Magnetic Properties of Electrodeposited Cobalt-Platinum (CoPt) and Cobalt-Platinum-Phosphide (CoPtP) Thin Films
CoPt and CoPtP thin films were synthesized using direct current (DC) aqueous electrodeposition from weak alkaline solutions. The basic plating solutions of binary CoPt thin films consisted of cobalt pyrophosphate [Co2P2O7] and chloroplatinic acid [H2PtCl6]. Various amounts of sodium hypophosphite [N...
Main Authors: | , |
---|---|
Format: | Article |
Language: | English |
Published: |
Frontiers Media S.A.
2021-09-01
|
Series: | Frontiers in Chemistry |
Subjects: | |
Online Access: | https://www.frontiersin.org/articles/10.3389/fchem.2021.733383/full |
id |
doaj-de265e7c47054ba8a48de89652b19625 |
---|---|
record_format |
Article |
spelling |
doaj-de265e7c47054ba8a48de89652b196252021-09-10T13:42:23ZengFrontiers Media S.A.Frontiers in Chemistry2296-26462021-09-01910.3389/fchem.2021.733383733383Magnetic Properties of Electrodeposited Cobalt-Platinum (CoPt) and Cobalt-Platinum-Phosphide (CoPtP) Thin FilmsD.-Y. Park0N. V. Myung1Department of Advanced Materials Engineering, Hanbat National University, Daejeon, South KoreaDepartment of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, IN, United StatesCoPt and CoPtP thin films were synthesized using direct current (DC) aqueous electrodeposition from weak alkaline solutions. The basic plating solutions of binary CoPt thin films consisted of cobalt pyrophosphate [Co2P2O7] and chloroplatinic acid [H2PtCl6]. Various amounts of sodium hypophosphite [NaH2PO2] was added to deposit ternary CoPtP thin films. The film composition was adjusted by varying the several electrodeposition parameters including electrolyte composition, solution pH, and current density and correlated to their microstructure and magnetic property (i.e. coercivity and squareness). For the binary CoPt thin films, the maximum coercivities [in-plane coercivity (Hc,//) = ∼1,600 Oe, and perpendicular coercivity (Hc,⊥) = ∼2,500 Oe] were obtained from electrolytes containing 0.01 M H2PtCl6 + 0.04 M Co2P2O7 at current density (CD) of 7.5 mA cm−2. In the case of ternary CoPtP electrodeposits, the maximum coercivities (Hc,// = ∼2,600 Oe, and Hc,⊥ = ∼3,800 Oe) were achieved from baths containing 0.015 M H2PtCl6, 0.07 M Co2P2O7, 0.8 M NaH2PO2 at CD of 7.5 mA cm−2 and solution pH 9. It was suggested that microstructure and magnetic properties are affected not only by the type of substrate but also by chemical compositions and electrodeposition conditions.https://www.frontiersin.org/articles/10.3389/fchem.2021.733383/fullcobalt-platinumcobalt-platinum-phosphideelectrodepositionmagnetic thin filmhard magnetic material |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
D.-Y. Park N. V. Myung |
spellingShingle |
D.-Y. Park N. V. Myung Magnetic Properties of Electrodeposited Cobalt-Platinum (CoPt) and Cobalt-Platinum-Phosphide (CoPtP) Thin Films Frontiers in Chemistry cobalt-platinum cobalt-platinum-phosphide electrodeposition magnetic thin film hard magnetic material |
author_facet |
D.-Y. Park N. V. Myung |
author_sort |
D.-Y. Park |
title |
Magnetic Properties of Electrodeposited Cobalt-Platinum (CoPt) and Cobalt-Platinum-Phosphide (CoPtP) Thin Films |
title_short |
Magnetic Properties of Electrodeposited Cobalt-Platinum (CoPt) and Cobalt-Platinum-Phosphide (CoPtP) Thin Films |
title_full |
Magnetic Properties of Electrodeposited Cobalt-Platinum (CoPt) and Cobalt-Platinum-Phosphide (CoPtP) Thin Films |
title_fullStr |
Magnetic Properties of Electrodeposited Cobalt-Platinum (CoPt) and Cobalt-Platinum-Phosphide (CoPtP) Thin Films |
title_full_unstemmed |
Magnetic Properties of Electrodeposited Cobalt-Platinum (CoPt) and Cobalt-Platinum-Phosphide (CoPtP) Thin Films |
title_sort |
magnetic properties of electrodeposited cobalt-platinum (copt) and cobalt-platinum-phosphide (coptp) thin films |
publisher |
Frontiers Media S.A. |
series |
Frontiers in Chemistry |
issn |
2296-2646 |
publishDate |
2021-09-01 |
description |
CoPt and CoPtP thin films were synthesized using direct current (DC) aqueous electrodeposition from weak alkaline solutions. The basic plating solutions of binary CoPt thin films consisted of cobalt pyrophosphate [Co2P2O7] and chloroplatinic acid [H2PtCl6]. Various amounts of sodium hypophosphite [NaH2PO2] was added to deposit ternary CoPtP thin films. The film composition was adjusted by varying the several electrodeposition parameters including electrolyte composition, solution pH, and current density and correlated to their microstructure and magnetic property (i.e. coercivity and squareness). For the binary CoPt thin films, the maximum coercivities [in-plane coercivity (Hc,//) = ∼1,600 Oe, and perpendicular coercivity (Hc,⊥) = ∼2,500 Oe] were obtained from electrolytes containing 0.01 M H2PtCl6 + 0.04 M Co2P2O7 at current density (CD) of 7.5 mA cm−2. In the case of ternary CoPtP electrodeposits, the maximum coercivities (Hc,// = ∼2,600 Oe, and Hc,⊥ = ∼3,800 Oe) were achieved from baths containing 0.015 M H2PtCl6, 0.07 M Co2P2O7, 0.8 M NaH2PO2 at CD of 7.5 mA cm−2 and solution pH 9. It was suggested that microstructure and magnetic properties are affected not only by the type of substrate but also by chemical compositions and electrodeposition conditions. |
topic |
cobalt-platinum cobalt-platinum-phosphide electrodeposition magnetic thin film hard magnetic material |
url |
https://www.frontiersin.org/articles/10.3389/fchem.2021.733383/full |
work_keys_str_mv |
AT dypark magneticpropertiesofelectrodepositedcobaltplatinumcoptandcobaltplatinumphosphidecoptpthinfilms AT nvmyung magneticpropertiesofelectrodepositedcobaltplatinumcoptandcobaltplatinumphosphidecoptpthinfilms |
_version_ |
1717757777145757696 |