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The influence of interface roughness on the magnetic properties of exchange biased CoO/Fe thin films
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10.1063/1.3391470
/content/aip/journal/jap/107/11/10.1063/1.3391470
http://aip.metastore.ingenta.com/content/aip/journal/jap/107/11/10.1063/1.3391470

Figures

Image of FIG. 1.
FIG. 1.

XRR profiles (open circles) and respective fits (solid lines) for /CoO/Fe films deposited on an oxidized Si substrate where represents the respective Ag film thickness. From upper to lower curve: no Ag layer, , 96, 144, 151, and 403 Å Ag layer. The curves have been shifted vertically for clarity.

Image of FIG. 2.
FIG. 2.

Surface topography of Fe films recorded with in situ STM for a scan area of for (a) CoO/Fe and (b) Ag(151 Å)/CoO/Fe. The average grain size in (a) is 150 Å and 500 Å in (b). Graph (c) shows the evolution of the rms roughness as a function of scanning length derived from the STM measurements.

Image of FIG. 3.
FIG. 3.

(a)–(d) Initial (solid line) and trained (dashed line) VSM hysteresis loops recorded consecutively after field cooling in 0.4 T to 10 K. (a) CoO/Fe and (b)–(d) /CoO/Fe samples with , 96 and 144 Å, respectively.

Image of FIG. 4.
FIG. 4.

Evolution of (triangles) and (squares) as well as (dots) with the Ag film roughness (and thickness) as determined from magnetization measurements after field cooling in 0.4 T to 10 K for /CoO/Fe films. The open symbols refer to a CoO/Fe sample without a Ag buffer layer. The dashed lines are a guide for the eye.

Image of FIG. 5.
FIG. 5.

(a)–(d) AMR of the initial (solid line) and trained (dashed line) loop recorded consecutively after field cooling in 0.4 T to 10 K. (a) shows a CoO/Fe and (b)–(d) /CoO/Fe samples with , 96, and 144 Å, respectively. The data were taken with the current in plane and perpendicular to the in-plane magnetic field.

Image of FIG. 6.
FIG. 6.

Temperature dependence of (upper graph) as well as and (lower graph) deduced from the initial hysteresis loops recorded with VSM after field cooling in 0.4 T to 10 K. The squares correspond to the CoO/Fe sample. The triangles/dots represent /CoO/Fe samples with and 144 Å, respectively.

Image of FIG. 7.
FIG. 7.

Change in anisotropic magnetoresistance with time for a Ag(21 Å)/CoO/Fe sample field cooled in 0.4 T to 10 K. The external field was fixed near of the initial and trained loop; and of the initial loop.

Tables

Generic image for table
Table I.

Relevant structural and magnetic properties for all samples (S1–S6) investigated.

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/content/aip/journal/jap/107/11/10.1063/1.3391470
2010-06-02
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: The influence of interface roughness on the magnetic properties of exchange biased CoO/Fe thin films
http://aip.metastore.ingenta.com/content/aip/journal/jap/107/11/10.1063/1.3391470
10.1063/1.3391470
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