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Title: Correlative Magnetic Imaging of Heat-Assisted Magnetic Recording Media in Cross Section Using Lorentz TEM and MFM

Abstract

In order to increase the storage density of hard disk drives, a detailed understanding of the magnetic structure of the granular magnetic layer is essential. Here, we demonstrate an experimental procedure of imaging recorded bits on heat-assisted magnetic recording (HAMR) media in cross section using Lorentz transmission electron microscopy (TEM). With magnetic force microscopy and focused ion beam (FIB), we successfully targeted a single track to prepare cross-sectional TEM specimens. Then, we characterized the magnetic structure of bits with their precise location and orientation using Fresnel mode of Lorentz TEM. Here, this method can promote understanding of the correlation between bits and their material structure in HAMR media to design better the magnetic layer.

Authors:
ORCiD logo [1];  [2];  [3];  [1];  [4];  [4];  [4];  [4];  [4];  [4];  [4];  [1]
  1. Stanford Univ., Stanford, CA (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States); Northwestern Univ., Evanston, IL (United States)
  4. Western Digital Corp., San Jose, CA (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22), Materials Sciences and Engineering Division; National Science Foundation (NSF)
OSTI Identifier:
1405331
Grant/Contract Number:
AC02-06CH11357
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
IEEE Transactions on Magnetics
Additional Journal Information:
Journal Volume: PP; Journal Issue: 99; Journal ID: ISSN 0018-9464
Publisher:
Institute of Electrical and Electronics Engineers. Magnetics Group
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 36 MATERIALS SCIENCE

Citation Formats

Kim, Taeho Roy, Phatak, Charudatta, Petford-Long, Amanda K., Liu, Yunzhi, Taylor, Chad, Zhang, Bing, Myers, Sharon, Greene, Andrea, Seki, Tomoko, Alex, Michael, Bertero, Gerardo A., and Sinclair, Robert. Correlative Magnetic Imaging of Heat-Assisted Magnetic Recording Media in Cross Section Using Lorentz TEM and MFM. United States: N. p., 2017. Web. doi:10.1109/TMAG.2017.2753170.
Kim, Taeho Roy, Phatak, Charudatta, Petford-Long, Amanda K., Liu, Yunzhi, Taylor, Chad, Zhang, Bing, Myers, Sharon, Greene, Andrea, Seki, Tomoko, Alex, Michael, Bertero, Gerardo A., & Sinclair, Robert. Correlative Magnetic Imaging of Heat-Assisted Magnetic Recording Media in Cross Section Using Lorentz TEM and MFM. United States. doi:10.1109/TMAG.2017.2753170.
Kim, Taeho Roy, Phatak, Charudatta, Petford-Long, Amanda K., Liu, Yunzhi, Taylor, Chad, Zhang, Bing, Myers, Sharon, Greene, Andrea, Seki, Tomoko, Alex, Michael, Bertero, Gerardo A., and Sinclair, Robert. Mon . "Correlative Magnetic Imaging of Heat-Assisted Magnetic Recording Media in Cross Section Using Lorentz TEM and MFM". United States. doi:10.1109/TMAG.2017.2753170.
@article{osti_1405331,
title = {Correlative Magnetic Imaging of Heat-Assisted Magnetic Recording Media in Cross Section Using Lorentz TEM and MFM},
author = {Kim, Taeho Roy and Phatak, Charudatta and Petford-Long, Amanda K. and Liu, Yunzhi and Taylor, Chad and Zhang, Bing and Myers, Sharon and Greene, Andrea and Seki, Tomoko and Alex, Michael and Bertero, Gerardo A. and Sinclair, Robert},
abstractNote = {In order to increase the storage density of hard disk drives, a detailed understanding of the magnetic structure of the granular magnetic layer is essential. Here, we demonstrate an experimental procedure of imaging recorded bits on heat-assisted magnetic recording (HAMR) media in cross section using Lorentz transmission electron microscopy (TEM). With magnetic force microscopy and focused ion beam (FIB), we successfully targeted a single track to prepare cross-sectional TEM specimens. Then, we characterized the magnetic structure of bits with their precise location and orientation using Fresnel mode of Lorentz TEM. Here, this method can promote understanding of the correlation between bits and their material structure in HAMR media to design better the magnetic layer.},
doi = {10.1109/TMAG.2017.2753170},
journal = {IEEE Transactions on Magnetics},
number = 99,
volume = PP,
place = {United States},
year = {Mon Oct 23 00:00:00 EDT 2017},
month = {Mon Oct 23 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on October 23, 2018
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