Presentation 2018-03-08
[Invited Talk] Tailoring of Crystal Orientation and Surface Flatness for L10-ordered FePt-based Epitaxial Magnetic Thin Film
Masaaki Futamoto, Mitsuru Ohtake,
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Abstract(in Japanese) (See Japanese page)
Abstract(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)
Keyword(in English) L10-ordered phase / A1-disordered phase / FePt thin film / epitaxial growth / c-axis / surface roughness
Paper # EMD2017-78,MR2017-49,SCE2017-49,EID2017-51,ED2017-123,CPM2017-143,SDM2017-123,ICD2017-128,OME2017-72
Date of Issue 2018-03-01 (EMD, MR, SCE, EID, ED, CPM, SDM, ICD, OME)

Conference Information
Committee CPM / ED / EID / SDM / ICD / MR / SCE / OME / EMD
Conference Date 2018/3/8(1days)
Place (in Japanese) (See Japanese page)
Place (in English)
Topics (in Japanese) (See Japanese page)
Topics (in English)
Chair Fumihiko Hirose(Yamagata Univ.) / Kunio Tsuda(Toshiba) / Yuko Kominami(Shizuoka Univ.) / Tatsuya Kunikiyo(Renesas) / Hideto Hidaka(Renesas) / Yoshihiro Okamoto(Ehime Univ.) / Hiroaki Myoren(Saitama Univ.) / Tatsuo Mori(Aichi Inst. of Tech.) / Yoshiteru Abe(NTT)
Vice Chair Mayumi Takeyama(Kitami Inst. of Tech.) / Michihiko Suhara(TMU) / Mutsumi Kimura(Ryukoku Univ.) / Takahiro Shinada(Tohoku Univ.) / Makoto Nagata(Kobe Univ.) / / / Yutaka Majima(Tokyo Inst. of Tech.)
Secretary Mayumi Takeyama(Nihon Univ.) / Michihiko Suhara(Toyohashi Univ. of Tech.) / Mutsumi Kimura(New JRC) / Takahiro Shinada(NICT) / Makoto Nagata(NTT) / (Tokyo Inst. of Tech.) / (Tohoku Univ.) / Yutaka Majima(Renesas) / (Univ. of Tokyo)
Assistant Yuichi Akage(NTT) / Toshiyuki Oishi(Saga Univ.) / Tatsuya Iwata(TUT) / Rumiko Yamaguchi(Akita Univ.) / Hiroyuki Nitta(Japan Display) / Mitsuru Nakata(NHK) / Ryosuke Nonaka(Toshiba) / Takeshi Okuno(Huawei) / Tomokazu Shiga(Univ. of Electro-Comm.) / Hiroya Ikeda(Shizuoka Univ.) / Tetsu Morooka(TOSHIBA MEMORY) / Masanori Natsui(Tohoku Univ.) / Masatoshi Tsuge(Socionext) / Hiroyuki Ito(Tokyo Inst. of Tech.) / Pham Konkuha(Univ. of Electro-Comm.) / Tazumi Nagasawa(Toshiba) / Shuhei Yoshida(Kinki Univ.) / Hiroyuki Akaike(Daido Univ.) / Hirotake Kajii(Osaka Univ.) / Toshihiko Kaji(Tokyo Univ. of Agriculture and Tech.) / Yoshiki Kayano(Univ. of Electro-Comm.)

Paper Information
Registration To Technical Committee on Component Parts and Materials / Technical Committee on Electron Devices / Technical Committee on Electronic Information Displays / Technical Committee on Silicon Device and Materials / Technical Committee on Integrated Circuits and Devices / Technical Committee on Magnetic Recording / Technical Committee on Superconductive Electronics / Technical Committee on Organic Molecular Electronics / Technical Committee on Electromechanical Devices
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) [Invited Talk] 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
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.)
Date 2018-03-08
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) EMD-492,MR-493,SCE-494,EID-495,ED-496,CPM-497,SDM-498,ICD-499,OME-500
Page pp.pp.31-36(EMD), pp.31-36(MR), pp.31-36(SCE), pp.31-36(EID), pp.31-36(ED), pp.31-36(CPM), pp.31-36(SDM), pp.31-36(ICD), pp.31-36(OME),
#Pages 6
Date of Issue 2018-03-01 (EMD, MR, SCE, EID, ED, CPM, SDM, ICD, OME)