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Title: Quantification of intergranular exchange coupling in CoPtCr-based perpendicular recording media via ferromagnetic resonance measurements

Abstract

In this study, intergranular exchange fields in CoPtCr granular media materials were quantified through ferromagnetic resonance measurements in various magnetic states. The data indicate that the exchange field in CoPtCr granular films with no oxide segregant is comparable to the saturation magnetization of the films. With an introduction of a SiO2 segregant, however, the exchange field decreases. A 30% volume fraction of the segregant reduces the strength of the intergranular exchange coupling to zero.

Authors:
 [1];  [2];  [1];  [1]
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  1. Colorado State Univ., Fort Collins, CO (United States)
  2. Western Digital, San Jose, CA (United States)
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Spins and Heat in Nanoscale Electronic Systems (SHINES)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1470132
Alternate Identifier(s):
OSTI ID: 1406651
Grant/Contract Number:  
SC0012670
Resource Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 111; Journal Issue: 18; Related Information: SHINES partners with University of California, Riverside (lead); Arizona State University; Colorado State University; Johns Hopkins University; University of California Irvine; University of California Los Angeles; University of Texas at Austin; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; phonons; thermal conductivity; thermoelectric; spin dynamics; spintronics

Citation Formats

Richardson, Daniel, Srinivasan, Kumar, Katz, Sidney, and Wu, Mingzhong. Quantification of intergranular exchange coupling in CoPtCr-based perpendicular recording media via ferromagnetic resonance measurements. United States: N. p., 2017. Web. doi:10.1063/1.4990949.
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Richardson, Daniel, Srinivasan, Kumar, Katz, Sidney, & Wu, Mingzhong. Quantification of intergranular exchange coupling in CoPtCr-based perpendicular recording media via ferromagnetic resonance measurements. United States. https://doi.org/10.1063/1.4990949
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Richardson, Daniel, Srinivasan, Kumar, Katz, Sidney, and Wu, Mingzhong. Thu . "Quantification of intergranular exchange coupling in CoPtCr-based perpendicular recording media via ferromagnetic resonance measurements". United States. https://doi.org/10.1063/1.4990949. https://www.osti.gov/servlets/purl/1470132.
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@article{osti_1470132,
title = {Quantification of intergranular exchange coupling in CoPtCr-based perpendicular recording media via ferromagnetic resonance measurements},
author = {Richardson, Daniel and Srinivasan, Kumar and Katz, Sidney and Wu, Mingzhong},
abstractNote = {In this study, intergranular exchange fields in CoPtCr granular media materials were quantified through ferromagnetic resonance measurements in various magnetic states. The data indicate that the exchange field in CoPtCr granular films with no oxide segregant is comparable to the saturation magnetization of the films. With an introduction of a SiO2 segregant, however, the exchange field decreases. A 30% volume fraction of the segregant reduces the strength of the intergranular exchange coupling to zero.},
doi = {10.1063/1.4990949},
journal = {Applied Physics Letters},
number = 18,
volume = 111,
place = {United States},
year = {2017},
month = {11}
}
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Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1063/1.4990949
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Cited by: 1 work
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Figures / Tables:

FIG. 1 FIG. 1: Static magnetic properties of the samples. (a)–(c) The saturation induction 4more » $\pi$$M_{s}$, effective perpendicular anisotropy field Hk, and coercivity Hc as a function of the volume fraction of the SiO2 segregant. (d) The magnetic hysteresis loops of the four samples, where the vertical axis shows the remnant magnetization Mr to saturation magnetization Ms ratio.« less
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Works referenced in this record:

Observation of microwave-assisted magnetization reversal in perpendicular recording media
journal, July 2013

  • Lu, Lei; Wu, Mingzhong; Mallary, Michael
  • Applied Physics Letters, Vol. 103, Issue 4
  • DOI: 10.1063/1.4816798

Optimization of the<tex>$hbox SiO_2$</tex>Content in CoPtCr-<tex>$hbox SiO_2$</tex>Perpendicular Recording Media for High-Density Recording
journal, July 2004

CoPtCr-SiO/sub 2/ granular media for high-density perpendicular recording
journal, July 2003

High performance CoPtCrO single layered perpendicular media with no recording demagnetization
journal, January 2000

  • Oikawa, S.; Takeo, A.; Hikosaka, T.
  • IEEE Transactions on Magnetics, Vol. 36, Issue 5
  • DOI: 10.1109/20.908443

Magnetic characterization of perpendicular recording media
journal, July 2002

Magnetization reversal and activation volume of perpendicular recording media
journal, September 2002

Study of grain interactions in perpendicular magnetic recording media using first order reversal curve diagrams
journal, October 2011

  • Papusoi, C.; Srinivasan, K.; Acharya, R.
  • Journal of Applied Physics, Vol. 110, Issue 8
  • DOI: 10.1063/1.3652846

Switching field distribution of 40 Gbit/in.[sup 2] longitudinal media obtained by subtracting thermal agitation of magnetization
journal, January 2002

  • Uwazumi, H.; Shimatsu, T.; Kuboki, Y.
  • Journal of Applied Physics, Vol. 91, Issue 10
  • DOI: 10.1063/1.1456393

A HAMR Media Technology Roadmap to an Areal Density of 4 Tb/in$^2$
journal, January 2014

  • Weller, Dieter; Parker, Gregory; Mosendz, Oleksandr
  • IEEE Transactions on Magnetics, Vol. 50, Issue 1
  • DOI: 10.1109/TMAG.2013.2281027

Microstructure and magnetic properties of CoPtCr-SiO/sub 2/ perpendicular recording media
journal, September 2002

Simultaneous determination of intergranular interactions and intrinsic switching field distributions in magnetic materials
journal, November 2009

  • Hovorka, O.; Liu, Y.; Dahmen, K. A.
  • Applied Physics Letters, Vol. 95, Issue 19
  • DOI: 10.1063/1.3263732

Determination of switching field distributions for perpendicular recording media
journal, January 2003

A coplanar waveguide permeameter for studying high-frequency properties of soft magnetic materials
journal, September 2004

  • Ding, Y.; Klemmer, T. J.; Crawford, T. M.
  • Journal of Applied Physics, Vol. 96, Issue 5
  • DOI: 10.1063/1.1774242

The effects of different demagnetisation processes on interaction effects in thin film media
journal, September 1992

  • El-Hilo, M.; O'Grady, K.; Mayo, P. I.
  • IEEE Transactions on Magnetics, Vol. 28, Issue 5
  • DOI: 10.1109/20.179784

Remanence curves of thin-film media with a tilted easy magnetisation direction corrected for demagnetisation
journal, March 1993

Topology and elemental distribution in Co alloy:oxide perpendicular media
journal, April 2009

  • Laughlin, David. E.; Nuhfer, Noel. T.; Park, Soyoung
  • Journal of Applied Physics, Vol. 105, Issue 7
  • DOI: 10.1063/1.3057818

/spl Delta/H(M,/spl Delta/M) method for the determination of intrinsic switching field distributions in perpendicular media
journal, October 2005

Role of Oxygen Incorporation in Co-Cr-Pt-Si-O Perpendicular Magnetic Recording Media
journal, July 2004

Effective Switching Field Distribution Evaluation Using Saturation Field in Minor Loop*
journal, March 2012

  • Hinata, Shintaro; Saito, Shin; Itagaki, Norikazu
  • IEEE Transactions on Magnetics, Vol. 48, Issue 3
  • DOI: 10.1109/TMAG.2012.2187129

High-potential magnetic anisotropy of CoPtCr-SiO/sub 2/ perpendicular recording media
journal, February 2005

Intergranular Exchange Coupling Field Under Multidomain State for Stacked Perpendicular Recording Media Evaluated by Ferromagnetic Resonance
journal, November 2012

  • Hinata, Shintaro; Saito, Shin; Takahashi, Migaku
  • IEEE Transactions on Magnetics, Vol. 48, Issue 11
  • DOI: 10.1109/TMAG.2012.2203114

Perpendicular ferromagnetic resonance measurements of damping and Land e ́ g − factor in sputtered (Co 2 Mn) 1 − x Ge x thin films
journal, August 2011

Relationships between high density recording performance and particle coercivity distribution
journal, November 1991

  • Tagawa, I.; Nakamura, Y.
  • IEEE Transactions on Magnetics, Vol. 27, Issue 6
  • DOI: 10.1109/20.278712
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