TY - GEN
T1 - In-situ TEM studies of magnetization reversal processes in magnetic nanostructures
AU - Petford-Long, Amandu K.
AU - Bromwich, Thomas
AU - Kohn, Amit
AU - Jackson, Victoria
AU - Kasama, Takeshi
AU - Dunin-Borkowski, Rufal
AU - Ross, Caroline A.
PY - 2005
Y1 - 2005
N2 - One of the most widely studied types of magnetic nanostructure is that used in devices based on the giant magnetoresistance (GMR) or tunnel magnctoresistance (TMR) phenomena. In order to understand the bchavi.our of these materials it is important to be able to follow their magnetization reversal mechanism, and one of the techniques enabling micromagnetic studies at the sub-micron scale is transmission electron microscopy. Two techniques can be used: Lorentz transmission electron microscopy and off-axis electron holography, both of which allow the magnetic domain structure of a ferromagnetic material to be investigated dynamically in realtime with a resolution of a few nanometres. These techniques have been used in combination with in situ magnetizing experiments, to carry out qualitative and quantitative studies of magnetization reversal in a range of materials including spin-tunnel junctions, patterned thin film elements and magnetic antidot arrays. Quantitative analysis of the Lorentz TEM data has been carried out using the transport of intensity equation (TIE) approach.
AB - One of the most widely studied types of magnetic nanostructure is that used in devices based on the giant magnetoresistance (GMR) or tunnel magnctoresistance (TMR) phenomena. In order to understand the bchavi.our of these materials it is important to be able to follow their magnetization reversal mechanism, and one of the techniques enabling micromagnetic studies at the sub-micron scale is transmission electron microscopy. Two techniques can be used: Lorentz transmission electron microscopy and off-axis electron holography, both of which allow the magnetic domain structure of a ferromagnetic material to be investigated dynamically in realtime with a resolution of a few nanometres. These techniques have been used in combination with in situ magnetizing experiments, to carry out qualitative and quantitative studies of magnetization reversal in a range of materials including spin-tunnel junctions, patterned thin film elements and magnetic antidot arrays. Quantitative analysis of the Lorentz TEM data has been carried out using the transport of intensity equation (TIE) approach.
UR - http://www.scopus.com/inward/record.url?scp=34249935309&partnerID=8YFLogxK
U2 - 10.1557/proc-0907-mm04-01
DO - 10.1557/proc-0907-mm04-01
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AN - SCOPUS:34249935309
SN - 1558998624
SN - 9781558998629
T3 - Materials Research Society Symposium Proceedings
SP - 13
EP - 21
BT - In Situ Electron Microscopy of Materials
PB - Materials Research Society
T2 - 2005 MRS Fall Meeting
Y2 - 28 November 2005 through 2 December 2005
ER -