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25 April 2024 |
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Article overview
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Thermodynamic Properties of the Frustrated Spin-chain Compound Linarite PbCuSO$_4$(OH)$_2$ | | M. Schäpers
; A.U.B. Wolter
; S.-L. Drechsler
; S. Nishimoto
; M. Abdel-Hafiez
; W. Schottenhamel
; B. Büchner
; J. Richter
; B. Ouladdiaf
; M. Uhlarz
; R. Beyer
; Y. Skourski
; J. Wosnitza
; K.C. Rule
; H. Ryll
; B. Klemke
; K. Kiefer
; M. Reehuis
; B. Willenberg
; S. Süllow
; | | Date: |
29 May 2013 | | Abstract: | We present an extensive macroscopic thermodynamic study of the
quasi-one-dimensional (1D) $s = frac{1}{2}$ frustrated spin-chain system
linarite. Susceptibility, magnetization, specific heat, magnetocaloric effect,
magnetostriction, and thermal-expansion measurements were performed to
characterize the magnetic phase diagram. In particular, for magnetic fields
along the b axis five different magnetic regions have been detected, some of
them exhibiting short-range-order effects. The experimental magnetic entropy
and magnetization are compared to a theoretical modelling of these quantities
using DMRG and TMRG approaches. Within the framework of a purely 1D isotropic
model Hamiltonian, only a qualitative agreement between theory and the
experimental data can be achieved. Instead, it is demonstrated that a
significant symmetric exchange anisotropy of about 10,% is necessary to
account for the basic experimental observations, including the 3D saturation
field, and which in turn might stabilize a triatic (three-magnon) multipolar
phase, which so far could never be studied experimentally in such quasi-1D
systems. | | Source: | arXiv, 1305.6731 | | Services: | Forum | Review | PDF | Favorites | |
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