Magnetoresistance of granular ferromagnets
| Autor: | André Sulpice, A. Milner, M. Karpovsky, A. Gladkikh, Alexander Gerber, Berry Groisman |
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| Rok vydání: | 1997 |
| Předmět: |
Condensed Matter::Materials Science
Matrix (mathematics) Materials science Magnetoresistance Ferromagnetism Condensed matter physics Magnetic components Astrophysics::Solar and Stellar Astrophysics Condensed Matter::Strongly Correlated Electrons Percolation threshold Giant magnetoresistance Intergranular corrosion Condensed Matter::Mesoscopic Systems and Quantum Hall Effect |
| Zdroj: | Physical Review B. 55:6446-6452 |
| ISSN: | 1095-3795 0163-1829 |
| DOI: | 10.1103/physrevb.55.6446 |
| Popis: | We report a comparative study of the magnetic and magnetoresistance phenomena in two types of granular ferromagnets: ferromagnet-normal-metal mixtures Ni-Ag, Co-Ag, and ferromagnet-insulator mixtures Ni-${\mathrm{SiO}}_{2}$ , Co-${\mathrm{SiO}}_{2}$ . Anisotropic magnetoresistance and giant magnetoresistance (GMR) are identified in both types of systems above and below the magnetic component percolation threshold respectively. The GMR effect in granular ferromagnets is shown to be essentially independent of the nature and resistance of the nonmagnetic intergranular matrix. |
| Databáze: | OpenAIRE |
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