Metastable Sm(Fe,Cu)<sub>5</sub>ordered alloy films formed on Cu(111) underlayers

Yanagawa, Takato; Ohtake, Mitsuru; Kirino, Fumiyoshi; Futamoto, Masaaki

doi:10.1051/epjconf/20134006007

Cited by 9 publications

(9 citation statements)

References 16 publications

(22 reference statements)

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“…For application to PMR media, the Ku should be larger than the magneto-static energy (2πMs 2 ), thus a relation, Ku > 2πMs 2 , must be satisfied. The materials above the Ku = 2πMs 2 line shown in [130][131][132][133][134][135][136][137] or a Ru(0001) underlayer 138) .…”

Section: High Ku Magnetic Materialsmentioning

confidence: 99%

“…Amorphous phases tend to be mixed with RT5-ordered crystals when the composition shifts from the optimum ranges which depend delicately on the R-T material combination 130,134) . Substrate temperature higher than 500 °C is necessary for the preparation of RT5-type epitaxial thin films on Cu(111) and Ru (0001) underlayers.…”

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%

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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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Section: High Ku Magnetic Materialsmentioning

confidence: 99%

Section: High Ku Magnetic Materialsmentioning

confidence: 99%

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Development of Media Nanostructure for Perpendicular Magnetic Recording

Futamoto

Ohtake

2017

J. Magn. Soc. Jpn.

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“…Epitaxial RCo5 (R = Pr, Nd, etc.) ordered alloy films have been prepared 11,12) , whereas there are few reports on the formation of SmT5 (T = Fe, Ni) ordered films [13][14][15] . Ni (1455 °C) has a lower melting point than Co (1495 °C) or Fe (1536 °C).…”

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 RCo 5 (R = Pr, Nd, etc.) ordered epitaxial films have been prepared [9,10], whereas there are few reports on the formation of SmT 5 (T = Fe, Ni) ordered films [11][12][13]. Ni (1455 °C) has a lower melting point than Co (1495 °C) and Fe (1538 °C).…”

Section: Introductionmentioning

confidence: 99%

Ordered phase formation in Sm-Ni thin film deposited on Cr(100) single-crystal underlayer

Hotta

Yamada

Yanagawa

et al. 2014

EPJ Web of Conferences

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Abstract. Sm 17 Ni 83 (at. %) alloy thin films are prepared on Cr(100) underlayers hetero-epitaxially grown on MgO(100) single-crystal substrates by employing an ultra-high vacuum molecular beam epitaxy system. The effect of substrate temperature on the ordered phase formation is investigated. The films deposited below 300 °C consist of amorphous phase, whereas formation of SmNi 5 ordered phase is recognized for the films deposited above 400 °C. The SmNi 5 films with ordered phase consist of 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. With increasing the temperature from 400 to 500 °C, the long-range order degree increases from 0.65 to 0.80. The ordered film formed at 500 °C shows an in-plane magnetic anisotropy reflecting the magnetocrystalline anisotropy of SmNi 5 crystal.

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Metastable Sm(Fe,Cu)₅ordered alloy films formed on Cu(111) underlayers

Cited by 9 publications

References 16 publications

Development of Media Nanostructure for Perpendicular Magnetic Recording

Development of Media Nanostructure for Perpendicular Magnetic Recording

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

Ordered phase formation in Sm-Ni thin film deposited on Cr(100) single-crystal underlayer

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Metastable Sm(Fe,Cu)5ordered alloy films formed on Cu(111) underlayers

Cited by 9 publications

References 16 publications

Development of Media Nanostructure for Perpendicular Magnetic Recording

Development of Media Nanostructure for Perpendicular Magnetic Recording

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

Ordered phase formation in Sm-Ni thin film deposited on Cr(100) single-crystal underlayer

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Metastable Sm(Fe,Cu)₅ordered alloy films formed on Cu(111) underlayers