Phase diagram of three contrasting magnetization reversal phases in uniaxial ferromagnetic thin films

Abstract

Thermally activated magnetization reversal behavior of uniaxial ferromagnetic thin films in the microsecond to second time regime

Field dependence of the activation volumes in Co/Pd multilayered films

“…As described in Ref. 17, the magnetic energy E of a cell with the angle of magnetization direction from the +z axis is expressed by…”

“…The major origin of the different reversal behavior between the two samples is believed to be due to an increase in the dipolar energy, induced by an increase of M s with the increase in t Co . 17 Interestingly, the magnetization reversal behavior in each sample varies as the strength of the applied field increases. To be precise, as the applied field increases, the reversal behavior in the ͑2 Å Co/11 Å Pd͒ 10 sample changes from a wall-motion dominant to a nucleation dominant process, whereas in the ͑4 Å Co/11 Å Pd͒ 10 sample, it changes from a nucleation dominant to a wall-motion dominant process, as clearly seen in Fig.…”

Spin reorientation transition of ferromagnetic nanowires with perpendicular magnetic anisotropy

“…Perpendicularly magnetized films have three distinct domain structures: large ͑or single͒, stripe, and scattered-dot domains. [9][10][11] The large-domain phase, which shows the wall-motion-dominated reversal process, might be suitable for domain-wall-based nanowire applications. In contrast, the narrow stripe or dot domain phase gains stability in randomly written domain bits.…”

Width-Dependent Transition of Magnetic Domain Configuration in Nanostructured CoFe/Pt Multilayered Nanowires

“…PMA films exhibit three distinct domain configurations: single, dendrite, and scattered-dot domains [4][5][6][7][8], which are formed by domainwall motion, dendrite growth, and nucleation processes, respectively. The formation of such distinct domain configurations is determined by the counterbalance between the magnetostatic and domain wall energies [9,10]. However, recently, it has been proposed that the geometry of magnetic nanostructures also modifies the domain configurations, resulting in a transition from the dendrite domain to the single domain with a decrease in the nanowire width [3,11].…”