UNSPECIFIED (1996) High resolution neutron scattering study of low-energy magnetic excitations in Nd2-xCexCuO4. ANNALEN DER PHYSIK, 5 (2). pp. 197-202. ISSN 0003-3804

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Abstract

The low-energy magnetic excitations (HBAR omega less than or equal to 2 meV) of polycrystalline samples of Nd2-xCexCuO4 with x = 0, 0.1 and 0.15 have been measured with high resolution inelastic neutron scattering using time-of-flight technique at temperatures below 0.3 K. All observed scattering originates from transitions within the ground state doublet of Nd3+. For Nd2CuO4 the response is inelastic, and shows at least three different modes, of which one is almost dispersionless. For x = 0.1 the excitation spectrum shifts towards lower energies, but the main features of the undoped compound are still visible, whereas for x = 0.15 the response is mainly quasi-elastic but remains localised in Q-space around the first magnetic Bragg point (0.5 0.5 1). A comparison with data obtained on a triple-axis-spectrometer on single crystals with x = 0.0 and x = 0.15 reveals that the response of the doped sample in the [0 0 1] direction is still inelastic.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Journal or Publication Title:	ANNALEN DER PHYSIK
Publisher:	JOHANN AMBROSIUS BARTH VERLAG
ISSN:	0003-3804
Date:	1996
Volume:	5
Number:	2
Number of Pages:	6
Page Range:	pp. 197-202
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/18847

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