Uniaxial pressure dependencies of the phase transitions in GdMnO${}_3$

Abstract

GdMnO${}_3$ shows an incommensurate antiferromagnetic order below $\simeq 42$ K, transforms into a canted A-type antiferromagnet below $\simeq 20$ K, and for finite magnetic fields along the b axis ferroelectric order occurs below $\simeq 12$ K. From high-resolution thermal expansion measurements along all three principal axes, we determine the uniaxial pressure dependencies of the various transition temperatures and discuss their correlation to changes of the magnetic exchange couplings in $R$MnO${}_3$ ($R=\mathrm{La},...Dy$).

arXiv comment2 pages, 3 figures, submitted to JMMM (Proceedings of ICM'06, Kyoto)

References in corpus (4)

• Ferroelectricity in spiral magnets
• Distorted Perovskite with e_g^1 Configuration as a Frustrated Spin System
• Complex interplay of 3d and 4f magnetism in La:GdMnO3
• Hysteresis effects in the phase diagram of multiferroic GdMnO${}_3$

Cited by in corpus (2)

• New features in the phase diagram of TbMnO${}_3$
• Anomalous thermal expansion and strong damping of the thermal conductivity of NdMnO${}_3$ and TbMnO${}_3$ due to 4f crystal-field excitations