Shinya Morita

Elastic anomaly around a ferromagnetic transition in Y1-xCaxTiO3 (x=0–0.2)

We measured temperature dependence of elastic modulus for the high-quality single crystals of Y1-xCaxTiO3Y1-xCaxTiO3 (x=0,0.1x=0,0.1 and 0.2) using an ultrasonic technique. A step like elastic anomaly due to the volume magnetostriction induced by a ferromagnetic transition was observed in longitudinal C11C11 and C33C33 for x=0x=0 and 0.1, although no anomaly was observed for x=0.2x=0.2. With increasing xx, the magnitude of anomaly decreases, reflecting that the amplitude of the antiferromagnetic orbital order parameter, where the orbital ordering is the origin of the ferromagnetism of YTiO3, is reduced with increasing Ca concentration.

Elastic anomaly around a ferromagnetic transition in Y1-xCaxTiO3Y1-xCaxTiO3 (x=0x=0–0.2)

We measured temperature dependence of elastic modulus for the high-quality single crystals of Y1-xCaxTiO3Y1-xCaxTiO3 (x=0,0.1x=0,0.1 and 0.2) using an ultrasonic technique. A step like elastic anomaly due to the volume magnetostriction induced by a ferromagnetic transition was observed in longitudinal C11C11 and C33C33 for x=0x=0 and 0.1, although no anomaly was observed for x=0.2x=0.2. With increasing xx, the magnitude of anomaly decreases, reflecting that the amplitude of the antiferromagnetic orbital order parameter, where the orbital ordering is the origin of the ferromagnetism of YTiO3, is reduced with increasing Ca concentration.

Elastic anomaly around a ferromagnetic transition in (–0.2)

We measured temperature dependence of elastic modulus for the high-quality single crystals of Y1-xCaxTiO3Y1-xCaxTiO3 (x=0,0.1x=0,0.1 and 0.2) using an ultrasonic technique. A step like elastic anomaly due to the volume magnetostriction induced by a ferromagnetic transition was observed in longitudinal C11C11 and C33C33 for x=0x=0 and 0.1, although no anomaly was observed for x=0.2x=0.2. With increasing xx, the magnitude of anomaly decreases, reflecting that the amplitude of the antiferromagnetic orbital order parameter, where the orbital ordering is the origin of the ferromagnetism of YTiO3, is reduced with increasing Ca concentration.