Macroscopic Quantum Tunneling of Magnetization of Single Ferrimagnetic Nanoparticles of Barium Ferrite
| Autor: | Bernard Barbara, Wolfgang Wernsdorfer, O. Kubo, E. Bonet Orozco, Klaus Hasselbach, Alain Benoit, Dominique Mailly, H. Nakano |
|---|---|
| Přispěvatelé: | Laboratoire Louis Néel (LLN), Centre National de la Recherche Scientifique (CNRS), Centre de Recherches sur les Très Basses Températures (CRTBT), Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique de Grenoble (INPG)-Université Joseph Fourier - Grenoble 1 (UJF), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire de photonique et de nanostructures (LPN), Barbara, Bernard |
| Jazyk: | angličtina |
| Rok vydání: | 1997 |
| Předmět: |
Materials science
Field (physics) Condensed matter physics Magnetization reversal General Physics and Astronomy Nanoparticle 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences [PHYS.COND.CM-MSQHE] Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall] Magnetization chemistry.chemical_compound chemistry Ferrimagnetism 0103 physical sciences Thermal [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat] 010306 general physics 0210 nano-technology Barium ferrite Quantum tunnelling [PHYS.COND] Physics [physics]/Condensed Matter [cond-mat] [PHYS.COND.CM-MSQHE]Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall] |
| Zdroj: | Physical Review Letters Physical Review Letters, American Physical Society, 1997, 79 (20), pp.4014 |
| ISSN: | 0031-9007 1079-7114 |
| Popis: | Presented are switching field measurements of individual ferrimagnetic and insulating BaFeCoTiO nanoparticles containing about ${10}^{5}{\ensuremath{\mu}}_{B}$ at very low temperatures (0.1--6 K). For temperatures higher than 0.4 K, the quantitative agreement with the N\'eel-Brown theory of thermal activated magnetization reversal allowed us to identify unambiguously the magnetization reversal of uniform rotation. Below 0.4 K, strong deviations from this model are evidenced which are quantitatively in agreement with the predictions of the theory of macroscopic quantum tunneling of magnetization in the low dissipation regime. |
| Databáze: | OpenAIRE |
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