Abstract
We report the degrees of biaxial orientation for (Y1−xErx)Ba2Cu3Oy [(Y1−xErx)123] powder samples aligned in epoxy resin under a modulated rotating magnetic field of 10 T at room temperature. Although the triaxial magnetic anisotropy of ErBa2Cu3Oy was found to be approximately 20 times higher than that of YBa2Cu3Oy, the orientation degrees for (Y1−xErx)123 powder samples decreased with x. In the fabrication of (Y1−xErx)123 powders, sintering temperature is one of the parameters that predominantly affect orientation degree, and the sintering at temperatures close to the peritectic temperature leads to improvement of the orientation degree. In the case of the biaxial magnetic alignment of REBa2Cu3Oy (RE123: RE, rare-earth element) powders, the reduction of in-plane magnetic anisotropy induced by twin microstructures at the RE123 grain level should be taken into account. Therefore, in this study, we clarified that the fabrication processes of RE123 powders are important in addition to the control of the chemical composition using RE ions with high magnetic anisotropy.
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