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Presentation 2018-03-08 16:40
[Invited Talk] Tailoring of Crystal Orientation and Surface Flatness for L10-ordered FePt-based Epitaxial Magnetic Thin Film
Masaaki Futamoto, Mitsuru Ohtake (Chuo Univ.) EMD2017-78 MR2017-49 SCE2017-49 EID2017-51 ED2017-123 CPM2017-143 SDM2017-123 ICD2017-128 OME2017-72 Link to ES Tech. Rep. Archives: EMD2017-78 MR2017-49 SCE2017-49 EID2017-51 ED2017-123 CPM2017-143 SDM2017-123 ICD2017-128 OME2017-72
Abstract (in Japanese) (See Japanese page) 
(in English) Effects of film formation process condition on L10-ordered FePt film structure are investigated by high-resolution transmission electron microscopy (TEM) for FePt thin films prepared on (001) oriented single-crystal substrates. The film structures associated with phase transformation from disordered A1 to ordered L10 phase are studied in atomic scale. The TEM observation has shown that the crystal lattice of A1-FePt film on MgO(001) substrate is strained in the lateral direction to substrate surface, and by annealing, the film structure varies to L10-ordered phase consisting of L10(001) variant with the c-axis aligned perpendicular. FePt film in a sample of L10-FePt(2 nm)/VN(001) is consisting of L10-(001) variant, whereas FePt film in a L10-FePt(2-nm average thickness)/MgO(001) sample includes variants of L10(100),(010) with the c-axis lying in-plane in addition to L10(001) variant. The lattice mismatch with substrate material is decreased by introduction of misfit dislocation and by lattice bending in L10-FePt crystal. The variant structures are influenced by the lattice strain in A1-FePt film during the L10-crystal nucleation stage at high temperature annealing process. Based on the experimental results, a model to explain the phase transformation from A1 to L10 involving nucleation and growth of L10-crystal is proposed.
Keyword (in Japanese) (See Japanese page) 
(in English) L10-ordered phase / A1-disordered phase / FePt thin film / epitaxial growth / c-axis / surface roughness / /  
Reference Info. IEICE Tech. Rep., vol. 117, March 2018.
Paper #  
Date of Issue 2018-03-01 (EMD, MR, SCE, EID, ED, CPM, SDM, ICD, OME) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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Download PDF EMD2017-78 MR2017-49 SCE2017-49 EID2017-51 ED2017-123 CPM2017-143 SDM2017-123 ICD2017-128 OME2017-72 Link to ES Tech. Rep. Archives: EMD2017-78 MR2017-49 SCE2017-49 EID2017-51 ED2017-123 CPM2017-143 SDM2017-123 ICD2017-128 OME2017-72

Conference Information
Committee CPM ED EID SDM ICD MRIS QIT SCE 
Conference Date 2018-03-08 - 2018-03-08 
Place (in Japanese) (See Japanese page) 
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Paper Information
Registration To MRIS 
Conference Code 2018-03-CPM-ED-EID-SDM-ICD-MRIS-QIT-SCE-OME-EMD 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Tailoring of Crystal Orientation and Surface Flatness for L10-ordered FePt-based Epitaxial Magnetic Thin Film 
Sub Title (in English)  
Keyword(1) L10-ordered phase  
Keyword(2) A1-disordered phase  
Keyword(3) FePt thin film  
Keyword(4) epitaxial growth  
Keyword(5) c-axis  
Keyword(6) surface roughness  
Keyword(7)  
Keyword(8)  
1st Author's Name Masaaki Futamoto  
1st Author's Affiliation Chuo University (Chuo Univ.)
2nd Author's Name Mitsuru Ohtake  
2nd Author's Affiliation Chuo University (Chuo Univ.)
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Speaker Author-1 
Date Time 2018-03-08 16:40:00 
Presentation Time 50 minutes 
Registration for MRIS 
Paper # EMD2017-78, MR2017-49, SCE2017-49, EID2017-51, ED2017-123, CPM2017-143, SDM2017-123, ICD2017-128, OME2017-72 
Volume (vol) vol.117 
Number (no) no.492(EMD), no.493(MR), no.494(SCE), no.495(EID), no.496(ED), no.497(CPM), no.498(SDM), no.499(ICD), no.500(OME) 
Page pp.31-36 
#Pages
Date of Issue 2018-03-01 (EMD, MR, SCE, EID, ED, CPM, SDM, ICD, OME) 


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