, and for temperatures T between 1.6 and 250 K. Spatial correlations in both UCu 4Pd and UCu 3.5Pd1.5 extend over length scales comparable to the unit cell, and display very little temperature dependence. In contrast, the wave vector independent susceptibility diverges as T-->0. We find that the excitations at all q, and for all T and omega accessed display the same type of non-Fermi-liquid omega /T scaling.
197205-[4pp]
Aronson, M.C.
5aa3c95b-2a54-46fb-a423-6a2f15c62ef0
Osborn, R.
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Chau, R.
ea1fd6d9-ab6a-4f15-be13-8f2c367c12e3
Maple, M.B.
22b07b12-e462-4d16-ae9b-6d16da1b040e
Rainford, B.D.
a57f1153-bbba-49a3-bffc-0d96087156a0
Murani, A.P.
1ecc684b-8aec-4c36-93cf-7a584ede1c0a
Aronson, M.C.
5aa3c95b-2a54-46fb-a423-6a2f15c62ef0
Osborn, R.
12b613a4-baca-43c0-835f-9dc31a5e6a90
Chau, R.
ea1fd6d9-ab6a-4f15-be13-8f2c367c12e3
Maple, M.B.
22b07b12-e462-4d16-ae9b-6d16da1b040e
Rainford, B.D.
a57f1153-bbba-49a3-bffc-0d96087156a0
Murani, A.P.
1ecc684b-8aec-4c36-93cf-7a584ede1c0a

Aronson, M.C., Osborn, R., Chau, R., Maple, M.B., Rainford, B.D. and Murani, A.P. (2001) Magnetic correlations and the quantum critical point of UCu5-xPdx (x = 1,1.5). Physical Review Letters, 87 (19), 197205-[4pp]. (doi:10.1103/PhysRevLett.87.197205).

Record type: Article

Abstract

We have used inelastic neutron scattering to determine the magnetic susceptibility chi (q, omega ,T) of the non-Fermi-liquid compounds UCu 5-xPdx (x = 1,1.5) for energies omega between 0.2 and 2 meV, and for temperatures T between 1.6 and 250 K. Spatial correlations in both UCu 4Pd and UCu 3.5Pd1.5 extend over length scales comparable to the unit cell, and display very little temperature dependence. In contrast, the wave vector independent susceptibility diverges as T-->0. We find that the excitations at all q, and for all T and omega accessed display the same type of non-Fermi-liquid omega /T scaling.

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Published date: 5 November 2001
Organisations: Quantum, Light & Matter Group

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Local EPrints ID: 14680
URI: https://eprints.soton.ac.uk/id/eprint/14680
PURE UUID: 2b3cff0b-04b5-49af-ade3-3abf4b8e83e5

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Date deposited: 18 Feb 2005
Last modified: 19 Jul 2019 19:19

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