4.3 Review

Grain density control in FePt granular films for heat-assisted magnetic recording media

Related references

Note: Only part of the references are listed.
Article Engineering, Electrical & Electronic

Fabrication of FePt/FePt-BN/FePt-SiOx Granular Film for HAMR Media on Corning Lotus NXT Glass Substrate

Bing Zhou et al.

Summary: In this study, FePt/FePt-BN/FePt-SiOx and FePt/FePt-C materials were fabricated for heat-assisted magnetic recording. The FePt/FePt-BN/FePt-SiOx media exhibited higher grain areal density and smaller grain-to-grain pitch distance, and could suppress the bimodal grain-size distribution. Both media showed good magnetic properties on Corning Lotus NXT glass substrates.

IEEE TRANSACTIONS ON MAGNETICS (2022)

Article Materials Science, Multidisciplinary

Transmission electron microscopy image based micromagnetic simulations for optimizing nanostructure of FePt-X heat-assisted magnetic recording media

A. Bolyachkin et al.

Summary: This study investigates the effects of structural defects on the magnetic properties of FePt-X nanogranular media using transmission electron microscopy (TEM) images and micromagnetic simulations. A new method for evaluating structural defects is developed and validated. The study directly links the nanostructure to the magnetic properties, enabling optimization of heat-assisted magnetic recording (HAMR) media and design of magnetic nanomaterials in general.

ACTA MATERIALIA (2022)

Article Materials Science, Coatings & Films

Magnetic properties and microstructure of FePt (Ag, C) films with MgTiOBN/CrRu underlayer

Jai-Lin Tsai et al.

Summary: The (001) textured L1(0) FePt film is a promising candidate material for future heat assisted magnetic recording technology. The material of the epitaxial intermediate layer for the FePt based granular film was chosen considering the surface energy and lattice mismatch between FePt and MgO-based materials. In this study, a (00L) textured FePt (Ag, C)/ MgTiOBN/CrRu film was prepared and the MgTiOBN intermediate layer was thoroughly explored. The FePt film showed high perpendicular magneto-crystalline anisotropy and out-of-plane coercivity, and exhibited lower in-plane magnetization and nonuniform trapezoidal island-like grains.

SURFACE & COATINGS TECHNOLOGY (2022)

Article Nanoscience & Nanotechnology

Understanding the growth of high-aspect-ratio grains in granular L10-FePt thin-film magnetic media

Chengchao Xu et al.

Summary: A systematic investigation was conducted to optimize the microstructure of L1(0)-FePt-SiOx granular thin films as recording media for heat-assisted magnetic recording. By controlling the deposition temperature and silicon oxide concentration, high-aspect-ratio FePt grains and well-formed SiOx grain boundaries were achieved.

APL MATERIALS (2022)

Article Nanoscience & Nanotechnology

Dependence of the Growth Mode in Epitaxial FePt Films on Surface Free Energy

Ippei Suzuki et al.

Summary: Epitaxial thin films of L1(0)-ordered FePt alloys are crucial in magnetic recording and spintronics applications due to their large perpendicular magnetic anisotropy. This study demonstrates the importance of controlling growth mode in achieving superior properties, and highlights the role of surface free energy in tuning the growth mode to enhance PMA and surface flatness in FePt films on MgO substrates.

ACS APPLIED MATERIALS & INTERFACES (2021)

Article Physics, Applied

The utilization of boron nitride (BN) for granular L10-FePt HAMR media fabrication

Bing Zhou et al.

Summary: This study introduces a new FePt-BN/FePt-SiOx dual-layer granular media with excellent magnetic properties and a higher areal density of FePt grains for heat-assisted magnetic recording. The transmission electron microscopy study reveals well-isolated FePt grains encircled by defined grain boundaries in the fully grown film, which also demonstrates comparable hysteresis characteristics to conventional FePt-C-SiOx granular media.

APPLIED PHYSICS LETTERS (2021)

Article Physics, Applied

Structure, magnetic and thermal properties of FePt-C-BN granular films for heat assisted magnetic recording

Shaohai Chen et al.

JOURNAL OF PHYSICS D-APPLIED PHYSICS (2020)

Article Materials Science, Multidisciplinary

Control of grain density in FePt-C granular thin films during initial growth

Ippei Suzuki et al.

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS (2020)

Article Engineering, Electrical & Electronic

Heat-Assisted Magnetic Recording's Extensibility to High Linear and Areal Density

Yukiko Kubota et al.

IEEE TRANSACTIONS ON MAGNETICS (2018)

Article Engineering, Electrical & Electronic

Columnar Structure in FePt-C Granular Media for Heat-Assisted Magnetic Recording

B. S. D. Ch. S. Varaprasad et al.

IEEE TRANSACTIONS ON MAGNETICS (2015)

Article Engineering, Electrical & Electronic

A HAMR Media Technology Roadmap to an Areal Density of 4 Tb/in(2)

Dieter Weller et al.

IEEE TRANSACTIONS ON MAGNETICS (2014)

Article Physics, Applied

Multiple oxide content media for columnar grain growth in L10 FePt thin films

Hoan Ho et al.

APPLIED PHYSICS LETTERS (2013)

Article Physics, Condensed Matter

Granular L10 FePt:X (X = Ag, B, C, SiOx, TaOx) thin films for heat assisted magnetic recording

Steven D. Granz et al.

EUROPEAN PHYSICAL JOURNAL B (2013)

Article Engineering, Electrical & Electronic

Microstructure and Magnetic Properties of FePt-MOx Granular Films

Taisuke Shiroyama et al.

IEEE TRANSACTIONS ON MAGNETICS (2013)

Article Physics, Applied

Lattice mismatch-induced evolution of microstructural properties in FePt films

K. F. Dong et al.

JOURNAL OF APPLIED PHYSICS (2013)

Article Materials Science, Multidisciplinary

Granular L10 FePt (001) thin films for Heat Assisted Magnetic Recording

Steven D. Granz et al.

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS (2012)

Article Materials Science, Multidisciplinary

L1(0)-ordered high coercivity (FePt)Ag-C granular thin films for perpendicular recording

Li Zhang et al.

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS (2010)

Article Physics, Applied

L10 FePt-C Nanogranular Perpendicular Anisotropy Films with Narrow Size Distribution

Alagarsamy Perumal et al.

APPLIED PHYSICS EXPRESS (2008)

Article Materials Science, Multidisciplinary

Size effect on the ordering of L10 FePt nanoparticles -: art. no. 144419

T Miyazaki et al.

PHYSICAL REVIEW B (2005)

Article Physics, Applied

Size dependence of ordering in FePt nanoparticles

YK Takahashi et al.

JOURNAL OF APPLIED PHYSICS (2004)

Article Physics, Applied

Size effect on the ordering of FePt granular films

YK Takahashi et al.

JOURNAL OF APPLIED PHYSICS (2003)

Article Materials Science, Multidisciplinary

Chemical diffusion in L1(0)-ordered FePt

A Kushida et al.

MATERIALS TRANSACTIONS (2003)

Article Physics, Applied

Microstructure and magnetic properties of FePt-Al-O granular thin films

M Watanabe et al.

APPLIED PHYSICS LETTERS (2000)

Article Materials Science, Multidisciplinary

Growth of Fe on MgO(001) studied by He-atom scattering

G Fahsold et al.

PHYSICAL REVIEW B (2000)