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Title: Many-spin effects and tunneling properties of magnetic molecules

Abstract

Spin tunneling in molecular magnets has attracted much attention, however theoretical considerations of this phenomenon up to now have not taken into account the many-spin nature of molecular magnets. We present, to our knowledge, the first successful attempt of a realistic calculation of tunneling splittings for Mn{sub 12} molecules, thus achieving a quantitatively accurate many-spin description of a real molecular magnet in the energy interval ranging from about 100 K down to 10{sup -12} K. Comparison with the results of the standard single-spin model shows that many-spin effects affect the tunneling splittings considerably. The values of ground state splitting given by single-spin and many-spin models differ from each other by a factor of 5. (c) 2000 American Institute of Physics.

Authors:
 [1];  [1];  [1];  [1]
  1. Ames Laboratory, Iowa State University, Ames, Iowa 50011 (United States)
Publication Date:
OSTI Identifier:
20216267
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 87; Journal Issue: 9; Other Information: PBD: 1 May 2000; Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 74 ATOMIC AND MOLECULAR PHYSICS; MOLECULES; MANGANESE; TUNNEL EFFECT; MAGNETS; SPIN; TEMPERATURE RANGE; THEORETICAL DATA

Citation Formats

Al-Saqer, M., Dobrovitski, V. V., Harmon, B. N., and Katsnelson, M. I. Many-spin effects and tunneling properties of magnetic molecules. United States: N. p., 2000. Web. doi:10.1063/1.372675.
Al-Saqer, M., Dobrovitski, V. V., Harmon, B. N., & Katsnelson, M. I. Many-spin effects and tunneling properties of magnetic molecules. United States. doi:10.1063/1.372675.
Al-Saqer, M., Dobrovitski, V. V., Harmon, B. N., and Katsnelson, M. I. Mon . "Many-spin effects and tunneling properties of magnetic molecules". United States. doi:10.1063/1.372675.
@article{osti_20216267,
title = {Many-spin effects and tunneling properties of magnetic molecules},
author = {Al-Saqer, M. and Dobrovitski, V. V. and Harmon, B. N. and Katsnelson, M. I.},
abstractNote = {Spin tunneling in molecular magnets has attracted much attention, however theoretical considerations of this phenomenon up to now have not taken into account the many-spin nature of molecular magnets. We present, to our knowledge, the first successful attempt of a realistic calculation of tunneling splittings for Mn{sub 12} molecules, thus achieving a quantitatively accurate many-spin description of a real molecular magnet in the energy interval ranging from about 100 K down to 10{sup -12} K. Comparison with the results of the standard single-spin model shows that many-spin effects affect the tunneling splittings considerably. The values of ground state splitting given by single-spin and many-spin models differ from each other by a factor of 5. (c) 2000 American Institute of Physics.},
doi = {10.1063/1.372675},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 9,
volume = 87,
place = {United States},
year = {2000},
month = {5}
}