Magnetostriction of the spin-Peierls compound CuGeO3
Leonyuk, L. I. ; Levitin, R. Z. ; Ponomarenko, L. A. ; Snegirev, V. V. ; Vasil’ev, A. N. ; Dhalenne, G. ; Revcolevschi, A.
Springer
Published 1996
Springer
Published 1996
| ISSN: |
1090-6487
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|---|---|
| Keywords: |
75.30.Kz ; 75.80.+q
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| Source: |
Springer Online Journal Archives 1860-2000
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| Topics: |
Physics
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| Notes: |
Abstract The longitudinal and transverse magnetostriction λ of the spin-Peierls compound CuGeO3 in the b-c plane is measured in magnetic fields up to 20 T both above and below the transition temperature T sp=14.3K. It is found that for a given crystallographic direction the value of magnetostriction is weakly dependent on the magnetic field direction. In the uniform U phase at T⩾T sp, λ is negative and approximately equal in the b and c directions, while in the dimerized D phase at T〈T sp, λ is positive and λ b 〉λ c . At low temperatures, λ increases sharply at the magnetic-field-induced transition from the dimerized to the magnetic M phase. The experimental data allow estimation of the stress derivatives of the antiferromagnetic intrachain exchange interaction parameter and of the stress dependence of the critical field of the D-Mphase transition.
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| Type of Medium: |
Electronic Resource
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| URL: |