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Exchange bias coupling of Co with ultrathin La2/3Sr1/3MnO3 films
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View: Figures


Image of FIG. 1.
FIG. 1.

(a) AFM micrograph of 4 u.c. LSMO, showing a clear step-and-terrace surface. The inset is RHEED intensity as a function of time for growth of 4 u.c. LSMO. (b) Temperature dependence of the magnetization of bare LSMO films with thickness of 3 u.c. and 20 u.c., respectively.

Image of FIG. 2.
FIG. 2.

Magnetic hysteresis loops measured at 5 K after ±10 kOe FC, respectively. The loops are shifted toward the opposite direction of the cooling field.

Image of FIG. 3.
FIG. 3.

Temperature dependence of the magnetization of 10 u.c. LSMO film with and without 2 nm Co capping layer, respectively. The diamagnetic contribution from SrTiO3 substrate has been subtracted. The red triangle symbols are obtained from the magnetization of 10 u.c. LSMO capped with 2 nm Co minus the magnetic contribution of Co capping layer (The magnetization of Co was measured from a Co (2 nm)/STO (001) sample.).

Image of FIG. 4.
FIG. 4.

(a) Magnetic hysteresis loops of Co (2 nm)/LSMO (2 u.c.) bilayers measured at different temperatures. The inset shows the exchange field as a function of temperature. (b) Exchange bias field HE and coercive field Hc as a function of LSMO thickness with 2 nm Co capping layer. The lines are guide to the eyes.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Exchange bias coupling of Co with ultrathin La2/3Sr1/3MnO3 films