TY - JOUR
T1 - Dynamical response of nanoscale magnet in the environment with noise
AU - Nishino, Masamichi
AU - Saito, Keiji
AU - Miyashita, Seiji
N1 - Funding Information:
The present work was supported by Grant-in-Aid for Scientific Research from Ministry of Education, Culture, Sports, Science and Technology of Japan. M.N. is also supported by the Research Fellowships of the Japan Society for the Promotion of Science for Young Scientists.
PY - 2002/6
Y1 - 2002/6
N2 - We have investigated the effect of noise on the energy gap of the quantum resonant tunneling. By the use of the Landau-Zener-Stückelberg formula, we estimate the tunneling gap of the two level system with S = 1/2 and also that of the lowest two levels in the realistic model with S = 10. As observed in the corresponding experiments, the estimated gap has no velocity dependence in fast sweeping field in both systems. We show that a correction for the estimated energy gap is necessary for the two level system with S = 1/2, while the effect of noise is negligible for the system with S = 10. We discuss the difference between both systems and also interpretation of the experimental data.
AB - We have investigated the effect of noise on the energy gap of the quantum resonant tunneling. By the use of the Landau-Zener-Stückelberg formula, we estimate the tunneling gap of the two level system with S = 1/2 and also that of the lowest two levels in the realistic model with S = 10. As observed in the corresponding experiments, the estimated gap has no velocity dependence in fast sweeping field in both systems. We show that a correction for the estimated energy gap is necessary for the two level system with S = 1/2, while the effect of noise is negligible for the system with S = 10. We discuss the difference between both systems and also interpretation of the experimental data.
KW - A. Magnetic materials
KW - D. Magnetic properties
KW - D. Magnetic structure
UR - http://www.scopus.com/inward/record.url?scp=0036602586&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0036602586&partnerID=8YFLogxK
U2 - 10.1016/S0022-3697(02)00088-4
DO - 10.1016/S0022-3697(02)00088-4
M3 - Conference article
AN - SCOPUS:0036602586
VL - 63
SP - 1523
EP - 1526
JO - Journal of Physics and Chemistry of Solids
JF - Journal of Physics and Chemistry of Solids
SN - 0022-3697
IS - 6-8
T2 - Proceedings of the 8th ISSP International Symposium
Y2 - 2 November 2001 through 5 November 2001
ER -