Correlation between activation volume and intergranular magnetic interaction in longitudinal media

M. Mikami; D. D. Djayaprawira; T. K. Kong; S. Yoshimura; A. Horii; M. Takahashi

doi:10.1109/20.950878

Correlation between activation volume and intergranular magnetic interaction in longitudinal media

M. Mikami, D. D. Djayaprawira, T. K. Kong, S. Yoshimura, A. Horii, M. Takahashi

Research output: Contribution to journal › Conference article

8 Citations (Scopus)

Abstract

We have investigated the correlation between activation grain diameter derived from activation volume and intergranular magnetic interaction, in CoCrPt-based thin film media fabricated by ultra clean sputtering process. As the results, we found that activation grain diameter depends on the physical grain diameter and intergranular exchange interaction, but is independent of intergranular magnetostatic interaction (4πM_s/H_k^grain). The activation grain diameter normalized by physical grain diameter, which corresponds with normalized coercivity (H_c/H_k^grain) and microstructure, well indicate the character of intergranular exchange interaction in the media with various compositions. It is also clarified that the media noise can be characterized by activation grain diameter together with intergranular magnetostatic interaction.

Original language	English
Pages (from-to)	1484-1487
Number of pages	4
Journal	IEEE Transactions on Magnetics
Volume	37
Issue number	4 I
DOIs	https://doi.org/10.1109/20.950878
Publication status	Published - 2001 Jul 1
Event	8th Joint Magnetism and Magnetic Materials -International Magnetic Conference- (MMM-Intermag) - San Antonio, TX, United States Duration: 2001 Jan 7 → 2001 Jan 11

Keywords

Activation volume
Exchange interaction
Longitudinal media
Thin film

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

Access to Document

10.1109/20.950878

Fingerprint Dive into the research topics of 'Correlation between activation volume and intergranular magnetic interaction in longitudinal media'. Together they form a unique fingerprint.

Cite this

Mikami, M., Djayaprawira, D. D., Kong, T. K., Yoshimura, S., Horii, A., & Takahashi, M. (2001). Correlation between activation volume and intergranular magnetic interaction in longitudinal media. IEEE Transactions on Magnetics, 37(4 I), 1484-1487. https://doi.org/10.1109/20.950878

@article{3a68d411b5874fa1ad8060fc5978a0be,

title = "Correlation between activation volume and intergranular magnetic interaction in longitudinal media",

abstract = "We have investigated the correlation between activation grain diameter derived from activation volume and intergranular magnetic interaction, in CoCrPt-based thin film media fabricated by ultra clean sputtering process. As the results, we found that activation grain diameter depends on the physical grain diameter and intergranular exchange interaction, but is independent of intergranular magnetostatic interaction (4πMs/Hkgrain). The activation grain diameter normalized by physical grain diameter, which corresponds with normalized coercivity (Hc/Hkgrain) and microstructure, well indicate the character of intergranular exchange interaction in the media with various compositions. It is also clarified that the media noise can be characterized by activation grain diameter together with intergranular magnetostatic interaction.",

keywords = "Activation volume, Exchange interaction, Longitudinal media, Thin film",

author = "M. Mikami and Djayaprawira, {D. D.} and Kong, {T. K.} and S. Yoshimura and A. Horii and M. Takahashi",

year = "2001",

month = jul,

day = "1",

doi = "10.1109/20.950878",

language = "English",

volume = "37",

pages = "1484--1487",

journal = "IEEE Transactions on Magnetics",

issn = "0018-9464",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

number = "4 I",

note = "8th Joint Magnetism and Magnetic Materials -International Magnetic Conference- (MMM-Intermag) ; Conference date: 07-01-2001 Through 11-01-2001",

}

TY - JOUR

T1 - Correlation between activation volume and intergranular magnetic interaction in longitudinal media

AU - Mikami, M.

AU - Djayaprawira, D. D.

AU - Kong, T. K.

AU - Yoshimura, S.

AU - Horii, A.

AU - Takahashi, M.

PY - 2001/7/1

Y1 - 2001/7/1

N2 - We have investigated the correlation between activation grain diameter derived from activation volume and intergranular magnetic interaction, in CoCrPt-based thin film media fabricated by ultra clean sputtering process. As the results, we found that activation grain diameter depends on the physical grain diameter and intergranular exchange interaction, but is independent of intergranular magnetostatic interaction (4πMs/Hkgrain). The activation grain diameter normalized by physical grain diameter, which corresponds with normalized coercivity (Hc/Hkgrain) and microstructure, well indicate the character of intergranular exchange interaction in the media with various compositions. It is also clarified that the media noise can be characterized by activation grain diameter together with intergranular magnetostatic interaction.

AB - We have investigated the correlation between activation grain diameter derived from activation volume and intergranular magnetic interaction, in CoCrPt-based thin film media fabricated by ultra clean sputtering process. As the results, we found that activation grain diameter depends on the physical grain diameter and intergranular exchange interaction, but is independent of intergranular magnetostatic interaction (4πMs/Hkgrain). The activation grain diameter normalized by physical grain diameter, which corresponds with normalized coercivity (Hc/Hkgrain) and microstructure, well indicate the character of intergranular exchange interaction in the media with various compositions. It is also clarified that the media noise can be characterized by activation grain diameter together with intergranular magnetostatic interaction.

KW - Activation volume

KW - Exchange interaction

KW - Longitudinal media

KW - Thin film

UR - http://www.scopus.com/inward/record.url?scp=0035386231&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0035386231&partnerID=8YFLogxK

U2 - 10.1109/20.950878

DO - 10.1109/20.950878

M3 - Conference article

AN - SCOPUS:0035386231

VL - 37

SP - 1484

EP - 1487

JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

SN - 0018-9464

IS - 4 I

T2 - 8th Joint Magnetism and Magnetic Materials -International Magnetic Conference- (MMM-Intermag)

Y2 - 7 January 2001 through 11 January 2001

ER -