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Exploiting phase separation in monolithic La0.6Ca0.4MnO3 devices
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10.1063/1.4818314
/content/aip/journal/apl/103/6/10.1063/1.4818314
http://aip.metastore.ingenta.com/content/aip/journal/apl/103/6/10.1063/1.4818314
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

For two of the mesa devices described in Fig. 2 [5 m × 5 m (solid circles), 6 m × 6 m (open squares)], we show changes in high-field CPP resistance-area product Δ = () − (0) after zero-field cooling to 25 K. Left inset: device schematic for La CaMnO (LCMO), not to scale, showing contact pads (thick lines) for voltage and current connections. Right inset: equivalent data for the 5 m × 5 m mesa when LCMO40 is replaced by LCMO30.

Image of FIG. 2.
FIG. 2.

Low-field changes in CPP resistance-area product Δ() (0), for devices comprising square mesas of side lengths 5–18 m. These mesas were defined in an 80 nm film of LCMO40 and measured in  = ±0.4 T after zero-field cooling to 25 K. Right inset: equivalent data for the 5 m × 5 m mesa when LCMO40 is replaced by LCMO30.

Image of FIG. 3.
FIG. 3.

Schematic (not to scale) of an LCMO40 mesa device in (a) antiparallel and (b) parallel mesa-track configurations. For each FMM island in the PMI background, magnetization direction is indicated by arrow direction and colour. Domain walls (dotted lines) in FMM regions do not span the entire mesa, which is thus weakly coupled to the underlying track.

Image of FIG. 4.
FIG. 4.

For the 6 m × 6 m mesa device described in Fig. 2 , we show low-field changes in CPP resistance-area product Δ() (0) at selected temperatures, after zero-field cooling from 300 K to the measurement temperature. Data measured in  = ±0.4 T.

Image of FIG. 5.
FIG. 5.

For the 5 m × 5 m LCMO40 mesa device described in Figure 2 , we show low-field changes in CPP resistance-area product Δ() (0). Each of the three major loops was measured in the order shown, byfirst zero-field cooling to 25 K, and then sweeping the applied field in  = ±0.4 T. After zero-field cooling to 25 K for a fourth time, we measured part of a major loop and then measured a minor loop in  = ±35 mT.

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/content/aip/journal/apl/103/6/10.1063/1.4818314
2013-08-09
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Exploiting phase separation in monolithic La0.6Ca0.4MnO3 devices
http://aip.metastore.ingenta.com/content/aip/journal/apl/103/6/10.1063/1.4818314
10.1063/1.4818314
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