TY - JOUR
T1 - Interisland spacing and angle effects on magnetic reversal in permalloy arrays
AU - Koo, H.
AU - Krafft, C.
AU - Gomez, R. D.
N1 - Funding Information:
Manuscript received February 14, 2002; revised May 22, 2002. This work was supported in part by NSF CAREER Award ECS-9984797 and performed in part at the Cornell Nanofabrication Facility (a member of the National Nanofabri-cation Users Network), which is supported by the National Science Foundation under Grant ECS-9731293, Cornell University, and industrial affiliates.
Copyright:
Copyright 2004 Elsevier Science B.V., Amsterdam. All rights reserved.
PY - 2002/9
Y1 - 2002/9
N2 - The switching characteristics of submicron permalloy elements were systematically studied as a function of interisland spacing. The result was an increase of the switching field with reduction in spacing, with a maximum value for near zero spacing. However, in overlapped segments, all elements switched simultaneously at lower fields than the maximum at zero spacing. The switching field depends on the number of connected segments as described by the Jacobs-Bean model, whereas the switching of the separated islands is governed mainly by the field emanating from the nearest-neighbor magnetic poles. The reversal behavior of the branched contiguous array was also studied. The angle between the branch axis and the easy axis played a critical role in establishing the switching field. The reversal field of the branched segment reached a minimum at 45° and a maximum at 90°. A coherent rotation model, which includes the effect of the array geometry, appears to explain the trends.
AB - The switching characteristics of submicron permalloy elements were systematically studied as a function of interisland spacing. The result was an increase of the switching field with reduction in spacing, with a maximum value for near zero spacing. However, in overlapped segments, all elements switched simultaneously at lower fields than the maximum at zero spacing. The switching field depends on the number of connected segments as described by the Jacobs-Bean model, whereas the switching of the separated islands is governed mainly by the field emanating from the nearest-neighbor magnetic poles. The reversal behavior of the branched contiguous array was also studied. The angle between the branch axis and the easy axis played a critical role in establishing the switching field. The reversal field of the branched segment reached a minimum at 45° and a maximum at 90°. A coherent rotation model, which includes the effect of the array geometry, appears to explain the trends.
KW - Angle
KW - Array
KW - Coherent rotation
KW - Interisland spacing
KW - Permalloy
KW - Switching field
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U2 - 10.1109/TMAG.2002.801947
DO - 10.1109/TMAG.2002.801947
M3 - Conference article
AN - SCOPUS:0036762061
VL - 38
SP - 2559
EP - 2561
JO - IEEE Transactions on Magnetics
JF - IEEE Transactions on Magnetics
SN - 0018-9464
IS - 5 I
T2 - 2002 International Magnetics Conference (Intermag 2002)
Y2 - 28 April 2002 through 2 May 2002
ER -