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Direct observation of magnetization reversal and low field magnetoresistance of epitaxial La0.7Sr0.3MnO3/SrTiO3 (001) thin films at room temperature
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10.1063/1.4730966
/content/aip/journal/jap/112/1/10.1063/1.4730966
http://aip.metastore.ingenta.com/content/aip/journal/jap/112/1/10.1063/1.4730966

Figures

Image of FIG. 1.
FIG. 1.

Optical microscope photography of (a) the 50 μm and (b) the 100 μm wide microbridges. Symbols (I, I+) and (V, V+) show the current and voltage gold pads used in this study, respectively. The red dotted lines define the surfaces used for the calculation of normalized magnetization reported in Figure 4. The distance between current and voltage electrodes are 500 μm and 300 μm, respectively.

Image of FIG. 2.
FIG. 2.

Longitudinal MOKE microscopy images at room temperature during magnetization reversal in (a) the 50 μm wide bridge and (b) the 100 μm wide LSMO bridge when the in-plane magnetic field is applied parallel to the bridge length. The magnetic field values are indicated for each image.

Image of FIG. 3.
FIG. 3.

Longitudinal MOKE microscopy images at room temperature during magnetization reversal in (a) the 50 μm wide bridge and (b) the 100 μm wide LSMO bridge when the in-plane magnetic field is applied perpendicular to the bridge length. The magnetic field values are indicated for each image.

Image of FIG. 4.
FIG. 4.

Magnetic hysteresis loops versus applied magnetic field where the reported normalized magnetization is the intensity averaged over a rectangle of surface W × 500 μm (the full LSMO bridge area) in the images presented in Figures 2 and 3 for the two bridge widths W = 50 μm and W = 100 μm.

Image of FIG. 5.
FIG. 5.

Time dependence of the normalized magnetization during reversal in the 100 μm wide LSMO bridge when (a) H is applied parallel or (b) perpendicular to the bridge length. The different curves were obtained by recording the MOKE images every 22 s, after the sample has been saturated and placed at a fixed magnetic field (indicated in the legends) and by averaging the intensity over the same 100 μm × 500 μm rectangle as used for the hysteresis loops. Corresponding MOKE images are shown.

Image of FIG. 6.
FIG. 6.

Magnetoresistance versus magnetic field characteristics at room temperature measured in (a) the 50 μm and (b) the 100 μm wide LSMO bridges when the field is applied parallel or perpendicular to the bridge length.

Tables

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Table I.

Literature data reporting measured values of LFMR in LSMO single layers of various structural properties. Most of the values are estimated from graphical data in cited papers.

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/content/aip/journal/jap/112/1/10.1063/1.4730966
2012-07-05
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Direct observation of magnetization reversal and low field magnetoresistance of epitaxial La0.7Sr0.3MnO3/SrTiO3 (001) thin films at room temperature
http://aip.metastore.ingenta.com/content/aip/journal/jap/112/1/10.1063/1.4730966
10.1063/1.4730966
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