TITLE

Determination of first and second magnetic anisotropy constants of magnetic recording media

AUTHOR(S)
Endo, Yasushi; Kitakami, Osamu; Okamoto, Satoshi; Shimada, Yutaka
PUB. DATE
September 2000
SOURCE
Applied Physics Letters;9/11/2000, Vol. 77 Issue 11
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We propose a simple method to evaluate the first and second magnetic anisotropy constants of high-density magnetic recording media with their easy axis in the film plane. By measuring the magnetization curve along the film normal, uniaxial anisotropy constants K[sub 1] and K[sub 2] can be determined simultaneously. The present method has been applied to (11·0) oriented CoCrPtTa hard disk media. The measured anisotropy constants are presented along with their temperature dependence. We also point out serious shortcomings of the currently used evaluation methods, such as the rotational hysteresis method and the singular point detection technique, which usually overestimate the magnetic anisotropy constant. © 2000 American Institute of Physics.
ACCESSION #
4413699

 

Related Articles

  • Delivering high picture quality.  // International Fire & Security Product News;Aug2003, Vol. 28 Issue 4, p9 

    Reports on the hard disk digital recorders introduced by Sony in Great Britain. Features of the recorders; Benefits obtained from the recorders.

  • NEW GEAR. Fortner, Stephen // Keyboard;Jul2006, Vol. 32 Issue 7, p18 

    The article features new equipment for keyboardists. They include the Korg C-250 digital piano, the Toontrack EZ Drummer AudioUnit drum machine, the Gator GSRW-2U laptop mobile recording case, the Sonic Implants MUSE keyboard, the Accugrove Tri-112L 3-way speaker and the Korg D-888 personal hard...

  • Edirol rides HDD wave. Fox, David // TVB Europe;Mar2005, Vol. 14 Issue 3, p20 

    This article reports that Edirol Corp. has introduced a new, low-cost 4-channel portable hard disk recorder and WAVE editor. The 24-bit, 96kHz capable R-4 costs about 900 pounds and should start shipping this month. It has a 40GB hard drive, for up to 17 hours at maximum quality. Other features...

  • Sub-6-nm grain size control in polycrystalline thin films using synthetic nucleation layer. Piramanayagam, S. N.; Srinivasan, K. // Applied Physics Letters;10/1/2007, Vol. 91 Issue 14, p142508 

    A key objective in the design of recording media for hard disk drives is to tailor the grain size. A fourfold increase in the recording density from the current levels demands that the mean grain diameter be reduced from 7 to about 5.5 nm, and distribution to below 15%. Traditional techniques...

  • PANASONIC/ IBM TEAM UP.  // SDM: Security Distributing & Marketing;Jan2003, Vol. 33 Issue 1, p114 

    Introduces the WJ-HD500AV2, a hard disk recorder with digital media infrastructure from partnered business Panasonic Security Systems and International Business Machines Corp. Contact information; Availability of the product; Specifications of the item.

  • Perpendicular recording media for hard disk drives. Piramanayagam, S. N. // Journal of Applied Physics;7/1/2007, Vol. 102 Issue 1, p011301 

    Perpendicular recording technology has recently been introduced in hard disk drives for computer and consumer electronics applications. Although conceptualized in the late 1970s, making a product with perpendicular recording that has competing performance, reliability, and price advantage over...

  • Spin transfer torque switching assisted by thermally induced anisotropy reorientation in perpendicular magnetic tunnel junctions. Bandiera, S.; Sousa, R. C.; Marins de Castro, M.; Ducruet, C.; Portemont, C.; Auffret, S.; Vila, L.; Prejbeanu, I. L.; Rodmacq, B.; Dieny, B. // Applied Physics Letters;11/14/2011, Vol. 99 Issue 20, p202507 

    A method to switch the magnetization of the free layer in magnetic tunnel junctions with perpendicular anisotropy is demonstrated. It consists in assisting the spin transfer switching of the magnetization by a thermally induced reorientation of the free layer magnetic anisotropy from...

  • Advanced perpendicular recording media structure with a magnetic intermediate layer. Piramanayagam, S. N.; Zhao, H. B.; Shi, J. Z.; Mah, C. S. // Applied Physics Letters;2/27/2006, Vol. 88 Issue 9, p092501 

    CoCrPt–SiO2 perpendicular recording media containing a CoCr-based magnetic layer as an intermediate layer was studied. CoCr film deposited on a growth control layer such as Ta could grow with a hcp[0002] out-of-plane orientation, which could induce the desired perpendicular easy-axis...

  • Dot arrays of L10-type FePt ordered alloy perpendicular films fabricated using low-temperature sputter film deposition. Shimatsu, T.; Inaba, Y.; Kataoka, H.; Sayama, J.; Aoi, H.; Okamoto, S.; Kitakami, O. // Journal of Applied Physics;Apr2011, Vol. 109 Issue 7, p07B726 

    Using ultrahigh vacuum sputter film deposition, we fabricated L10-type Fe50Pt50 ordered alloy perpendicular films on MgO(001) single-crystal substrates and 2.5 in. glass disks at low substrate temperatures of 200-350 °C. Then we examined the magnetic properties of the dot arrays made from...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics