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- Title
Quantum tunneling in ferromagnetic nanoparticles interacting with a spin thermostat: effective Hamiltonian.
- Authors
Tupitsyn, I. S.
- Abstract
An effective Hamiltonian is obtained which describes quantum tunneling in ferromagnetic nanoparticles in the presence of a hyperfine interaction of the electron spins in the nanoparticle with the microscopic spins in the environment (such as paramagnetic impurities or nuclear spins). A criterion of transition between ferromagnetic and antiferromagnetic tunneling regimes is found. The validity of the equations obtained is checked by the method of exact diagonalization. © 1998 American Institute of Physics.
- Subjects
QUANTUM tunneling; FERROMAGNETIC materials; NANOPARTICLES
- Publication
JETP Letters, 1998, Vol 67, Issue 1, p28
- ISSN
0021-3640
- Publication type
Article
- DOI
10.1134/1.567723