Spin fluctuations in Y1-xScxMn2 and Y(Mn1-xAlx)(2) observed by perturbed-angular-correlation spectroscopy

Authors
Demuynck, S Mishra, SN Tulapurkar, AA Cottenier, S Meersschaut, J Rots, M
Citation
S. Demuynck et al., Spin fluctuations in Y1-xScxMn2 and Y(Mn1-xAlx)(2) observed by perturbed-angular-correlation spectroscopy, PHYSICA B, 293(3-4), 2001, pp. 376-381
Citations number
13
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA B
ISSN journal
09214526 → ACNP
Volume
293
Issue
3-4
Year of publication
2001
Pages
376 - 381
Database
ISI
SICI code
0921-4526(200101)293:3-4<376:SFIYAY>2.0.ZU;2-3
Abstract
We have made investigations of the magnetic interactions of Mn spins in the geometrically frustrated Laves-phase compounds Y0.96Sc0.04Mn2 and Y(Mn0.97 Al0.03)(2) by measuring the magnetic hyperfine field on Cd-111 as a functio n of temperature and applied magnetic field using perturbed-angular-correla tion (PAC) spectroscopy. In Y0.96Sc0.04Mn2 we find evidence for short-range magnetic correlations with a broad distribution of spin-relaxation times, consistent with spin-liquid-like behaviour. In Y(Mn0.97Al0.03)(2) the resul ts reveal static Mn spins developing long-range magnetic ordering in a spin -glass state below 115 K. (C) 2001 Elsevier Science B.V, All rights reserve d.