Abstract
We have studied the magnetization switching behaviour of ultra-thin films when we apply synchronous longitudinal and transverse pulse fields with duration shorter than relaxation time. The film was rectangular Permalloy with a dimension of 800 × 300 × 2 nm. In the case of a pulse duration of 100 ps, the switching map showed the c-shaped switching characteristics rather than the typical quasi-static asteroid. We found that the c-shaped switching characteristics are associated with the abnormal switching behaviour. The abnormal switching area was also found for a pulse duration of 300 ps and even in the precessional switching region for a pulse duration of 500 ps. Our results show that the transient non-uniform demagnetization developed by the crossing pulses is responsible for such abnormal switching behaviour, and this is supported by simulation for the elliptical film whose demagnetization field distribution is relatively uniform.
| Original language | English |
|---|---|
| Pages (from-to) | 3979-3982 |
| Number of pages | 4 |
| Journal | Physica Status Solidi (A) Applications and Materials Science |
| Volume | 204 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - 2007 Dec 1 |
Fingerprint
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Surfaces and Interfaces
- Surfaces, Coatings and Films
- Electrical and Electronic Engineering
- Materials Chemistry
Cite this
}
Magnetic switching instability of ultrathin magnetic films under crossing pulse fields with duration shorter than relaxation time. / Han, Yoonsung; Lee, Sangho; Kim, Sunghoon; Lee, Jinwon; Kim, Ahram; Hong, Jongill.
In: Physica Status Solidi (A) Applications and Materials Science, Vol. 204, No. 12, 01.12.2007, p. 3979-3982.Research output: Contribution to journal › Article
TY - JOUR
T1 - Magnetic switching instability of ultrathin magnetic films under crossing pulse fields with duration shorter than relaxation time
AU - Han, Yoonsung
AU - Lee, Sangho
AU - Kim, Sunghoon
AU - Lee, Jinwon
AU - Kim, Ahram
AU - Hong, Jongill
PY - 2007/12/1
Y1 - 2007/12/1
N2 - We have studied the magnetization switching behaviour of ultra-thin films when we apply synchronous longitudinal and transverse pulse fields with duration shorter than relaxation time. The film was rectangular Permalloy with a dimension of 800 × 300 × 2 nm. In the case of a pulse duration of 100 ps, the switching map showed the c-shaped switching characteristics rather than the typical quasi-static asteroid. We found that the c-shaped switching characteristics are associated with the abnormal switching behaviour. The abnormal switching area was also found for a pulse duration of 300 ps and even in the precessional switching region for a pulse duration of 500 ps. Our results show that the transient non-uniform demagnetization developed by the crossing pulses is responsible for such abnormal switching behaviour, and this is supported by simulation for the elliptical film whose demagnetization field distribution is relatively uniform.
AB - We have studied the magnetization switching behaviour of ultra-thin films when we apply synchronous longitudinal and transverse pulse fields with duration shorter than relaxation time. The film was rectangular Permalloy with a dimension of 800 × 300 × 2 nm. In the case of a pulse duration of 100 ps, the switching map showed the c-shaped switching characteristics rather than the typical quasi-static asteroid. We found that the c-shaped switching characteristics are associated with the abnormal switching behaviour. The abnormal switching area was also found for a pulse duration of 300 ps and even in the precessional switching region for a pulse duration of 500 ps. Our results show that the transient non-uniform demagnetization developed by the crossing pulses is responsible for such abnormal switching behaviour, and this is supported by simulation for the elliptical film whose demagnetization field distribution is relatively uniform.
UR - http://www.scopus.com/inward/record.url?scp=38049127211&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=38049127211&partnerID=8YFLogxK
U2 - 10.1002/pssa.200777144
DO - 10.1002/pssa.200777144
M3 - Article
AN - SCOPUS:38049127211
VL - 204
SP - 3979
EP - 3982
JO - Physica Status Solidi (A) Applications and Materials Science
JF - Physica Status Solidi (A) Applications and Materials Science
SN - 1862-6300
IS - 12
ER -