Long-term potentiation of magnonic synapses by photocontrolled spin current mimicked in reentrant spin-glass garnet ferrite Lu3Fe5-2xCoxSixO12 thin films

作者：Adachi Masaki; Seki Munetoshi^*; Yamahara Hiroyasu; Nasu Hidekazu; Tabata Hitoshi

来源：Applied Physics Express, 2015, 8(4): 043002.

DOI：10.7567/APEX.8.043002

(Co, Si)-cosubstituted Lu3Fe5O12 (Lu3Fe5-2xCoxSixO12; 0.00 <= x <= 1.00) thin films were grown on Y3Al5O12(001) substrates by pulsed laser deposition. Reentrant spin-glass behavior was observed and its robustness against external magnetic fields was improved by increasing the Co-Si content. In contrast, the spectral linewidth of ferromagnetic resonance was broadened by increasing the Co-Si content, which indicates that the Lu3Fe4.8Co0.1Si0.1O12 thin film is an optimal spin-glass spin-wave conductor. The spin pumping voltage of Lu3Fe4.8Co0.1Si0.1O12 exhibited shortterm plasticity with photoinduced magnetic anisotropy and long-term potentiation with the photomemory effect, which mimicked the pre- and postsynaptic potentials of biological systems.

• 出版日期2015-4