| Presentation | 1997/1/23 Spin-Dependent Tunneling and Hall Effect in Fe-SiO_2 Granular Films T. Okada, T Umemoto, M. Nawate, S. Honda, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We have studied magnetic properties and galvanomagnetic effect of Fe-SiO_2 granular films, prepared by rf sputtering method, as functions of temperature and Fe composition (volume fraction). Magnetoresistance (MR) effct arises from tunneling between Fe grains, depending on the relative orientation of the magnetization, and the MR ratio of 3.6% is obtained in the film of 30vol.%Fe at 15kOe at room temperature. Magnetization curves are well approximated by two Langevin functions and MR curves are represented by sum of the squares of Langevin functions. Namely, they are described by two components, of large (L-component) and small (S-component) grains. The MR of L-component decreases at low temperature and that of S-component increases with decreasing temperature. Hall resistivity ρ_H increases with decreasing Fe composition and extraordinary Hall coefficient R_s is proportional to ρ^<0.6>. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Fe-SiO_2 granular films / tunneling magnetoresistance / extraordinary Hall effect / Langevin function |
| Paper # | MR96-87 |
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| Conference Information | |
| Committee | MR |
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| Conference Date | 1997/1/23(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
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| Paper Information | |
| Registration To | Magnetic Recording (MR) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Spin-Dependent Tunneling and Hall Effect in Fe-SiO_2 Granular Films |
| Sub Title (in English) | |
| Keyword(1) | Fe-SiO_2 granular films |
| Keyword(2) | tunneling magnetoresistance |
| Keyword(3) | extraordinary Hall effect |
| Keyword(4) | Langevin function |
| 1st Author's Name | T. Okada |
| 1st Author's Affiliation | Hiroshima University() |
| 2nd Author's Name | T Umemoto |
| 2nd Author's Affiliation | Hiroshima University |
| 3rd Author's Name | M. Nawate |
| 3rd Author's Affiliation | Shimane University |
| 4th Author's Name | S. Honda |
| 4th Author's Affiliation | Hiroshima University |
| Date | 1997/1/23 |
| Paper # | MR96-87 |
| Volume (vol) | vol.96 |
| Number (no) | 485 |
| Page | pp.pp.- |
| #Pages | 8 |
| Date of Issue | |