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Determination of Dzyaloshinskii-Mori...

Pokhrel, Ashok,

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Determination of Dzyaloshinskii-Moriya Interaction and Higher Order Magnetic Anisotropy in Ultrathin Films and Magnetic Multilayers /

Record Type:	Electronic resources : Monograph/item
Title/Author:	Determination of Dzyaloshinskii-Moriya Interaction and Higher Order Magnetic Anisotropy in Ultrathin Films and Magnetic Multilayers // Ashok Pokhrel.
Author:	Pokhrel, Ashok,
Description:	1 electronic resource (73 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 83-12, Section: B.
Contained By:	Dissertations Abstracts International83-12B.
Subject:	Physics. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29060892
ISBN:	9798834042020

Determination of Dzyaloshinskii-Moriya Interaction and Higher Order Magnetic Anisotropy in Ultrathin Films and Magnetic Multilayers /
Pokhrel, Ashok,

Determination of Dzyaloshinskii-Moriya Interaction and Higher Order Magnetic Anisotropy in Ultrathin Films and Magnetic Multilayers /Ashok Pokhrel. - 1 electronic resource (73 pages)

Source: Dissertations Abstracts International, Volume: 83-12, Section: B.

The exotic properties of magnetic materials provide multiple avenues for research as well as the possibility for energy-efficient, faster and cheaper technologies. Especially, earlier few decades had been crucial for the advancement of memory devices in-terms of size, speed, price and availability. Material science scientific community has been dedicated for developing next generation memory devices. The presence of a strong perpendicular magnetic anisotropy (PMA) and Dzyaloshinskii-Moriya interaction (DMI) in magnetic materials serve as building blocks for the formation of skyrmions which are promising candidates for next generation memory devices. This dissertation discusses the fundamentals of Dzyaloshinskii-Moriya interaction (DMI) which is responsible for the formation of skyrmions in magnetic multilayers. Especially this dissertation discusses the First Principle calculation technique and micromagnetic simulations to estimate the magnitude and sign of DMI and estimation of higher-order perpendicular anisotropy in ferromagnetic multilayers.In the first study presented in this dissertation, the basis of DMI, spin spirals and penalty energy parameters are discussed and the magnitude and strength of DMI vector in Pt/Co multilayers is estimated and related with proximity effect. In the second study presented, the origin of higher-order contribution of perpendicular magnetic anisotropy (PMA) are studied in ferromagnetic bilayers using micromagnetic simulations. These simulations showed that spatial inhomogeneities of the first-order perpendicular anisotropy may be the origin of higher-order anisotropies in magnetic multilayers.

English

ISBN: 9798834042020Subjects--Topical Terms:

516296
Physics.
Subjects--Index Terms:

Anisotropy

Determination of Dzyaloshinskii-Moriya Interaction and Higher Order Magnetic Anisotropy in Ultrathin Films and Magnetic Multilayers /
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245 1 0 $a Determination of Dzyaloshinskii-Moriya Interaction and Higher Order Magnetic Anisotropy in Ultrathin Films and Magnetic Multilayers / $c Ashok Pokhrel.
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520 $a The exotic properties of magnetic materials provide multiple avenues for research as well as the possibility for energy-efficient, faster and cheaper technologies. Especially, earlier few decades had been crucial for the advancement of memory devices in-terms of size, speed, price and availability. Material science scientific community has been dedicated for developing next generation memory devices. The presence of a strong perpendicular magnetic anisotropy (PMA) and Dzyaloshinskii-Moriya interaction (DMI) in magnetic materials serve as building blocks for the formation of skyrmions which are promising candidates for next generation memory devices. This dissertation discusses the fundamentals of Dzyaloshinskii-Moriya interaction (DMI) which is responsible for the formation of skyrmions in magnetic multilayers. Especially this dissertation discusses the First Principle calculation technique and micromagnetic simulations to estimate the magnitude and sign of DMI and estimation of higher-order perpendicular anisotropy in ferromagnetic multilayers.In the first study presented in this dissertation, the basis of DMI, spin spirals and penalty energy parameters are discussed and the magnitude and strength of DMI vector in Pt/Co multilayers is estimated and related with proximity effect. In the second study presented, the origin of higher-order contribution of perpendicular magnetic anisotropy (PMA) are studied in ferromagnetic bilayers using micromagnetic simulations. These simulations showed that spatial inhomogeneities of the first-order perpendicular anisotropy may be the origin of higher-order anisotropies in magnetic multilayers.
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653 $a Thin film
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