Journal ArticleDOI
Mesoscopic quantum tunneling in small ferromagnetic particles
TLDR
In this paper, the magnetic relaxation of a set of ferromagnetic small particles of Tb 0.5 Ce0.5 Fe 2 of mean diameter 150 A has been measured at low temperatures (down to 50 mK) and with a field up to 6 kOe.About:
This article is published in Physics Letters A.The article was published on 1991-12-30. It has received 34 citations till now. The article focuses on the topics: Magnetic moment & Coercivity.read more
Citations
More filters
Journal ArticleDOI
Theory of the spin bath
TL;DR: The central spin model as mentioned in this paper is a spin bath analogue of the spin-boson oscillator model, and describes the tunnelling dynamics of nanoscopic and mesoscopic magnets and superconductors.
Journal ArticleDOI
Macroscopic Quantum Effects in Nanometer-Scale Magnets
TL;DR: Measurements on magnetic horse spleen ferritin proteins with the predictions of quantum tunneling theory are discussed and shown.
Journal ArticleDOI
Thermally activated magnetization reversal in elongated ferromagnetic particles.
TL;DR: Elongated ferromagnetic single-domain particles are believed to exhibit a high stability of their remanent magnetization but here it is shown that for elongated particles thermal fluctuations lower the coercivity much more drastically than predicted by current theories.
Journal ArticleDOI
Fine-particle magnetic oxides
TL;DR: The response of fine-particle magnetic oxides to applied magnetic fields is of primary importance in several areas of applied physics, such as magnetic separation, magnetic fluid devices, and magnetic recording.
Journal ArticleDOI
Quantum tunneling in magnetic systems of various sizes (invited)
Bernard Barbara,Luiz C. Sampaio,J. E. Wegrowe,B. A. Ratnam,A. Marchand,C. Paulsen,Miguel A. Novak,J.L. Tholence,M. Uehara,D. Fruchart +9 more
TL;DR: In this article, the results of magnetic relaxation experiments are shown to agree with theoretical predictions of quantum tunneling of the magnetization, and the authors emphasize the study of low temperature relaxation in ferromagnetic nanoparticles, layers, and multilayers (including domain wall junctions).
References
More filters
Journal ArticleDOI
Quantum tunnelling in a dissipative system
Journal ArticleDOI
Quantum tunneling of magnetization in small ferromagnetic particles.
TL;DR: Estimated tunneling rates of the magnetization in a single-domain particle through an energy barrier between easy directions prove to be large enough for observation of the effect with the use of existing experimental techniques.
Journal ArticleDOI
Macroscopic Quantum Tunneling in 1-μm Nb Josephson Junctions
Richard F. Voss,Richard A. Webb +1 more
TL;DR: The probability distributions for switching out of the superconducting state of low-cur-rent-density 1-nb Josephson junctions with capacitance 0.1 pF have been measured as a function of temperature $T$ down to 3 mK as mentioned in this paper.
Journal ArticleDOI
Quantum Mechanics of a Macroscopic Variable: The Phase Difference of a Josephson Junction
TL;DR: Low temperature measurements of the escape rate for junctions that are either nearly undamped or moderately damped agree very closely with predictions for macroscopic quantum tunneling, with no adjustable parameters.
Journal ArticleDOI
Quantum tunnelling of magnetisation
TL;DR: In this paper, the magnetic properties of a single particle of magnetic material in the shape of a cylinder only 150 A in diameter and 300 A in length were analyzed using an integrated DC SQUID microsusceptometer.