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Magnetic microphase inhomogeneity as a thermodynamic precursor of ground-state phase separation in weakly coupled spin-3/2 chains

Shen, L. LU ; Campillo, E. LU ; Young, E. ; Bulbucan, C. LU ; Westerström, R. LU ; Laver, M. ; Baker, P. J. and Blackburn, E. LU (2021) In Physical Review B 103(13).
Abstract
γ-CoV2O6 is a quasi-one-dimensional spin-3/2 magnet that possesses two distinct magnetic orders at low temperatures with propagation vectors k1=(½,0,0) and k2=(¼ + δh, δk, - ¼ + δl), respectively. Here we use muon spin relaxation and rotation to reveal the thermodynamics of the magnetic phase separation in this compound. In the paramagnetic (PM) region, short-range correlated spin clusters emerge at Tm ≃ 29 K at the partial expense of the PM volume. Upon further cooling, we show that these emergent clusters become spatially coherent and account for the k2 phase below TN2 = 7.5 K, while the... (More)
γ-CoV2O6 is a quasi-one-dimensional spin-3/2 magnet that possesses two distinct magnetic orders at low temperatures with propagation vectors k1=(½,0,0) and k2=(¼ + δh, δk, - ¼ + δl), respectively. Here we use muon spin relaxation and rotation to reveal the thermodynamics of the magnetic phase separation in this compound. In the paramagnetic (PM) region, short-range correlated spin clusters emerge at Tm ≃ 29 K at the partial expense of the PM volume. Upon further cooling, we show that these emergent clusters become spatially coherent and account for the k2 phase below TN2 = 7.5 K, while the remaining PM spins are driven into the k1 state at TN1 = 6.6 K. These results stress magnetic microphase inhomogeneity as a thermodynamic precursor for the ground-state phase separation in weakly coupled spin-3/2 chains. (Less)
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author
; ; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Low dimensional magnetism, Phase separation
in
Physical Review B
volume
103
issue
13
article number
134420
pages
10 pages
publisher
American Physical Society
external identifiers
  • scopus:85104491095
ISSN
2469-9950
DOI
10.1103/PhysRevB.103.134420
project
Accessing high pressure and low temperature states of exotic magnetism
language
English
LU publication?
yes
id
20159e78-61be-4257-8617-d5cbb9be07b1
date added to LUP
2021-04-16 16:28:55
date last changed
2023-10-10 18:34:46
@article{20159e78-61be-4257-8617-d5cbb9be07b1,
  abstract     = {{<i>γ</i>-CoV<sub>2</sub>O<sub>6</sub> is a quasi-one-dimensional spin-3/2 magnet that possesses two distinct magnetic orders at low temperatures with propagation vectors <i>k</i><sub>1</sub>=(½,0,0) and <i>k</i><sub>2</sub>=(¼ + <i>δh</i>, <i>δk</i>, - ¼ + <i>δl</i>), respectively. Here we use muon spin relaxation and rotation to reveal the thermodynamics of the magnetic phase separation in this compound. In the paramagnetic (PM) region, short-range correlated spin clusters emerge at <i>T</i><sub>m</sub> ≃ 29 K at the <i>partial</i> expense of the PM volume. Upon further cooling, we show that these emergent clusters become spatially coherent and account for the <i>k</i><sub>2</sub> phase below <i>T</i><sub>N2</sub> = 7.5 K, while the remaining PM spins are driven into the <i>k</i><sub>1</sub> state at T<sub>N1</sub> = 6.6 K. These results stress magnetic microphase inhomogeneity as a thermodynamic precursor for the ground-state phase separation in weakly coupled spin-3/2 chains.}},
  author       = {{Shen, L. and Campillo, E. and Young, E. and Bulbucan, C. and Westerström, R. and Laver, M. and Baker, P. J. and Blackburn, E.}},
  issn         = {{2469-9950}},
  keywords     = {{Low dimensional magnetism; Phase separation}},
  language     = {{eng}},
  month        = {{04}},
  number       = {{13}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review B}},
  title        = {{Magnetic microphase inhomogeneity as a thermodynamic precursor of ground-state phase separation in weakly coupled spin-3/2 chains}},
  url          = {{http://dx.doi.org/10.1103/PhysRevB.103.134420}},
  doi          = {{10.1103/PhysRevB.103.134420}},
  volume       = {{103}},
  year         = {{2021}},
}