relation: https://eprints.uet.vnu.edu.vn/eprints/id/eprint/3398/
title: Minor hysteresis patterns with a rounded/sharpened reversing behavior in ferromagnetic multilayer
creator: Quach, Duy Truong
creator: Pham, Duc Thang
creator: Ngo, Duc The
creator: Phan, The Long
creator: Park, Seung-Young
creator: Lee, Sang-Hyuk
creator: Kim, Dong-Hyun
subject: Engineering Physics
subject: Scopus-indexed journals
subject: ISI-indexed journals
description: Hysteresis of ferromagnetic system exhibits a fundamental stimulus-response behavior, thereby  casting all the important macromagnetic system parameters such as coercivity, nucleation feld,  saturation magnetization, and hysteresis loss. Recently, increasing attention has been paid to  exploration of relatively less understood minor loop behavior, since faster operation of magnetic  devices is inevitably accompanied by minor hysteresis behavior from cycling among unsaturated  ferromagnetic states. Here, we report our microscopic investigation of unusual minor hysteresis loop  behavior, represented by rounded or sharpened response of minor hysteresis loop of (CoFeB/Pd)4  multilayer flm. It is observed that rounded and sharpened response in the minor hysteresis response  could be manifested under proper conditions. The minor loop behavior has been systematically  investigated by direct microscopic magnetic domain observation using magneto-optical Kerr  microscopy. The rounded response of magnetization at the reversing external feld along the minor  hysteresis curve, so far neglected or considered as one of ‘unusual’ behaviors, has been found to be  elaborately controllable by tuning the reversing feld strength and the feld sweep rate for multilayers  with low repeat numbers. Variable roundedness of the minor hysteresis loop is understandable based on  the analysis of magnetic domain dynamics such as domain nucleation and the domain wall velocity.
publisher: Nature Publishing Group
date: 2018-03
type: Article
type: PeerReviewed
format: application/pdf
language: en
identifier: https://eprints.uet.vnu.edu.vn/eprints/id/eprint/3398/1/s41598-018-22810-y.pdf
identifier:   Quach, Duy Truong and Pham, Duc Thang and Ngo, Duc The and Phan, The Long and Park, Seung-Young and Lee, Sang-Hyuk and Kim, Dong-Hyun  (2018) Minor hysteresis patterns with a rounded/sharpened reversing behavior in ferromagnetic multilayer.  Scientific Reports, 8 .   p. 4461.  ISSN 2045-2322