Epitaxial growth of Sm(Co,Cu)5 thin film on Al2O3(0001) single-crystal substrate

Ohtake, Mitsuru; Nukaga, Yuri; Kirino, Fumiyoshi; Futamoto, Masaaki

doi:10.1016/j.jcrysgro.2009.01.137

Cited by 24 publications

(21 citation statements)

References 19 publications

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“…The increase of amorphous phase volume and the decrease of Fe (110) phase volume with increasing the layer thickness may be explained by considering the behavior of Cu atom diffusion from the underlayer into the Sm-Fe layer. Since the films are grown at elevated temperatures, the Sm-Fe films are expected to include Cu atoms diffused from the underlayer, and thus Sm(Fe,Cu) 5 ordered alloy layers are presumably formed, similar to the cases of Sm(Co,Cu) 5 ordered phase formation on Cu underlayers [3][4][5][6]. In the initial stage of Sm-Fe film growth on Cu underlayer, an Sm(Fe,Cu) 5 ordered phase is presumably formed through Cu atom diffusion and partial substitution of Fe sites in the SmFe 5 structure.…”

Section: Resultsmentioning

confidence: 98%

“…For magnetic recording media applications, high K u magnetic thin films with perpendicular magnetic anisotropy have been investigated. SmCo 5 polycrystalline [1][2][3][4] and SmCo 5 epitaxial [5][6][7] thin films with (0001) texture have been prepared by employing Cu(111) underlayers. Cu atom dissolution is known to stabilize the ordered phase formation through forming an alloy compound of Sm(Co,Cu) 5 [4,5,8].…”

Section: Introductionmentioning

confidence: 99%

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Formation of SmFe₅(0001) ordered alloy thin films on Cu(111) single-crystal underlayers

Yabuhara

Ohtake

Nukaga

et al. 2010

J. Phys.: Conf. Ser.

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Abstract. SmFe 5 (0001) single-crystal thin films are prepared by molecular beam epitaxy employing Cu(111) single-crystal underlayers on MgO(111) substrates. The Cu atoms diffuse into the Sm-Fe layer and substitute the Fe sites in SmFe 5 structure forming an alloy compound of Sm(Fe,Cu) 5 . The Sm(Fe,Cu) 5 film is more Cu enriched with increasing the substrate temperature. The Cu underlayer plays an important role in assisting the formation of the ordered phase.

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Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Formation of SmFe₅(0001) ordered alloy thin films on Cu(111) single-crystal underlayers

Yabuhara

Ohtake

Nukaga

et al. 2010

J. Phys.: Conf. Ser.

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“…Substrate temperature higher than 500 °C is necessary for the preparation of RT5-type epitaxial thin films on Cu(111) and Ru (0001) underlayers. Higher temperature, however, promotes diffusion of metallic Cu or Ru to the magnetic layer 131,139) , which generally lowers the Ku value. Further studies for forming a sharp interface while achieving a high order degree in the RT5 structure in very thin films of less than 10 nm in thickness are apparently necessary for the application to future perpendicular recording media.…”

Section: High Ku Magnetic Materialsmentioning

confidence: 99%

“…Concerning the preparation and the characterization of other-type ordered alloy films of RT5, L11-CoPt, Bh-CoPt, and DO19-Co3Pt, they are reported in the references [130][131][132][133][134][135][136][137][138][139][162][163][164][165][166][167][168][169][170][171][172] .…”

Section: D019 Co3ptmentioning

confidence: 99%

Development of Media Nanostructure for Perpendicular Magnetic Recording

Futamoto

Ohtake

2017

J. Magn. Soc. Jpn.

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The review covers the research and development of perpendicular media nanostructure focusing on the recording layer. The recording layer material includes the Co-alloys with hcp structure, the magnetic multilayers, and the alloys with ordered structures that have high magneto-crystalline anisotropies (Ku). The technologies of underlayer or interlayer for aligning the easy magnetization axis of magnetic crystal grain perpendicular to the film plane are briefly reviewed including the high Ku magnetic materials for future recording media.Observations of compositional and magnetization structures in sub-µm scale have played important roles in improving the recording layer. Typical data on these characteristics are explained in relation to the media structure improvements. Considering that high Ku magnetic materials will be employed in future recording media, basic experimental results related in controlling the easy magnetization axis and in keeping the surface flatness of L10-ordered magnetic materials are explained. Future possibilities for increasing the areal density beyond 1 Tb/in 2 by improving the magnetic material and the nanostructure of recording layer are also discussed.

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“…Reciprocal lattice map measurements like electron diffraction are useful for the phase identification. In our previous studies [8][9][10] , SmCo5…”

Section: Introductionmentioning

confidence: 99%

Preparation and Structure Characterization of Sm-Ni Alloy Epitaxial Thin Films

et al. 2015

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Sm x Ni 100-x (at. %) alloy thin films are prepared on Cr(100) underlayers hetero-epitaxially grown on MgO(100) single-crystal substrates at 500 °C by employing an ultra-high vacuum molecular beam epitaxy system with varying the Sm content from Ni-rich to Sm-rich region (x = 10-25 at. %) including the SmNi5 stoichiometry. The influence of film composition on ordered phase formation is studied by reflection high-energy electron diffraction and X-ray diffraction. Sm-Ni films with Sm compositions between 13 and 17 at. % consist of (112 _ 0) epitaxial crystals with RT5-type structure. The epitaxial films involve two types of (112 _ 0) variant whose c-axes are lying in the film plane and rotated around the film normal by 90° each other. As the Sm content departs from the compositional range, an amorphous phase tends to be included in the film in addition to SmNi5 ordered phase.

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Epitaxial growth of Sm(Co,Cu)5 thin film on Al2O3(0001) single-crystal substrate

Cited by 24 publications

References 19 publications

Formation of SmFe₅(0001) ordered alloy thin films on Cu(111) single-crystal underlayers

Formation of SmFe₅(0001) ordered alloy thin films on Cu(111) single-crystal underlayers

Development of Media Nanostructure for Perpendicular Magnetic Recording

Preparation and Structure Characterization of Sm-Ni Alloy Epitaxial Thin Films

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Epitaxial growth of Sm(Co,Cu)5 thin film on Al2O3(0001) single-crystal substrate

Cited by 24 publications

References 19 publications

Formation of SmFe5(0001) ordered alloy thin films on Cu(111) single-crystal underlayers

Formation of SmFe5(0001) ordered alloy thin films on Cu(111) single-crystal underlayers

Development of Media Nanostructure for Perpendicular Magnetic Recording

Preparation and Structure Characterization of Sm-Ni Alloy Epitaxial Thin Films

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Formation of SmFe₅(0001) ordered alloy thin films on Cu(111) single-crystal underlayers

Formation of SmFe₅(0001) ordered alloy thin films on Cu(111) single-crystal underlayers