A Nuclear Magnetic Resonance Study on Rubrene-cobalt Nano-composites
  We implemented a nuclear magnetic resonance (NMR) study on rubrene(C42H28)-Co nano-composites that exhibit an enhanced magnetoresistance (MR) ratio of 80%. The 59Co NMR spin echo experiment enabled clarification of the hyperfine field of Co at the interface between the ferromagnet and the molecules, which has not been investigated for molecular spintronics. An enhanced hyperfine field of the Co was observed in the rubrene-Co nano-composites, which may be related to the enhancement of the MR ratio. This study demonstrates the importance of microscopic investigation of the interface between molecules and ferromagnets that governs spin-dependent transport in molecular spin devices. 
Masashi Shiraishi, Haruka Kusai, Ryo Nouchi, Takayuki Nozaki, Teruya   Shinjo, Yoshishige Suzuki, Makoto Yoshida, Masashi Ta...