Title :
Precessional magnetization reversal in microscopic spin valve cells
Author :
Schumacher, H.W. ; Chappert, C. ; Crozat, P. ; Sousa, R.C. ; Freitas, P.P. ; Miltat, J. ; Ferré, J.
Author_Institution :
Inst. d´´Electron. Fondamentale, Univ. de Paris-Sud, Orsay, France
fDate :
9/1/2002 12:00:00 AM
Abstract :
We demonstrate stable and reversible precessional switching of the magnetization in microscopic spin valve cells. Magnetization reversal is achieved by applying sub-ns-hard axis magnetic field pulses under compensation of the easy axis offset field. Multiple application of a given hard axis field pulse leads to a stable and reversible switching back and forth of the cell´s magnetization. Applications of this precessional switching process in ultra fast low power magnetic random access memories can be foreseen.
Keywords :
giant magnetoresistance; magnetic film stores; magnetic hysteresis; magnetic switching; magnetisation reversal; random-access storage; spin valves; Ta-NiFe-MnIr-CoFe-Cu-CoFe-NiFe-Ta; easy axis offset field compensation; magnetization dynamics; microscopic spin valve cells; precessional magnetization reversal; stable reversible precessional switching; static easy axis GMR hysteresis loop; sub-ns-hard axis magnetic field pulses; ultra fast low power magnetic random access memories; Magnetic field measurement; Magnetic fields; Magnetic films; Magnetic force microscopy; Magnetic switching; Magnetization reversal; Magnetostatics; Pulse measurements; Spin valves; Testing;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2002.801903
