Simulation and Analysis of Co-Pt Based Granular Magnetic Recording Media Near the Curie Temperature

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dc.contributor.advisorPisana, Simone
dc.contributor.authorKammula, Aaron
dc.date.accessioned2024-07-18T21:27:09Z
dc.date.available2024-07-18T21:27:09Z
dc.date.copyright2024-04-18
dc.date.issued2024-07-18
dc.date.updated2024-07-18T21:27:08Z
dc.degree.disciplineElectrical and Computer Engineering
dc.degree.levelMaster's
dc.degree.nameMASc - Master of Applied Science
dc.description.abstractHeat-assisted magnetic recording (HAMR) has been shown to satisfy modern data storage of hard disk drives by enabling the writing of high-anisotropy materials such as Fe-Pt. Modelling the magnetization dynamics near the Curie temperature (Tc) is crucial when predicting the limits of HAMR or any technology that relies on fast, high temperature magnetization control. However, there are some differences in how magnetic grains behave under conditions important to HAMR, such as cooling rate and magnetic field angle. Such differences arise from how thermal fluctuations are modeled in the stochastic Landau-Lifshitz-Gilbert equation. Therefore, it is important to benchmark these results against experiments to validate theoretical models. Here, we model the switching probability of granular Co-Pt media with VAMPIRE’s atomistic simulator as preparation for experiments. Unlike Fe-Pt, Co-Pt thin-films serve as a good benchmark due to their tunable composition, allowing us to generously change parameters like saturation magnetization, anisotropy and Tc.
dc.identifier.urihttps://hdl.handle.net/10315/42191
dc.languageen
dc.rightsAuthor owns copyright, except where explicitly noted. Please contact the author directly with licensing requests.
dc.subjectMaterials Science
dc.subjectHigh temperature physics
dc.subjectElectrical engineering
dc.subject.keywordsCurie temperature
dc.subject.keywordsVAMPIRE
dc.subject.keywordsAnisotropy
dc.subject.keywordsHard-disk drive
dc.subject.keywordsHAMR
dc.subject.keywordsMagnetization dynamics
dc.subject.keywordsMagnetism
dc.subject.keywordsSpin dynaimcs
dc.subject.keywordsSwitching probability
dc.subject.keywordsThermodynamics
dc.subject.keywordsStatistical mechanics
dc.subject.keywordsFerromagnetism
dc.subject.keywordsMagnetic media
dc.subject.keywordsElectrical engineering
dc.subject.keywordsComputer science
dc.subject.keywordsHysteresis
dc.subject.keywordsMultilayer
dc.subject.keywordsEffective-medium model
dc.subject.keywordsSpin dynamics
dc.subject.keywordsElectron orbitals
dc.subject.keywordsNear field transducer
dc.titleSimulation and Analysis of Co-Pt Based Granular Magnetic Recording Media Near the Curie Temperature
dc.typeElectronic Thesis or Dissertation

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