Titlebook: Quantum Tunneling of Magnetization — QTM ’94; Leon Gunther,Bernard Barbara Book 1995 Springer Science+Business Media Dordrecht 1995 Experi

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指耕作

Quantum Tunneling of Magnetizationtemperature. The crossover temperature between the two regimes is governed by the magnetic anisotropy constant in ferromagnets, depends on the external magnetic field and is in qualitative agreement with theoretical suggestions on quantum tunneling of magnetization.

等級(jí)的上升

Acoustic and Magnetic Properties of Rare-Earth-Ion-Doped Glasses: Elastic and Magnetic Tunneling Staglasses magnetic tunneling states (MTS), if the dilute ions are magnetic and have Kramers degeneracy [5,6]. The MTS, attributable to the magnetic rare-earth ions, can be explained with the theory of tunneling of large spins having strong anisotropy energy [7–10].

deviate

Monte Carlo Simulations on Reversal Magnetization of Small Clustersh static and dynamical calculations, spins at the cluster edge play a fundamental role. Present results agree with recent experiments on small anisotropic single domain particles, questioning the uniform rotation model of the magnetization.

矛盾

Macroscopic Quantum Effects in Magnetic Systems: An Overviewonditions, be represented as occupying not one or other of these states but rather a .: for example, an atom driven by an electromagnetic field may be in a linear combination of its ground (s) state and an excited (p) state, and its properties are then different from what they would be in either sta

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Synchronism

Quantum Spin-Tunneling:A Path Integral Approachassical ground state is removed due to tunneling. The tunnel splitting Δ.. of the ground state is calculated by use of a path integral formalism. It is shown that coherent spin state path integrals do not yield a reasonable result. However a “bosonlzation” of the spin system yields excellent results

Seizure

Macroscopic Quantum Tunneling in Ferromagnets and Antiferromagnetsferromagnetic particles. Expressions for the rates of quantum tunneling and thermal activation of the magnetization and the Néel vector are given for low temperatures, near the cross-over temperature and high temperatures. Quantum and thermally activated nucleations in bulk solids and two-dimensiona

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