Low-field magnetic anisotropy in Molt-insulating ferromagnet Y1-xCaxTiO3 (x <= 0.1)

YTiO3 has been known as a Mort-insulating ferromagnet with the Curie temper ature T-c = 30 K. We have measured the magnetization of single crystals of Y1-xCaxTiO3 (x = 0, 0.01. 0.02, 0.05, 0.10) grown by a floating-zone method . In YTiO3. a metamagnetic-like transition was observed for B\\a and B\\c ( easy axis) at 1.5 and 7.5 mT, respectively. only after zero-field cooling. For B\\b (hard axis), however, no metamagnetic behavior appears. From the m agnetization measurements of alloys, it is found that the anisotropy in mag netization for B\\a and B\\c vanishes with increasing x up to 0.1. (C) 2000 Elsevier Science B.V. All rights reserved.