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Modulation of persistent photoconductivity by electric-field-controlled strain in thin films of La0.39Pr0.24Ca0.37MnO3
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10.1063/1.4793534
/content/aip/journal/apl/102/7/10.1063/1.4793534
http://aip.metastore.ingenta.com/content/aip/journal/apl/102/7/10.1063/1.4793534
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

A typical X-ray diffraction pattern for LPCMO film (t = 90 nm) on PMN-PT. Shown in the inset is a schematic diagram of measurement circuit.

Image of FIG. 2.
FIG. 2.

(a) and (b) R(T) curves for LPCMO films on PMN-PT [(a) t = 90 nm and (b) t = 120 nm] under different bias voltages [from 500 V (10 kV/cm) to 0 V (0 kV/cm), the interval is 125 V (2.5 kV/cm)]. (c) and (d) Temperature dependences of resistance modulation, |ΔR|10 kV/cm/R = |[R(10 kV/cm) − R(0)]|/R(0) for LPCMO films [(c) t = 90 nm and (d) t = 120 nm].

Image of FIG. 3.
FIG. 3.

(a) and (b) In situ XRD patterns in the vicinity of (002) reflections for PMN-PT substrate (LPCMO90 sample) (a) and LPCMO90 film (b) under different electric fields [from 500 V (10 kV/cm) to 0 V (0 kV/cm), the interval is 125 V (2.5 kV/cm)]. (c)and (d) Electric field dependence of out-of-plane lattice constant c (c) and its relative change Δc/c (d) of both films and substrates for LPCMO90 and LPCMO120.

Image of FIG. 4.
FIG. 4.

Resistance versus illumination time for LPCMO on PMN-PT (t = 90 nm, voltage across PMN-PT = 0 V, T = 15 K, I = 10 μA). (b) Differential Resistance as a function of current and voltage vs current (inset) curves before (dark) and after (red) light illumination for LPCMO on PMN-PT (t = 90 nm, voltage across PMN-PT = 0 V, T = 15 K). (c) Temperature dependence of PPC (illumination duration = 1 h) for LPCMO on PMN-PT (t = 90 nm, VPMN-PT = 0 V). (d) Comparison of R(T) curves during the warming process measured in dark (t = 120 nm and I = 10 μA). Two of them were measured with VPMN-PT = 0 V: the thin lines (0VNL) are recorded without light illumination and the thick red line (0VAL) is measured after illumination for 1 h at 15 K. The third (shown with green thin line, denoted as 500VNL) is the R(T) curve under 500 V bias (VPMN-PT = 500 V, E = 10 kV/cm).

Image of FIG. 5.
FIG. 5.

PPC (illumination duration = 1 h) at 15 K for LPCMO films on PMN-PT [(a) t = 90 nm and (b) t = 120 nm] under different bias voltages [from 500 V (10 kV/cm) to 0 V (0 kV/cm), and the interval is 125 V (2.5 kV/cm)].

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/content/aip/journal/apl/102/7/10.1063/1.4793534
2013-02-22
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Modulation of persistent photoconductivity by electric-field-controlled strain in thin films of La0.39Pr0.24Ca0.37MnO3
http://aip.metastore.ingenta.com/content/aip/journal/apl/102/7/10.1063/1.4793534
10.1063/1.4793534
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