Dynamical response of nanoscale magnet in the environment with noise

Masamichi Nishino, Keiji Saitou, Seiji Miyashita

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish
Pages (from-to)1523-1526
Number of pages4
JournalJournal of Physics and Chemistry of Solids
Volume63
Issue number6-8
DOIs
Publication statusPublished - 2002 Jun
Externally publishedYes

Fingerprint

Magnets
Energy gap
magnets
Resonant tunneling
resonant tunneling
Experiments
estimates

Keywords

  • A. Magnetic materials
  • D. Magnetic properties
  • D. Magnetic structure

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Dynamical response of nanoscale magnet in the environment with noise. / Nishino, Masamichi; Saitou, Keiji; Miyashita, Seiji.

In: Journal of Physics and Chemistry of Solids, Vol. 63, No. 6-8, 06.2002, p. 1523-1526.

Research output: Contribution to journalArticle

Nishino, Masamichi ; Saitou, Keiji ; Miyashita, Seiji. / Dynamical response of nanoscale magnet in the environment with noise. In: Journal of Physics and Chemistry of Solids. 2002 ; Vol. 63, No. 6-8. pp. 1523-1526.
@article{589478bb82f44acf89975058480e304e,
title = "Dynamical response of nanoscale magnet in the environment with noise",
abstract = "We have investigated the effect of noise on the energy gap of the quantum resonant tunneling. By the use of the Landau-Zener-St{\"u}ckelberg 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.",
keywords = "A. Magnetic materials, D. Magnetic properties, D. Magnetic structure",
author = "Masamichi Nishino and Keiji Saitou and Seiji Miyashita",
year = "2002",
month = "6",
doi = "10.1016/S0022-3697(02)00088-4",
language = "English",
volume = "63",
pages = "1523--1526",
journal = "Journal of Physics and Chemistry of Solids",
issn = "0022-3697",
publisher = "Elsevier Limited",
number = "6-8",

}

TY - JOUR

T1 - Dynamical response of nanoscale magnet in the environment with noise

AU - Nishino, Masamichi

AU - Saitou, Keiji

AU - Miyashita, Seiji

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 - 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

ER -