Shaped Crystal Growth of Fe-Al Alloy Plates by Micro Pulling down Method

K. Kamadaa, b, R. Murakamib, M. Arakawac, T. Minamitanid, T. Uenod, Y. Shojib, e, A. Yamajie, M. Yoshinob, e, S. Kurosawaa, e, Y. Yokotaa, Y. Ohashie, V.V. Kochurikhinf, A. Yoshikawaa, b, e aNew Industry Creation Hatchery Center, Tohoku University, Sendai, 980-8577, Japan bC & A Corporation, Sendai, 980-8579, Japan cGraduate School of Biomedical Engineering, Tohoku University, Sendai, 980-8577, Japan dKanazawa University, Kanazawa, 920-1192, Japan eInstitute for Materials Research, Tohoku University, Sendai, 980-8577, Japan fGeneral Physics InstituteRussian Academy of Sciences, 38 Vavilov Str., 119991 Moscow, Russia

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Plate shaped Fe-Al alloy crystals were successfully grown using the μ-PD method. The orientation and grain size could be controlled by using the well oriented Fe0.95Al0.05 seed crystal. The as-grown Fe0.82Al0.18 and Fe0.80Al0.20 showed the magnetostriction 3/2λ=121 and 149 ppm, respectively, which is comparable to the values for single crystal samples grown by the Bridgman-Stockbarger method. Distributions of Fe and Al were homogenous along the growth direction within standard deviations of 0.35% and 1.3%, respectively. A prototype vibration energy harvester was demonstrated using the grown Fe-Al alloys.

DOI:10.12693/APhysPolA.137.1009 topics: μ-PD method, crystal growth, Fe-Al alloy, magnetostriction, vibration energy harvester