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Magnetic proximity effect in Pr0.5Ca0.5MnO3/La0.7Sr0.3MnO3 bilayered films
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10.1063/1.3677235
/content/aip/journal/ltp/38/1/10.1063/1.3677235
http://aip.metastore.ingenta.com/content/aip/journal/ltp/38/1/10.1063/1.3677235
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Low-magnification cross-sectional HREM image for the PCMO/LSMO bilayer. (a) The (002) Bragg peaks for the PCMO and LSMO films and the PCMO/LSMO bilayer. (b) The FFT pattern for the PCMO/LSMO interface.

Image of FIG. 2.
FIG. 2.

Temperature dependences of the in-plane FC (solid symbols) and ZFC (hollow symbols) magnetic moment for the PCMO film measured at H, T: 0.01 (1), 0.1 (2), 0.5 (3), and 1 (4). The inset presents temperature dependences of the inverse dc susceptibility for the same film. The solid line is the linear fit within the Curie–Weiss model.

Image of FIG. 3.
FIG. 3.

The in-plane hysteresis loops for the PCMO film measured at T, K: 10 (1) and 200 (2). Straight lines are the linear extrapolation of the AFM term. The insets show the same curves in detail. Lines are a guide to the eyes.

Image of FIG. 4.
FIG. 4.

Temperature dependences of the in-plane FC (solid symbols) and ZFC (hollow symbols) magnetic moment for the PCMO/LSMO bilayer measured at H, T: 0.01 (1), 0.1 (2), 0.5 (3), and 1 (4). The inset presents the same dependences for the LSMO film. Lines are a guide to the eyes.

Image of FIG. 5.
FIG. 5.

The in-plane hysteresis loops for the PCMO/LSMO bilayer measured at T, K: 10 (1) and 200 (2). Lines are a guide to the eyes. Straight lines are the linear extrapolation of the AFM term. Inset (a) presents the hysteresis loop for the PCMO film (solid symbols) and the PCMO sublayer (hollow symbols), extracted from the total M(T) for the PCMO/LSMO bilayer (see text). Inset (b) shows the hysteresis loops for the LSMO film taken at T, K: 10 (1) and 200 K (2).

Image of FIG. 6.
FIG. 6.

In-plane hysteresis loops for the PCMO/LSMO bilayer at T = 10 K measured after cooling without (ZFC regime, solid symbols) and with (FC regime, hollow symbols) an applied magnetic field of 0.5 T. Insets (a) and (b) present the same curves in detail. Lines are a guide to the eyes. The asymmetric shape of the hysteresis loop represented by the inset (b) testifies to the appearance of the exchange bias interaction.

Image of FIG. 7.
FIG. 7.

Temperature dependences of resistance for the PCMO film (1) and the PCMO/LSMO bilayer (2) measured without (solid symbols) and with (hollow symbols) an applied magnetic field of 5 T. Lines are a guide to the eyes. Inset (a) presents the ln(R/T) – vs. – T −1 plot for the same samples in the absence of applied magnetic field. Lines are a guide to the eyes. Inset (b) displays the temperature-dependent MR ratio for the same samples. Solid lines represent theoretical curves obtained within the framework of the magnetic polaron model.

Image of FIG. 8.
FIG. 8.

Temperature dependences of the in-plane FC (solid symbols) and the ZFC (hollow symbols) magnetic moment for the PCMO film (circles) and the PCMO sublayer (squares) taken at different applied magnetic fields.

Image of FIG. 9.
FIG. 9.

Temperature dependences of the inverse dc susceptibilityχ−1 for the PCMO sublayer measured at H, T: 0.01 (1), 0.1 (2), and 1 (3). The solid lines are the linear fit within the Curie–Weiss model. The inset shows the same curve at H = 0.01 T. The solid line is the Bloch’s curve for the FM state.

Image of FIG. 10.
FIG. 10.

The ln(R/T) – vs. – T −1 plots for the PCMO film (1) and the PCMO/LSMO bilayer (2) measured without (solid symbols) and with (hollow symbols) an applied magnetic field. (a) Solid lines are the corresponding theoretical curves obtained within the framework of the magnetic polaron model. Magnetic field dependences of T * extracted from the peak in the ZFC M(T) curve for the PCMO film (1) and the PCMO/LSMO bilayer (2). (b) Solid and dashed lines are the theoretical curves obtained within the framework of the spin-glass-like and the interacting SPMs models, respectively.

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/content/aip/journal/ltp/38/1/10.1063/1.3677235
2012-02-02
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Magnetic proximity effect in Pr0.5Ca0.5MnO3/La0.7Sr0.3MnO3 bilayered films
http://aip.metastore.ingenta.com/content/aip/journal/ltp/38/1/10.1063/1.3677235
10.1063/1.3677235
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