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Paper Abstract and Keywords
Presentation 2013-07-12 13:50
Surface Flatness Control of Ferromagnetic Alloy Thin Films with L10 Ordered Structure
Akira Itabashi, Mitsuru Ohtake (Chuo Univ.), Fumiyoshi Kirino (Tokyo University of the Arts), Masaaki Futamoto (Chuo Univ.) MR2013-7
Abstract (in Japanese) (See Japanese page) 
(in English) FePd, FePt, and CoPt alloy epitaxial thin films with L10 structure are prepared on (001) single-crystal substrates of MgO, SrTiO3, and LaAlO3 by using an ultra-high vacuum radio-frequency magnetron sputtering system. The c-axis destitution and the film surface flatness are controlled. FePd films formed on MgO and SrTiO3 substrates consist of L10(001) single-crystal with the c-axis normal to the film surface, whereas an FePd film formed on LaAlO3 substrate and FePt and CoPt films formed on all the substrates involve two types of L10(100) crystal with the c-axis lying in the film plane in addition to L10(001) crystal. The c-axis distribution is influenced by the combination of film and substrate materials. Higher order degrees are observed in the film material order of CoPt < FePt < FePd and the substrate material order of LaAlO3 < SrTiO3 < MgO. A two-step preparation method consisting of low-temperature deposition at 200 °C followed by high-temperature annealing at 600 °C is proposed in order to form L10 ordered films with flat surfaces. When FePd films are prepared on MgO substrates by the two-step method, the c-axis is also controlled to the perpendicular to the substrate surface. The order degrees of films prepared by two-step method are almost similar to those of films formed by one-step method consisting of deposition at 600 °C (S = 0.6&#8211;0.7). The films of thicknesses ranging from 5 to 40 nm prepared by the two-step method have very flat surfaces with the arithmetical mean roughness value lower than 0.2 nm, whereas rough surfaces involving facets are formed for the films prepared by the one-step method. The two-step method is effective for preparation of flat ultra-thin films with L10 structure.
Keyword (in Japanese) (See Japanese page) 
(in English) FePd / FePt / CoPt / thin film / L10 structure / surface flatness / epitaxial growth / single-crystal substrate  
Reference Info. IEICE Tech. Rep., vol. 113, July 2013.
Paper #  
Date of Issue 2013-07-05 (MR) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF MR2013-7

Conference Information
Committee MRIS ITE-MMS  
Conference Date 2013-07-12 - 2013-07-12 
Place (in Japanese) (See Japanese page) 
Place (in English) Chuo Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Solid State Memory, Media, etc. 
Paper Information
Registration To MRIS 
Conference Code 2013-07-MR-MMS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Surface Flatness Control of Ferromagnetic Alloy Thin Films with L10 Ordered Structure 
Sub Title (in English)  
Keyword(1) FePd  
Keyword(2) FePt  
Keyword(3) CoPt  
Keyword(4) thin film  
Keyword(5) L10 structure  
Keyword(6) surface flatness  
Keyword(7) epitaxial growth  
Keyword(8) single-crystal substrate  
1st Author's Name Akira Itabashi  
1st Author's Affiliation Chuo University (Chuo Univ.)
2nd Author's Name Mitsuru Ohtake  
2nd Author's Affiliation Chuo University (Chuo Univ.)
3rd Author's Name Fumiyoshi Kirino  
3rd Author's Affiliation Tokyo University of the Arts (Tokyo University of the Arts)
4th Author's Name Masaaki Futamoto  
4th Author's Affiliation Chuo University (Chuo Univ.)
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Speaker Author-1 
Date Time 2013-07-12 13:50:00 
Presentation Time 25 minutes 
Registration for MRIS 
Paper # MR2013-7 
Volume (vol) vol.113 
Number (no) no.127 
Page pp.7-12 
#Pages 6 
Date of Issue 2013-07-05 (MR) 

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