Energy barriers in patterned media

Jeroen de Vries

Research output: ThesisPhD Thesis - Research UT, graduation UT

Abstract

Due to the fact that thermal activation aids in overcoming the energy barrier, the required field for reversal varies from instance to instance for the same island. This thermally induced switching field distribution can be used to determine the difference in energy barrier of magneticallyweak and strong islands. In chapter 3 an alloy aswell as twomultilayer structures are compared using this method. In chapter 4 the temperature dependence of the thermally induced switching field distribution is investigated. For archival purposes it is not the data capacity but the longevity of the data which is most relevant. When we want store information which will outlast the human race, the medium will have different requirements than a mediumused for everyday information storage. For a hard disk, aminimumrequired storage time of 10 years is acceptable, but for such an archival storage system, 1 million to 1 billion years is the relevant timescale. In chapter 5 a storage system has been investigated with high energy barriers which should make data storage for such timescales possible.
LanguageUndefined
Awarding Institution
  • University of Twente
Supervisors/Advisors
  • Elwenspoek, Michael Curt, Supervisor
  • Abelmann, Leon , Advisor
Thesis sponsors
Award date17 Oct 2013
Place of PublicationEnschede
Publisher
Print ISBNs978-90-365-0640-3
DOIs
StatePublished - 17 Oct 2013

Keywords

  • IR-87435
  • METIS-298012
  • TSTNE-Magnet-AHE: Anomalous Hall Effect
  • EWI-24448
  • switching field distribution
  • TST-SMI: Formerly in EWI-SMI

Cite this

de Vries, J. (2013). Energy barriers in patterned media Enschede: Universiteit Twente DOI: 10.3990/1.9789036506403
de Vries, Jeroen. / Energy barriers in patterned media. Enschede : Universiteit Twente, 2013. 98 p.
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title = "Energy barriers in patterned media",
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keywords = "IR-87435, METIS-298012, TSTNE-Magnet-AHE: Anomalous Hall Effect, EWI-24448, switching field distribution, TST-SMI: Formerly in EWI-SMI",
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de Vries, J 2013, 'Energy barriers in patterned media', University of Twente, Enschede. DOI: 10.3990/1.9789036506403

Energy barriers in patterned media. / de Vries, Jeroen.

Enschede : Universiteit Twente, 2013. 98 p.

Research output: ThesisPhD Thesis - Research UT, graduation UT

TY - THES

T1 - Energy barriers in patterned media

AU - de Vries,Jeroen

PY - 2013/10/17

Y1 - 2013/10/17

N2 - Due to the fact that thermal activation aids in overcoming the energy barrier, the required field for reversal varies from instance to instance for the same island. This thermally induced switching field distribution can be used to determine the difference in energy barrier of magneticallyweak and strong islands. In chapter 3 an alloy aswell as twomultilayer structures are compared using this method. In chapter 4 the temperature dependence of the thermally induced switching field distribution is investigated. For archival purposes it is not the data capacity but the longevity of the data which is most relevant. When we want store information which will outlast the human race, the medium will have different requirements than a mediumused for everyday information storage. For a hard disk, aminimumrequired storage time of 10 years is acceptable, but for such an archival storage system, 1 million to 1 billion years is the relevant timescale. In chapter 5 a storage system has been investigated with high energy barriers which should make data storage for such timescales possible.

AB - Due to the fact that thermal activation aids in overcoming the energy barrier, the required field for reversal varies from instance to instance for the same island. This thermally induced switching field distribution can be used to determine the difference in energy barrier of magneticallyweak and strong islands. In chapter 3 an alloy aswell as twomultilayer structures are compared using this method. In chapter 4 the temperature dependence of the thermally induced switching field distribution is investigated. For archival purposes it is not the data capacity but the longevity of the data which is most relevant. When we want store information which will outlast the human race, the medium will have different requirements than a mediumused for everyday information storage. For a hard disk, aminimumrequired storage time of 10 years is acceptable, but for such an archival storage system, 1 million to 1 billion years is the relevant timescale. In chapter 5 a storage system has been investigated with high energy barriers which should make data storage for such timescales possible.

KW - IR-87435

KW - METIS-298012

KW - TSTNE-Magnet-AHE: Anomalous Hall Effect

KW - EWI-24448

KW - switching field distribution

KW - TST-SMI: Formerly in EWI-SMI

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DO - 10.3990/1.9789036506403

M3 - PhD Thesis - Research UT, graduation UT

SN - 978-90-365-0640-3

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de Vries J. Energy barriers in patterned media. Enschede: Universiteit Twente, 2013. 98 p. Available from, DOI: 10.3990/1.9789036506403