Abstract
Thermally assisted magnetization reversal of sub-100 nm dots with perpendicular anisotropy has been investigated using a micromagnetic Langevin model. The performance of the two different reversal modes of (i) a reduced barrier writing scheme and (ii) a Curie point writing scheme are compared. For the reduced barrier writing scheme, the switching field Hswt decreases with an increase in writing temperature but is still larger than that of the Curie point writing scheme. For the Curie point writing scheme, the required threshold field Hth, evaluated from 50 simulation results, saturates at a value, which is not simply related to the energy barrier height. The value of Hth increases with a decrease in cooling time owing to the dynamic aspects of the magnetic ordering process. Dependence of Hth on material parameters and dot sizes has been systematically studied.
| Original language | English |
|---|---|
| Pages (from-to) | 1325-1330 |
| Number of pages | 6 |
| Journal | Journal of Magnetism and Magnetic Materials |
| Volume | 321 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 2009 May |
| Externally published | Yes |
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Keywords
- Curie point writing
- Perpendicular anisotropy
- Reduced barrier writing
- Thermally assisted magnetization reversal
ASJC Scopus subject areas
- Condensed Matter Physics
- Electronic, Optical and Magnetic Materials
Cite this
Stochastic simulation of thermally assisted magnetization reversal in sub-100 nm dots with perpendicular anisotropy. / Purnama, Budi; Koga, Masashi; Nozaki, Yukio; Matsuyama, Kimihide.
In: Journal of Magnetism and Magnetic Materials, Vol. 321, No. 9, 05.2009, p. 1325-1330.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Stochastic simulation of thermally assisted magnetization reversal in sub-100 nm dots with perpendicular anisotropy
AU - Purnama, Budi
AU - Koga, Masashi
AU - Nozaki, Yukio
AU - Matsuyama, Kimihide
PY - 2009/5
Y1 - 2009/5
N2 - Thermally assisted magnetization reversal of sub-100 nm dots with perpendicular anisotropy has been investigated using a micromagnetic Langevin model. The performance of the two different reversal modes of (i) a reduced barrier writing scheme and (ii) a Curie point writing scheme are compared. For the reduced barrier writing scheme, the switching field Hswt decreases with an increase in writing temperature but is still larger than that of the Curie point writing scheme. For the Curie point writing scheme, the required threshold field Hth, evaluated from 50 simulation results, saturates at a value, which is not simply related to the energy barrier height. The value of Hth increases with a decrease in cooling time owing to the dynamic aspects of the magnetic ordering process. Dependence of Hth on material parameters and dot sizes has been systematically studied.
AB - Thermally assisted magnetization reversal of sub-100 nm dots with perpendicular anisotropy has been investigated using a micromagnetic Langevin model. The performance of the two different reversal modes of (i) a reduced barrier writing scheme and (ii) a Curie point writing scheme are compared. For the reduced barrier writing scheme, the switching field Hswt decreases with an increase in writing temperature but is still larger than that of the Curie point writing scheme. For the Curie point writing scheme, the required threshold field Hth, evaluated from 50 simulation results, saturates at a value, which is not simply related to the energy barrier height. The value of Hth increases with a decrease in cooling time owing to the dynamic aspects of the magnetic ordering process. Dependence of Hth on material parameters and dot sizes has been systematically studied.
KW - Curie point writing
KW - Perpendicular anisotropy
KW - Reduced barrier writing
KW - Thermally assisted magnetization reversal
UR - http://www.scopus.com/inward/record.url?scp=61849120263&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=61849120263&partnerID=8YFLogxK
U2 - 10.1016/j.jmmm.2008.12.003
DO - 10.1016/j.jmmm.2008.12.003
M3 - Article
VL - 321
SP - 1325
EP - 1330
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
SN - 0304-8853
IS - 9
ER -