Long annealing effect on spin Seebeck devices fabricated using Ce_xY_(3_x)Fe_5O_(12) deposited by metal-organic decomposition

摘要

The effects of Ce content and annealing temperature on the electromotive force produced by spin Seebeck devices fabricated using CexY(3-x)Fe(5)O(12) deposited by metal-organic decomposition was investigated. The Ce content was first varied (x = 0; 1; 2; 3) for a fixed annealing condition of 3 h at 900 degrees C. It was found that increasing the Ce content led to a decrease in electromotive force, which meant that x = 0 was the optimum Ce content. Next, the effect of annealing temperature was investigated for a Ce1Y2Fe5O12 film for an annealing time of 14 h. The highest electromotive force of 24.0 mu V/ 50 degrees C was obtained for a sample annealed for 14 h at 800 degrees C, although the X-ray diffraction peaks were weaker than those for a sample annealed for 14 h at 950 degrees C. (C) 2018 The Japan Society of Applied Physics.