DFT calculations of strain and interface effects on electronic structures and magnetic properties of L1<inf>0</inf>-FePt/Ag heterojunction of GMR applications

© 2018 Author(s). In this work, density functional theory (DFT) was employed to investigate the effect of strain and interface on electronic structures and magnetic properties of L1 0 -FePt/Ag heterojunction. Two possible interface structures of L1 0 -FePt(001)/Ag(001), that is, interface between Fe...

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Main Authors: Sittichain Pramchu, Atchara Punya Jaroenjittichai, Yongyut Laosiritaworn
Format: Journal
Published: 2018
Online Access:https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85043786368&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/48493
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Institution: Chiang Mai University
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spelling th-cmuir.6653943832-484932018-04-25T10:13:04Z DFT calculations of strain and interface effects on electronic structures and magnetic properties of L1<inf>0</inf>-FePt/Ag heterojunction of GMR applications Sittichain Pramchu Atchara Punya Jaroenjittichai Yongyut Laosiritaworn © 2018 Author(s). In this work, density functional theory (DFT) was employed to investigate the effect of strain and interface on electronic structures and magnetic properties of L1 0 -FePt/Ag heterojunction. Two possible interface structures of L1 0 -FePt(001)/Ag(001), that is, interface between Fe and Ag layers (Fe/Ag) and between Pt and Ag layers (Pt/Ag), were inspected. It was found that Pt/Ag interface is more stable than Fe/Ag interface due to its lower formation energy. Further, under the lattice mismatch induced tensile strain, the enhancement of magnetism for both Fe/Ag and Pt/Ag interface structures has been found to have progressed, though the magnetic moments of "interfacial" Fe and Pt atoms have been found to have decreased. To explain this further, the local density of states (LDOS) analysis suggests that interaction between Fe (Pt) and Ag near Fe/Ag (Pt/Ag) interface leads to spin symmetry breaking of the Ag atom and hence induces magnetism magnitude. In contrast, the magnetic moments of interfacial Fe and Pt atoms reduce because of the increase in the electronic states near the Fermi level of the minority-spin electrons. In addition, the significant enhancements of the LDOS near the Fermi levels of the minority-spin electrons signify the boosting of the transport properties of the minority-spin electrons and hence the spin-dependent electron transport at this ferromagnet/metal interface. From this work, it is expected that this clarification of the interfacial magnetism may inspire new innovation on how to improve spin-dependent electron transport for enhancing the giant magnetoresistance (GMR) ratio of potential GMR-based spintronic devices. 2018-04-25T10:13:04Z 2018-04-25T10:13:04Z 2018-03-01 Journal 21583226 2-s2.0-85043786368 10.1063/1.5020193 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85043786368&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/48493
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
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description © 2018 Author(s). In this work, density functional theory (DFT) was employed to investigate the effect of strain and interface on electronic structures and magnetic properties of L1 0 -FePt/Ag heterojunction. Two possible interface structures of L1 0 -FePt(001)/Ag(001), that is, interface between Fe and Ag layers (Fe/Ag) and between Pt and Ag layers (Pt/Ag), were inspected. It was found that Pt/Ag interface is more stable than Fe/Ag interface due to its lower formation energy. Further, under the lattice mismatch induced tensile strain, the enhancement of magnetism for both Fe/Ag and Pt/Ag interface structures has been found to have progressed, though the magnetic moments of "interfacial" Fe and Pt atoms have been found to have decreased. To explain this further, the local density of states (LDOS) analysis suggests that interaction between Fe (Pt) and Ag near Fe/Ag (Pt/Ag) interface leads to spin symmetry breaking of the Ag atom and hence induces magnetism magnitude. In contrast, the magnetic moments of interfacial Fe and Pt atoms reduce because of the increase in the electronic states near the Fermi level of the minority-spin electrons. In addition, the significant enhancements of the LDOS near the Fermi levels of the minority-spin electrons signify the boosting of the transport properties of the minority-spin electrons and hence the spin-dependent electron transport at this ferromagnet/metal interface. From this work, it is expected that this clarification of the interfacial magnetism may inspire new innovation on how to improve spin-dependent electron transport for enhancing the giant magnetoresistance (GMR) ratio of potential GMR-based spintronic devices.
format Journal
author Sittichain Pramchu
Atchara Punya Jaroenjittichai
Yongyut Laosiritaworn
spellingShingle Sittichain Pramchu
Atchara Punya Jaroenjittichai
Yongyut Laosiritaworn
DFT calculations of strain and interface effects on electronic structures and magnetic properties of L1<inf>0</inf>-FePt/Ag heterojunction of GMR applications
author_facet Sittichain Pramchu
Atchara Punya Jaroenjittichai
Yongyut Laosiritaworn
author_sort Sittichain Pramchu
title DFT calculations of strain and interface effects on electronic structures and magnetic properties of L1<inf>0</inf>-FePt/Ag heterojunction of GMR applications
title_short DFT calculations of strain and interface effects on electronic structures and magnetic properties of L1<inf>0</inf>-FePt/Ag heterojunction of GMR applications
title_full DFT calculations of strain and interface effects on electronic structures and magnetic properties of L1<inf>0</inf>-FePt/Ag heterojunction of GMR applications
title_fullStr DFT calculations of strain and interface effects on electronic structures and magnetic properties of L1<inf>0</inf>-FePt/Ag heterojunction of GMR applications
title_full_unstemmed DFT calculations of strain and interface effects on electronic structures and magnetic properties of L1<inf>0</inf>-FePt/Ag heterojunction of GMR applications
title_sort dft calculations of strain and interface effects on electronic structures and magnetic properties of l1<inf>0</inf>-fept/ag heterojunction of gmr applications
publishDate 2018
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85043786368&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/48493
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