Suppressing FePt order-disorder structural phase transition temperature by Ag doping: First principles investigation for enhancing magnetic recording density

© 2016 Taylor & Francis Group, LLC. In this work, we used density functional theory to study the structures, formation energy and order–disorder structural transition temperature (T o ) of L1 0 FePt with Ag additive. The results show that an Ag atom substituting for a Fe site is more energeti...

Full description

Saved in:
Bibliographic Details
Main Authors: Pramchu S., Punya A., Laosiritaworn Y.
Format: Journal
Published: 2017
Online Access:https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84982315566&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/41429
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Chiang Mai University
id th-cmuir.6653943832-41429
record_format dspace
spelling th-cmuir.6653943832-414292017-09-28T04:21:18Z Suppressing FePt order-disorder structural phase transition temperature by Ag doping: First principles investigation for enhancing magnetic recording density Pramchu S. Punya A. Laosiritaworn Y. © 2016 Taylor & Francis Group, LLC. In this work, we used density functional theory to study the structures, formation energy and order–disorder structural transition temperature (T o ) of L1 0 FePt with Ag additive. The results show that an Ag atom substituting for a Fe site is more energetically preferable than that of substituting for a Pt, thus Ag atom should replace Fe site. We found that T o is significantly suppressed by Ag impurity because of the increasing in configurational entropy, whereas the magnetism tends to decrease due to the absence of some Fe atom in doping processes. The decrease in T o could open the opportunity to prepare FePt with lower temperature and small grain size for the high density magnetic recording media application. 2017-09-28T04:21:18Z 2017-09-28T04:21:18Z 2016-10-12 Journal 10584587 2-s2.0-84982315566 10.1080/10584587.2016.1205427 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84982315566&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/41429
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
description © 2016 Taylor & Francis Group, LLC. In this work, we used density functional theory to study the structures, formation energy and order–disorder structural transition temperature (T o ) of L1 0 FePt with Ag additive. The results show that an Ag atom substituting for a Fe site is more energetically preferable than that of substituting for a Pt, thus Ag atom should replace Fe site. We found that T o is significantly suppressed by Ag impurity because of the increasing in configurational entropy, whereas the magnetism tends to decrease due to the absence of some Fe atom in doping processes. The decrease in T o could open the opportunity to prepare FePt with lower temperature and small grain size for the high density magnetic recording media application.
format Journal
author Pramchu S.
Punya A.
Laosiritaworn Y.
spellingShingle Pramchu S.
Punya A.
Laosiritaworn Y.
Suppressing FePt order-disorder structural phase transition temperature by Ag doping: First principles investigation for enhancing magnetic recording density
author_facet Pramchu S.
Punya A.
Laosiritaworn Y.
author_sort Pramchu S.
title Suppressing FePt order-disorder structural phase transition temperature by Ag doping: First principles investigation for enhancing magnetic recording density
title_short Suppressing FePt order-disorder structural phase transition temperature by Ag doping: First principles investigation for enhancing magnetic recording density
title_full Suppressing FePt order-disorder structural phase transition temperature by Ag doping: First principles investigation for enhancing magnetic recording density
title_fullStr Suppressing FePt order-disorder structural phase transition temperature by Ag doping: First principles investigation for enhancing magnetic recording density
title_full_unstemmed Suppressing FePt order-disorder structural phase transition temperature by Ag doping: First principles investigation for enhancing magnetic recording density
title_sort suppressing fept order-disorder structural phase transition temperature by ag doping: first principles investigation for enhancing magnetic recording density
publishDate 2017
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84982315566&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/41429
_version_ 1681422000432611328