Quantum physics of ferromagnetic metal nanoparticles in an external magnetic field
(2002) Proceedings of 7th International Conference on Nanometer-Scale Science and Technology and 21st European Conference on Surface Science (NANO-7/ECOSS-21)- Abstract
- We use a microscopic Slater-Koster tight-binding model to study the magnetic properties of ferromagnetic metal nanoparticles containing up to 260 atoms. We compute the total energy as a function of the magnetization direction and the ensuing magnetic anisotropy. In an external magnetic field, the ground-state energy as a function of the magnetization orientation is characterized by minima separated by energy barriers, in agreement with the results obtained using simple classical micromagnetic energy functional expressions with easy orientation directions. At a critical value of the external magnetic field, one of the local minima disappears, causing a re-orientation of the magnetization direction. Because of the magnetization reversal, the... (More)
- We use a microscopic Slater-Koster tight-binding model to study the magnetic properties of ferromagnetic metal nanoparticles containing up to 260 atoms. We compute the total energy as a function of the magnetization direction and the ensuing magnetic anisotropy. In an external magnetic field, the ground-state energy as a function of the magnetization orientation is characterized by minima separated by energy barriers, in agreement with the results obtained using simple classical micromagnetic energy functional expressions with easy orientation directions. At a critical value of the external magnetic field, one of the local minima disappears, causing a re-orientation of the magnetization direction. Because of the magnetization reversal, the magnetic field dependence of the quasi-particle states displays an abrupt change at the switching field, similar to the field dependence of the discrete resonances observed in tunneling experiments on magnetic nanoparticles (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/611142
- author
- Cehovin, Aleksander LU ; Canali, Carlo LU and MacDonald, A.H.
- organization
- publishing date
- 2002
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- ferromagnetic metal nanoparticles, quantum physics, external magnetic field, microscopic Slater-Koster tight binding model, magnetic properties, magnetization direction, magnetic anisotropy, ground state energy, magnetization orientation, simple classical micromagnetic energy functional expressions, critical value, easy orientation directions, switching field, tunneling experiments, discrete resonances, magnetization reversal, magnetic field dependence, quasiparticle states
- host publication
- 7th International Conference on Nanometer-Scale Science and Technology and 21st European Conference on Surface Science
- pages
- 2 pages
- publisher
- Lund University
- conference name
- Proceedings of 7th International Conference on Nanometer-Scale Science and Technology and 21st European Conference on Surface Science (NANO-7/ECOSS-21)
- conference location
- Malmö, Sweden
- conference dates
- 2002-06-24 - 2002-06-28
- language
- English
- LU publication?
- yes
- id
- 276cc606-17dd-4a57-aa4c-ce12bae85b01 (old id 611142)
- date added to LUP
- 2016-04-04 11:16:04
- date last changed
- 2018-11-21 21:03:44
@inproceedings{276cc606-17dd-4a57-aa4c-ce12bae85b01,
abstract = {{We use a microscopic Slater-Koster tight-binding model to study the magnetic properties of ferromagnetic metal nanoparticles containing up to 260 atoms. We compute the total energy as a function of the magnetization direction and the ensuing magnetic anisotropy. In an external magnetic field, the ground-state energy as a function of the magnetization orientation is characterized by minima separated by energy barriers, in agreement with the results obtained using simple classical micromagnetic energy functional expressions with easy orientation directions. At a critical value of the external magnetic field, one of the local minima disappears, causing a re-orientation of the magnetization direction. Because of the magnetization reversal, the magnetic field dependence of the quasi-particle states displays an abrupt change at the switching field, similar to the field dependence of the discrete resonances observed in tunneling experiments on magnetic nanoparticles}},
author = {{Cehovin, Aleksander and Canali, Carlo and MacDonald, A.H.}},
booktitle = {{7th International Conference on Nanometer-Scale Science and Technology and 21st European Conference on Surface Science}},
keywords = {{ferromagnetic metal nanoparticles; quantum physics; external magnetic field; microscopic Slater-Koster tight binding model; magnetic properties; magnetization direction; magnetic anisotropy; ground state energy; magnetization orientation; simple classical micromagnetic energy functional expressions; critical value; easy orientation directions; switching field; tunneling experiments; discrete resonances; magnetization reversal; magnetic field dependence; quasiparticle states}},
language = {{eng}},
publisher = {{Lund University}},
title = {{Quantum physics of ferromagnetic metal nanoparticles in an external magnetic field}},
year = {{2002}},
}