Academic Journal
Quantum tunneling in magnetic systems of various sizes (invited)
| العنوان: | Quantum tunneling in magnetic systems of various sizes (invited) |
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| المؤلفون: | Barbara, B., Sampaio, L, C, Wegrowe, J. E., Ratnam, B, A, Marchand, A., Paulsen, C., Novak, M., Tholence, J. L., L, Uehara, M., Fruchart, D. |
| المساهمون: | Laboratoire Louis Néel (LLN), Centre National de la Recherche Scientifique (CNRS), Laboratoire des Solides Irradiés - Irradiated Solids Laboratory (LSI), Institut Rayonnement Matière de Saclay (DRF) (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X), Institut Polytechnique de Paris (IP Paris)-Institut Polytechnique de Paris (IP Paris)-Centre National de la Recherche Scientifique (CNRS), Centre de Recherches sur les Très Basses Températures (CRTBT), Université Joseph Fourier - Grenoble 1 (UJF)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS), Centre d'examen de santé, Institut inter-Régional pour la SAnté (IRSA), Laboratoire de Cristallographie |
| المصدر: | ISSN: 0021-8979. |
| بيانات النشر: | CCSD American Institute of Physics |
| سنة النشر: | 1993 |
| المجموعة: | École Polytechnique, Université Paris-Saclay: HAL |
| مصطلحات موضوعية: | [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] |
| الوصف: | International audience ; hfagnetic relaxation experiments constit.ute a unique method of determining the nature of fluctuations in dissipative magnetic systems. At high temperatures these fluctuations are thermal and strongly temperature dependent. At low temperatures, where quantum fluctuations dominate, magnetic relaxation becomes independent of temperature. Such behavior has been observed in many systems. In this review we emphasize the study of low temperature relaxation in ferromagnetic nanoparticles, layers, and multilayers (including " domain wall junctions "), and large single crystals. The results of magnetic relaxation experiments are shown to agree with theoretical predictions of quantum tunneling of the magnetization. When dissipation becomes important, in large and complex systems, a time dependent WKB exponent needs to be introduced. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| DOI: | 10.1063/1.352508 |
| الاتاحة: | https://hal.science/hal-01659995 https://hal.science/hal-01659995v1/document https://hal.science/hal-01659995v1/file/barbara1993-Quant-Tunnel-Systems-various-siezs.pdf https://doi.org/10.1063/1.352508 |
| Rights: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.A90B455E |
| قاعدة البيانات: | BASE |
| DOI: | 10.1063/1.352508 |
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