@article{oai:kyutech.repo.nii.ac.jp:00005015,
 author = {Kohiki, Shigemi and 古曵, 重美 and Kinoshita,  Tomoki and Nara,  Koichiro and Akiyama-Hasegawa,  Kotone and Mitome,  Masanori},
 issue = {22},
 journal = {ACS Applied Materials & Interfaces},
 month = {Oct},
 note = {An oleic acid-coated Fe3O4 nanocrystal self-assembled film was fabricated via drop casting of colloidal particles on a SiO2/Si substrate. The film exhibited bifurcation of the zero-field-cooled and field-cooled magnetizations around 250 K. The nonlinear current-voltage (I–V) characteristics between the source and drain electrodes in both zero and non-zero magnetic fields (H) were observed above and below the bifurcation temperature. A large negative magnetoresistance (MR ≈ −60%) was achieved at 200 K and H = 1 T. Even at 295 K and 0.2 T, the negative MR (≈ −50%) persisted. A Fowler–Nordheim plot and power-law scaling of the I–V characteristics revealed that the current flows through two-dimensional (2D) percolated electron tunneling paths. The enlargement of MR can be attributed to spin-dependent electron tunneling between magnetically coupled Fe3O4 nanocrystals self-assembled in 2D ordered arrays.},
 pages = {11584--11589},
 title = {Large, Negative Magnetoresistance in an Oleic Acid-Coated Fe3O4 Nanocrystal Self-Assembled Film},
 volume = {5},
 year = {2013},
 yomi = {コヒキ, シゲミ}
}