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

Richardson, Daniel; Srinivasan, Kumar; Katz, Sidney; Wu, Mingzhong

doi:10.1063/1.4990949

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

Journal Article · Thu Nov 02 00:00:00 EDT 2017 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4990949· OSTI ID:1470132

Richardson, Daniel ^[1]; Srinivasan, Kumar ^[2]; Katz, Sidney ^[1]; Wu, Mingzhong ^[1]

Colorado State Univ., Fort Collins, CO (United States)
Western Digital, San Jose, CA (United States)

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.

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Research Organization:: Energy Frontier Research Centers (EFRC) (United States). Spins and Heat in Nanoscale Electronic Systems (SHINES)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0012670

OSTI ID:: 1470132

Alternate ID(s):: OSTI ID: 1406651

Journal Information:: Applied Physics Letters, Vol. 111, 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; ISSN 0003-6951

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 2 works

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References (26)

Observation of microwave-assisted magnetization reversal in perpendicular recording media Lu, Lei; Wu, Mingzhong; Mallary, Michael Applied Physics Letters, Vol. 103, Issue 4 https://doi.org/10.1063/1.4816798	journal	July 2013
Optimization of the<tex>$hbox SiO_2$</tex>Content in CoPtCr-<tex>$hbox SiO_2$</tex>Perpendicular Recording Media for High-Density Recording Inaba, Y.; Shimatsu, T.; Oikawa, T. IEEE Transactions on Magnetics, Vol. 40, Issue 4 https://doi.org/10.1109/TMAG.2004.832451	journal	July 2004
CoPtCr-SiO/sub 2/ granular media for high-density perpendicular recording Uwazumi, H.; Enomoto, K.; Sakai, Y. IEEE Transactions on Magnetics, Vol. 39, Issue 4 https://doi.org/10.1109/TMAG.2003.813778	journal	July 2003
High performance CoPtCrO single layered perpendicular media with no recording demagnetization Oikawa, S.; Takeo, A.; Hikosaka, T. IEEE Transactions on Magnetics, Vol. 36, Issue 5 https://doi.org/10.1109/20.908443	journal	January 2000
Magnetic characterization of perpendicular recording media IEEE Transactions on Magnetics, Vol. 38, Issue 4 https://doi.org/10.1109/TMAG.2002.1017756	journal	July 2002
Magnetization reversal and activation volume of perpendicular recording media Shimatsu, T.; Uwazumi, H.; Muraoka, H. IEEE Transactions on Magnetics, Vol. 38, Issue 5 https://doi.org/10.1109/TMAG.2002.801790	journal	September 2002
Study of grain interactions in perpendicular magnetic recording media using first order reversal curve diagrams Papusoi, C.; Srinivasan, K.; Acharya, R. Journal of Applied Physics, Vol. 110, Issue 8 https://doi.org/10.1063/1.3652846	journal	October 2011
Switching field distribution of 40 Gbit/in.[sup 2] longitudinal media obtained by subtracting thermal agitation of magnetization Uwazumi, H.; Shimatsu, T.; Kuboki, Y. Journal of Applied Physics, Vol. 91, Issue 10 https://doi.org/10.1063/1.1456393	journal	January 2002
A HAMR Media Technology Roadmap to an Areal Density of 4 Tb/in$^2$ Weller, Dieter; Parker, Gregory; Mosendz, Oleksandr IEEE Transactions on Magnetics, Vol. 50, Issue 1 https://doi.org/10.1109/TMAG.2013.2281027	journal	January 2014
Microstructure and magnetic properties of CoPtCr-SiO/sub 2/ perpendicular recording media Oikawa, T.; Nakamura, M.; Uwazumi, H. IEEE Transactions on Magnetics, Vol. 38, Issue 5 https://doi.org/10.1109/TMAG.2002.801791	journal	September 2002
Simultaneous determination of intergranular interactions and intrinsic switching field distributions in magnetic materials Hovorka, O.; Liu, Y.; Dahmen, K. A. Applied Physics Letters, Vol. 95, Issue 19 https://doi.org/10.1063/1.3263732	journal	November 2009
Determination of switching field distributions for perpendicular recording media van de Veerdonk, R. J. M.; Weller, D. IEEE Transactions on Magnetics, Vol. 39, Issue 1 https://doi.org/10.1109/TMAG.2002.806339	journal	January 2003
A coplanar waveguide permeameter for studying high-frequency properties of soft magnetic materials Ding, Y.; Klemmer, T. J.; Crawford, T. M. Journal of Applied Physics, Vol. 96, Issue 5 https://doi.org/10.1063/1.1774242	journal	September 2004
The effects of different demagnetisation processes on interaction effects in thin film media El-Hilo, M.; O'Grady, K.; Mayo, P. I. IEEE Transactions on Magnetics, Vol. 28, Issue 5 https://doi.org/10.1109/20.179784	journal	September 1992
Remanence curves of thin-film media with a tilted easy magnetisation direction corrected for demagnetisation Bernards, J. P. C.; Cramer, H. A. J. Journal of Magnetism and Magnetic Materials, Vol. 120, Issue 1-3 https://doi.org/10.1016/0304-8853(93)91327-4	journal	March 1993
Topology and elemental distribution in Co alloy:oxide perpendicular media Laughlin, David. E.; Nuhfer, Noel. T.; Park, Soyoung Journal of Applied Physics, Vol. 105, Issue 7 https://doi.org/10.1063/1.3057818	journal	April 2009
/spl Delta/H(M,/spl Delta/M) method for the determination of intrinsic switching field distributions in perpendicular media Berger, A.; Xu, Y.; Lengsfield, B. IEEE Transactions on Magnetics, Vol. 41, Issue 10 https://doi.org/10.1109/TMAG.2005.855285	journal	October 2005
Role of Oxygen Incorporation in Co-Cr-Pt-Si-O Perpendicular Magnetic Recording Media Zheng, M.; Acharya, B. R.; Choe, G. IEEE Transactions on Magnetics, Vol. 40, Issue 4 https://doi.org/10.1109/TMAG.2004.832167	journal	July 2004
Effective Switching Field Distribution Evaluation Using Saturation Field in Minor Loop* Hinata, Shintaro; Saito, Shin; Itagaki, Norikazu IEEE Transactions on Magnetics, Vol. 48, Issue 3 https://doi.org/10.1109/TMAG.2012.2187129	journal	March 2012
High-potential magnetic anisotropy of CoPtCr-SiO/sub 2/ perpendicular recording media Shimatsu, T.; Sato, H.; Oikawa, T. IEEE Transactions on Magnetics, Vol. 41, Issue 2 https://doi.org/10.1109/TMAG.2004.838071	journal	February 2005
Intergranular Exchange Coupling Field Under Multidomain State for Stacked Perpendicular Recording Media Evaluated by Ferromagnetic Resonance Hinata, Shintaro; Saito, Shin; Takahashi, Migaku IEEE Transactions on Magnetics, Vol. 48, Issue 11 https://doi.org/10.1109/TMAG.2012.2203114	journal	November 2012
Initial Growth Layer and Magnetic Properties of CoCrPt Perpendicular Media. [ＣｏＣｒＰｔ‐（Ｔａ，Ｂ）垂直記録媒体の初期成長層の低減と磁気特性] Uwazumi, H.; Shimatsu, T.; Terakawa, M. Journal of the Magnetics Society of Japan, Vol. 26, Issue 4 https://doi.org/10.3379/jmsjmag.26.205	journal	January 2002
Perpendicular ferromagnetic resonance measurements of damping and Land $\overset{́}{e} g -$ factor in sputtered (Co $_{2}$ Mn) $_{1 - x}$ Ge $_{x}$ thin films Nembach, H. T.; Silva, T. J.; Shaw, J. M. Physical Review B, Vol. 84, Issue 5 https://doi.org/10.1103/PhysRevB.84.054424	journal	August 2011
Determination of intrinsic switching field distributions in perpendicular recording media: Numerical study of the $Δ H (M, Δ M)$ method Liu, Yang; Dahmen, Karin A.; Berger, A. Physical Review B, Vol. 77, Issue 5 https://doi.org/10.1103/PhysRevB.77.054422	journal	February 2008
Relationships between high density recording performance and particle coercivity distribution Tagawa, I.; Nakamura, Y. IEEE Transactions on Magnetics, Vol. 27, Issue 6 https://doi.org/10.1109/20.278712	journal	November 1991
Pt Content Dependence of the Switching Field Distributions of CoPtCr-SiO$_{2}$ Perpendicular Media Characterized by Subtracting the Effect of Thermal Agitation Shimatsu, T.; Kondo, T.; Mitsuzuka, K. IEEE Transactions on Magnetics, Vol. 43, Issue 6 https://doi.org/10.1109/TMAG.2007.892586	journal	June 2007

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FIG. 3(p. 4)

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