Wide-scale evolution of magnetization distribution in ultrathin films

Abstract

We show, combining simulations and analytical study, the evolution of magnetization distributions in ultrathin film with in-plane fields (H ʈ ) and changes of magnetic anisotropy characterized by the quality factor, Q. Reconstruction of the distributions and their new types near Q or H ʈ -induced reorientation phase transitions, from a domain structure ͑DS͒ with perpendicular magnetization into a state with in-plane magnetization, are reported. Sinusoidal-like DS exist for H ʈ larger than the anisotropy field and for QϽ1. A minimal 8l ex DS period is predicted (l ex is the exchange length͒.

Modification of Magnetic Properties of Pt/Co/Pt Films by Ga+ Ion Irradiation: Focused versus Uniform Irradiation

“…Domains size (B) decreases down to few hundreds nanometers (A) while approaching the border between out-of-plane and in-plane magnetization state (SRT region). Submicrometer domain sizes near SRT were theoretically predicted in [40][41][42]. This domains behavior is consistent with the fluence gradient present across the transitional zone between the two regions that involves intermediate fluences belonging to branch 1.…”

Theory of magnetic domains in uniaxial thin films

“…For a detailed analysis of the weak stripe phase a micromagnetic numerical analysis is indispensable (see [7,8,9,10] and many other works). However, simple analytical models are helpful for getting a quick, albeit crude understanding of the stripe phases.…”

New spin configurations in nano‐sized magnets near reorientation phase transition

“…Domain size giant changes were observed approaching the RPT in infinite ultrathin films [5]. Domain-like magnetization distributions and their field-and/or thickness-driven evolutions were recently studied in such films experimentally, analytically, and by simulations [5][6][7][8]. Nanomagnet squeezing results in the appearance of new type of magnetization states which represent the subject of the present study.…”