Low-temperature structural phase transition in a monoclinic KDy(WO4)2 crystal

V. P. D'yakonov; V. I. Markovich; V. L. Kovarskiǐ; A. V. Markovich; M. Borowiec; A. Jedrzejczak; H. Szymczak

doi:10.1134/1.1130382

Low-temperature structural phase transition in a monoclinic KDy(WO₄)₂ crystal

V. P. D'yakonov, V. I. Markovich, V. L. Kovarskiǐ, A. V. Markovich, M. Borowiec, A. Jedrzejczak, H. Szymczak

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Abstract

The low-temperature thermal and magnetic-resonance properties of a monoclinic KDy(WO₄)₂ single crystal are investigated. It is established that a structural phase transition takes place at T_c = 6.38 K. The field dependence of the critical temperature is determined for a magnetic field oriented along the crystallographic a and c axes. The initial part of the H-T phase diagram is plotted for H∥a. The prominent features of the structural phase transition are typical of a second-order Jahn-Teller transition, which is not accompanied by any change in the symmetry of the crystal lattice in the low-temperature phase. The behavior of C(T) in a magnetic field shows that the transition goes to an antiferrodistortion phase. An anomalous increase in the relaxation time (by almost an order of magnitude) following a thermal pulse is observed at T>T_C(H), owing to the structural instability of the lattice. A theoretical model is proposed for the structural phase transition in a magnetic field, and the magnetic-field dependence of T_c is investigated for various directions of the field.

Original language	English
Pages (from-to)	691-698
Number of pages	8
Journal	Physics of the Solid State
Volume	40
Issue number	4
DOIs	https://doi.org/10.1134/1.1130382
State	Published - 1 Jan 1998
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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@article{9795ac41f69f485287a3f93d9ca3ee2c,

title = "Low-temperature structural phase transition in a monoclinic KDy(WO4)2 crystal",

abstract = "The low-temperature thermal and magnetic-resonance properties of a monoclinic KDy(WO4)2 single crystal are investigated. It is established that a structural phase transition takes place at Tc = 6.38 K. The field dependence of the critical temperature is determined for a magnetic field oriented along the crystallographic a and c axes. The initial part of the H-T phase diagram is plotted for H∥a. The prominent features of the structural phase transition are typical of a second-order Jahn-Teller transition, which is not accompanied by any change in the symmetry of the crystal lattice in the low-temperature phase. The behavior of C(T) in a magnetic field shows that the transition goes to an antiferrodistortion phase. An anomalous increase in the relaxation time (by almost an order of magnitude) following a thermal pulse is observed at T>TC(H), owing to the structural instability of the lattice. A theoretical model is proposed for the structural phase transition in a magnetic field, and the magnetic-field dependence of Tc is investigated for various directions of the field.",

author = "D'yakonov, {V. P.} and Markovich, {V. I.} and Kovarskiǐ, {V. L.} and Markovich, {A. V.} and M. Borowiec and A. Jedrzejczak and H. Szymczak",

note = "Funding Information: The work of authors M. Borowiec, A. Jedrzejczak, and H. Szymczak has received partial support from the State Committee for Scientific Research of Poland (Komitet Badan Naukowych) (KBN Contract N 2 PO3B 071 08).",

year = "1998",

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doi = "10.1134/1.1130382",

language = "English",

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pages = "691--698",

journal = "Physics of the Solid State",

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TY - JOUR

T1 - Low-temperature structural phase transition in a monoclinic KDy(WO4)2 crystal

AU - D'yakonov, V. P.

AU - Markovich, V. I.

AU - Kovarskiǐ, V. L.

AU - Markovich, A. V.

AU - Borowiec, M.

AU - Jedrzejczak, A.

AU - Szymczak, H.

N1 - Funding Information: The work of authors M. Borowiec, A. Jedrzejczak, and H. Szymczak has received partial support from the State Committee for Scientific Research of Poland (Komitet Badan Naukowych) (KBN Contract N 2 PO3B 071 08).

PY - 1998/1/1

Y1 - 1998/1/1

N2 - The low-temperature thermal and magnetic-resonance properties of a monoclinic KDy(WO4)2 single crystal are investigated. It is established that a structural phase transition takes place at Tc = 6.38 K. The field dependence of the critical temperature is determined for a magnetic field oriented along the crystallographic a and c axes. The initial part of the H-T phase diagram is plotted for H∥a. The prominent features of the structural phase transition are typical of a second-order Jahn-Teller transition, which is not accompanied by any change in the symmetry of the crystal lattice in the low-temperature phase. The behavior of C(T) in a magnetic field shows that the transition goes to an antiferrodistortion phase. An anomalous increase in the relaxation time (by almost an order of magnitude) following a thermal pulse is observed at T>TC(H), owing to the structural instability of the lattice. A theoretical model is proposed for the structural phase transition in a magnetic field, and the magnetic-field dependence of Tc is investigated for various directions of the field.

AB - The low-temperature thermal and magnetic-resonance properties of a monoclinic KDy(WO4)2 single crystal are investigated. It is established that a structural phase transition takes place at Tc = 6.38 K. The field dependence of the critical temperature is determined for a magnetic field oriented along the crystallographic a and c axes. The initial part of the H-T phase diagram is plotted for H∥a. The prominent features of the structural phase transition are typical of a second-order Jahn-Teller transition, which is not accompanied by any change in the symmetry of the crystal lattice in the low-temperature phase. The behavior of C(T) in a magnetic field shows that the transition goes to an antiferrodistortion phase. An anomalous increase in the relaxation time (by almost an order of magnitude) following a thermal pulse is observed at T>TC(H), owing to the structural instability of the lattice. A theoretical model is proposed for the structural phase transition in a magnetic field, and the magnetic-field dependence of Tc is investigated for various directions of the field.

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U2 - 10.1134/1.1130382

DO - 10.1134/1.1130382

M3 - Article

AN - SCOPUS:0032392923

SN - 1063-7834

VL - 40

SP - 691

EP - 698

JO - Physics of the Solid State

JF - Physics of the Solid State

IS - 4

ER -

Low-temperature structural phase transition in a monoclinic KDy(WO₄)₂ crystal

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