Stability of information in Bloch line memories

Abstract

The wall atate stability of magnetic bubbles in fertimagnetic aagrown garnet film8 suitable for Bloch line "mory applications is inveatigated in order to predict the atability of vertical Bloch line p i t a . In the experiment (1,O) and ( 0 , 2 ) bubble8 are subjected to fast biaa pulues (15 ns width) and to an in-plane field Hip. It ia found that the winding line pair preaent in a ( 0 , 2 ) bubble can be annihilated, resulting in a (1,O) final atate. On thm other hand a (1,O) bubble c8a be switched into a ( 0 , 2 ) bubble w i t h different erperiment8l conditions. These non-conservative switching proceasea are in moat caaea irreversible. However the awitching probability never reaches 100%. An intarpretation o f the annihilation mechanism ia given and the conaequencea for devices are discussed.

Physical properties of elongated inorganic nanoparticles

“…The magnetic field value at which the maximum ν is observed is known as the Walker field (H W ). Several authors have observed experimentally this discontinuity and some of them have studied the morphological, geometrical and physical parameters underlying the DW dynamics in both regimes, and the possible ways to avoid the Walker breakdown phenomenon [485][486][487][488].…”

10.1007/s11451-008-2001-4

“…Experimental data were taken from [98,121,134,[162][163][164][165][166] and were the most reliable, because the measurements reported in those papers were made using either dynamic bubble collapse or expanding bubbles and stripe domains using highspeed photography; furthermore, the required film characteristics were also reported in those papers. The data obtained by the bubble translation method were not used, because such measurements were performed in low fields H and, perhaps, did not correspond to the saturation region.…”