Strukturelle, elektrische und magnetische Eigenschaften dünner granularer CoxC1-x und (Co/Pt)xC1-x-Schichten

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00_Titel_Inhalt.pdf17.03.2003 00:00:0034,8 KB
01_Kap_1.pdf17.03.2003 00:00:0045,6 KB
02_Kap_2.pdf17.03.2003 00:00:00373 KB
03_Kap_3.pdf17.03.2003 00:00:00294,3 KB
04_Kap_4.1.pdf17.03.2003 00:00:009,72 MB
05_Kap_4.2.pdf17.03.2003 00:00:00729,1 KB
06_Kap_4.3.pdf17.03.2003 00:00:004,52 MB
07_Kap_4.4.pdf17.03.2003 00:00:007,11 MB
08_Kap_5.pdf17.03.2003 00:00:00110,9 KB
index.html30.03.2007 17:48:4815,6 KB
inhalt.htm17.03.2003 00:00:007,1 KB
weinforthdiss.pdf17.03.2003 00:00:0022,88 MB
Granular CoxC1-x and (Co/Pt)xC1-x thin films with different metal-volume fractions x are prepared by simultanious electron beam evaporation of Co or CoPt and C targets. The films are condensed on NaCl- and quartz substrates. The structure of the films is controlled by choosing different substrate temperatures Ts in the range between 20°C and 350°C as well as by annealing the thin film samples after generation at temperatures Ta between 200°C and 700°C. The structural properties of the films are examined by means of transmission electron microscopy and electron diffraction. Electrical resistivity of the films is measured in the temperature range between T = 4.2K and T = 300K. In order to reveal the magnetic properties of the granular thin films a SQUID magnetometer is used. In addition to the measurement of hysteresis loops at T = 4.2K and T = 300K, remanent magnetisation curves are measured in order to examine the magnetic coupling between the particles of the granular films. Additionally magnetoresistance measurements are performed at T = 4.2K.
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Dokumententyp:
Wissenschaftliche Abschlussarbeiten » Dissertation
Fakultät / Institut:
Fakultät für Physik
Dewey Dezimal-Klassifikation:
500 Naturwissenschaften und Mathematik » 530 Physik
Stichwörter:
exchange interaction, Stoner Wohlfarth particle, magnetization reversal, SQUID, TEM, granular magnetic films, magnetorsistance, magnetic dipolar interaction, magnetic coupling
Beitragende:
Prof. em. Dr. Wassermann, Eberhard F. [Betreuer(in), Doktorvater]
Prof. Dr. Kleemann, Wolfgang [Gutachter(in), Rezensent(in)]
Sprache:
Deutsch
Kollektion / Status:
Dissertationen / Dokument veröffentlicht
Datum der Promotion:
17.03.2003
Dokument erstellt am:
17.03.2003
Dateien geändert am:
30.03.2007
Medientyp:
Text