Wd Media, LLC

Uchicago Argonne, LLC

Chengjun Sun

B Ramamurthy Acharya

Donald C Stafford

Shelly D Kelly

Maria K Chan

Xiaoyi Zhang

Steve Heald

Mikhail A Solovyev

Spectroscopy systems require a crystal having specific properties for analyzing a spectrum of a sample, which is typically performed for measuring the presence of one element at a time. A two-dimensional (2D) crystal mount for performing simultaneous spectroscopy measurements includes a crystal holder having multiple rows of crystal mounts. Each crystal mount is positioned and orientated to physically support a crystal at a fixed position and fixed orientation relative to an optical axis. A sample provides radiation to analyzer crystals disposed in the crystal mounts, and a detector may detect radiation reflected from the analyzer crystals, for performing multiple simultaneous spectroscopy measurements.

Advanced X-ray emission spectrometers

FePt-based perpendicular magnetic recording (PMR) media including an epitaxial exchanged coupling layer (EECL) between FePtX magnetic recording layers. The degree of exchange coupling may be modulated by the EECL while the texture is transferred between the magnetic recording layers. With an EECL of proper composition and thickness, the FePt-based composite media has high anisotropy field and low saturation magnetic field.

Perpendicular magnetic recording medium with epitaxial exchange coupling layer

FePt-based perpendicular magnetic recording (PMR) media including an ordering temperature reducing layer between a bottom FePtX magnetic recording layer and a nucleation layer. In one embodiment, an ordering temperature reducing layer of carbon is employed to lower the L10 ordering temperature of a FePtC recording layer.

Perpendicular magnetic recording medium with an ordering temperature reducing layer

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Naperville, IL, United States of America

Chengjun Sun