Optical birefringence and successive phase transitions of hexagonal ABX3 -type antiferromagnets with spin frustration
Iio, K. ; Sano, M. ; Tanaka, H. ; Nagata, K.
[S.l.] : American Institute of Physics (AIP)
Published 1988
[S.l.] : American Institute of Physics (AIP)
Published 1988
| ISSN: |
1089-7550
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|---|---|
| Source: |
AIP Digital Archive
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| Topics: |
Physics
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| Notes: |
To investigate the successive ordering processes of the triangular lattice antiferromagnet CsNiCl3, a Heisenberg system with an easy-axis anisotropy, optical birefringence has been studied on various hexagonal ABX3 systems involving other types of anisotropy. The birefringence for light propagating along the c axis clearly shows that the basal plane component of spins in CsNiCl3 is ordered below the lower Néel point TN2. A cusplike anomaly in the temperature dependence of the birefringence for light propagating perpendicular to the c axis is observed at the upper Néel point TN1 of the Heisenberg system with an easy-axis anisotropy. A plausible explanation for this anomaly is presented in connection with a spin frustration effect.
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| Type of Medium: |
Electronic Resource
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| URL: |