Skip to main content

Sample independence of magnetoelastic excitations in the rare-earth pyrochlore Tb 2 Ti 2 O 7

Author(s): Ruminy, M.; Bovo, Laura; Pomjakushina, Ekaterina V.; Haas, M.K.; Stuhr, Uwe; et al

To refer to this page use:
Abstract: Recent experimental results have emphasized two aspects of Tb2Ti2O7, which have not been taken into account in previous attempts to construct theories of Tb2Ti2O7: the role of small levels of structural disorder, which appears to control the formation of a long-range ordered state of as yet unknown nature, and the importance of strong coupling between spin and lattice degrees of freedom, which results in the hybridization of crystal-field excitons and transverse acoustic phonons. In this work, we examine the juncture of these two phenomena and show that samples with strongly contrasting behavior vis-a-vis the structural disorder (i.e., with and without the transition to the ordered state), develop identical magnetoelastic coupling. We also show that the comparison between single-crystal and powder samples is more complicated than previously thought - the correlation between the lattice parameter (as a measure of superstoichiometric Tb3+) and the existence of a specific heat peak, as observed in powder samples, does not hold for single crystals. © 2016 American Physical Society.
Publication Date: Apr-2016
Electronic Publication Date: 6-Apr-2016
Citation: Ruminy, M., Bovo, L., Pomjakushina, E., Haas, M.K., Stuhr, U., Cervellino, A., Cava, R.J., Kenzelmann, M., Fennell, T. (2016). Sample independence of magnetoelastic excitations in the rare-earth pyrochlore. Physical Review B, 93 (14), 10.1103/PhysRevB.93.144407
DOI: doi:10.1103/PhysRevB.93.144407
ISSN: 2469-9950
EISSN: 2469-9969
Pages: 93.14:144407-1 - 144407-8
Type of Material: Journal Article
Journal/Proceeding Title: Physical Review B
Version: Final published version. Article is made available in OAR by the publisher's permission or policy.
Notes: Physical Review B. Volume 93, Issue 14, 6 April 2016, Article number 144407.

Items in OAR@Princeton are protected by copyright, with all rights reserved, unless otherwise indicated.