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Title: Field-induced length changes in the spin-liquid candidate kappa{BEDT-TTF){<_2}Cu{<_2}(CN){<_3}.

Abstract

Measurements of the coefficient of thermal expansion on the spin-liquid candidate {kappa}-(BEDT-TTF){sub 2}Cu{sub 2}(CN){sub 3} have revealed distinct and strongly anisotropic lattice effects around 6 K - a possible spin liquid instability. In order to study the effects of a magnetic field on the low-temperature spin-liquid state, dilatometric measurements have been conducted both as a function of temperature at B = const. and as a function of field at T = const. While the 6 K anomaly is found to be insensitive to magnetic fields B {le} 10 T, the maximum field applied, surprisingly strong B-induced effects are observed for magnetic fields applied along the in-plane b-axis. Above a threshold field of 0.5 T < B{sub c} {le} 1 T, a jump-like anomaly is observed in the b-axis lattice parameter. This anomaly, which is located at 8.7 K at B = 1 T, grows in size and shifts to lower temperatures with increasing the magnetic field. Although the anomaly bears resemblance to a first-order phase transition, the lack of hysteresis suggests otherwise.

Authors:
; ; ;  [1]
  1. Materials Science Division
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC); German Science Foundation
OSTI Identifier:
1047447
Report Number(s):
ANL/MSD/JA-71074
Journal ID: ISSN 1610-1634; TRN: US201216%%293
DOE Contract Number:  
DE-AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Physics Status Solidi C
Additional Journal Information:
Journal Volume: 9; Journal Issue: 5; Journal ID: ISSN 1610-1634
Country of Publication:
United States
Language:
ENGLISH
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; HYSTERESIS; INSTABILITY; LATTICE PARAMETERS; MAGNETIC FIELDS; SPIN; THERMAL EXPANSION

Citation Formats

Manna, R S, de Souza, M, Schlueter, J A, Lang, M, Goethe-Univ. Frankfurt, and Univ.Estadual Paulista). Field-induced length changes in the spin-liquid candidate kappa{BEDT-TTF){<_2}Cu{<_2}(CN){<_3}.. United States: N. p., 2012. Web. doi:10.1002/pssc.201100643.
Manna, R S, de Souza, M, Schlueter, J A, Lang, M, Goethe-Univ. Frankfurt, & Univ.Estadual Paulista). Field-induced length changes in the spin-liquid candidate kappa{BEDT-TTF){<_2}Cu{<_2}(CN){<_3}.. United States. https://doi.org/10.1002/pssc.201100643
Manna, R S, de Souza, M, Schlueter, J A, Lang, M, Goethe-Univ. Frankfurt, and Univ.Estadual Paulista). 2012. "Field-induced length changes in the spin-liquid candidate kappa{BEDT-TTF){<_2}Cu{<_2}(CN){<_3}.". United States. https://doi.org/10.1002/pssc.201100643.
@article{osti_1047447,
title = {Field-induced length changes in the spin-liquid candidate kappa{BEDT-TTF){<_2}Cu{<_2}(CN){<_3}.},
author = {Manna, R S and de Souza, M and Schlueter, J A and Lang, M and Goethe-Univ. Frankfurt and Univ.Estadual Paulista)},
abstractNote = {Measurements of the coefficient of thermal expansion on the spin-liquid candidate {kappa}-(BEDT-TTF){sub 2}Cu{sub 2}(CN){sub 3} have revealed distinct and strongly anisotropic lattice effects around 6 K - a possible spin liquid instability. In order to study the effects of a magnetic field on the low-temperature spin-liquid state, dilatometric measurements have been conducted both as a function of temperature at B = const. and as a function of field at T = const. While the 6 K anomaly is found to be insensitive to magnetic fields B {le} 10 T, the maximum field applied, surprisingly strong B-induced effects are observed for magnetic fields applied along the in-plane b-axis. Above a threshold field of 0.5 T < B{sub c} {le} 1 T, a jump-like anomaly is observed in the b-axis lattice parameter. This anomaly, which is located at 8.7 K at B = 1 T, grows in size and shifts to lower temperatures with increasing the magnetic field. Although the anomaly bears resemblance to a first-order phase transition, the lack of hysteresis suggests otherwise.},
doi = {10.1002/pssc.201100643},
url = {https://www.osti.gov/biblio/1047447}, journal = {Physics Status Solidi C},
issn = {1610-1634},
number = 5,
volume = 9,
place = {United States},
year = {Tue May 01 00:00:00 EDT 2012},
month = {Tue May 01 00:00:00 EDT 2012}
}