Electroresistance of Electrically Nonhomogeneous La0.67Ca0.33MnO3/MgO Thin Films

Kiprijanovič, O.; Lučun, Andžej; Ašmontas, Steponas; Anisimovas, F.; Butkutė, Renata; Maneikis, Andrius; Sužiedėlis, Algirdas; Vengalis, B.

doi:10.12693/aphyspola.111.141

Cited by 4 publications

(7 citation statements)

References 9 publications

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“…This is due to 9 % mismatch of lattice constants of a pseudo cubic single phased La 0.67 Ca 0.33 MnO 3 and MgO (100) face. The surface of the cleaved substrates was investigated by atomic force microscopy [2]. Terracelike structures with a step height typically from 5 nm to 25 nm were revealed.…”

Section: Methodsmentioning

confidence: 99%

“…Significant place amongst novel materials belongs to materials with properties modified at nanostructural and mesoscopic levels by fast intensive energy influence. That influence could be realized by power laser illumination [1], high voltage electric pulses [2] and shock waves [3].…”

Section: Introduction *mentioning

confidence: 99%

“…Investigations of the nonhomogeneous La 0.67 Ca 0.33 MnO 3 thin films grown by PLD on cleaved MgO substrates have shown that high voltage nanosecond pulses applied to the films at 80 K temperature can irreversibly change the film resistance, causing appearance of HR states (comparing with initial state) [2]. The effect of local film heating induced by the series of the pulses which create high electric field strength was interpreted as a pulsed thermocycling.…”

Section: Introduction *mentioning

confidence: 99%

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Modification of Electrical Properties of Thin La0.67Ca0.33MnO3 Films by Pulsed Thermocycling

Anisimovas

Ašmontas

Gradauskas

et al. 2012

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Highly resistive states were formed in nonhomogeneous thin La_0.67Ca_0.33MnO₃ films at 80 K temperature after resistance switching induced by the pulsed thermocycling. Heating up to room temperature does not destroy the resistive states. They demonstrate high values of electroresistance at applied pulsed electric field. It was registered formation of novel highly resistive state by resistance switching at 130 K in T_m region. We suppose that local temperature increase in the film is responsible for the formation of the resistive states in both cases and present a plausible explanation of the obtained results. The method of cyclic nanosecond temperature increase and decrease can be useful for modification of material properties having strongly correlated electron system and of ferroelectrics. Questions of practical realization of proposed method are discussed.

DOI: http://dx.doi.org/10.5755/j01.ms.18.3.2427

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Section: Methodsmentioning

confidence: 99%

Section: Introduction *mentioning

confidence: 99%

Section: Introduction *mentioning

confidence: 99%

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Modification of Electrical Properties of Thin La0.67Ca0.33MnO3 Films by Pulsed Thermocycling

Anisimovas

Ašmontas

Gradauskas

et al. 2012

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DOI: http://dx.doi.org/10.5755/j01.ms.18.3.2427

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“…The X-ray diffraction measurements demonstrated that so prepared films were single-phased and of pseudocubic perovskite structure and that the films on MgO (100) substrate were polycrystalline. Large dc resistance show polycrystalline character of the used films [1,5,6], too. The film surface was examined by atomic force microscope.…”

Section: Experimental Investigations and Theoretical Modelmentioning

confidence: 96%

Response of Granular La1− xCaxMnO3 Film to 10 GHz and 35 GHz Frequency Electromagnetic Radiation

Repšas¹,

Laurinavičius²,

Vaškevičius³

et al. 2008

Int J Infrared Milli Waves

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The nonbolometric response of La 1−x Ca x MnO 3 film to 10 GHz and 35 GHz frequency electromagnetic radiation is investigated in the case when, in addition to the strong electric field of the wave, the film is subjected to a stationary electric bias field. Dependences of responses on the radiation power P at temperature T = 80 K are presented. In the low power region, a linear dependence of the response on P is observed at both frequencies whereas for high powers the dependence behaves as ∼ P 1/2 . The obtained results are explained taking into account that the nonbolometric response originates from the intergranular junctions that operate in the reverse current regime. There two effects take place: (i) at low powers the detection resistance decreases with increasing power P, and (ii) at higher powers in addition to that the film resistance decreases as P 1/2 due to the avalanche of charge carriers in the electric field of the electromagnetic wave.

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“…The film deposition procedure and investigation of the properties of the electrically nonhomogeneous films were described in Ref. [4]. The prepared films demonstrated the PM-FM transition in the temperature range 125-140 K. A pair of Ag pads (width w = 1 mm and the gap between them d = 10 ÷ 30 µm) magnetron sputtered onto the film surface through a mask served as electrodes for electrical measurements.…”

Section: Preparation Of High Resistive Samples and Experimental Setupmentioning

confidence: 99%

Reversible Resistive Switching in Electrically Nonhomogeneous La_0.67Ca_0.33MnO₃Thin Films by Short Electrical Pulses

Lučun¹,

Kiprijanovič²,

Ašmontas³

et al. 2008

Acta Phys. Pol. A

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Resistance changes in thin electrically nonhomogeneous La 0.67 Ca 0.33 MnO 3 films were investigated using electrical pulses of nanosecond duration in the 80-300 K temperature range. Two types of reversible switching to higher resistive states with different starting temperature induced by series of the positive pulses were observed. Possible mechanisms of the resistance switching by short electrical pulses in the vicinity of Tm and at 80-90 K are discussed.

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Electroresistance of Electrically Nonhomogeneous La_0.67Ca_0.33MnO₃/MgO Thin Films

Cited by 4 publications

References 9 publications

Modification of Electrical Properties of Thin La0.67Ca0.33MnO3 Films by Pulsed Thermocycling

Modification of Electrical Properties of Thin La0.67Ca0.33MnO3 Films by Pulsed Thermocycling

Response of Granular La1− xCaxMnO3 Film to 10 GHz and 35 GHz Frequency Electromagnetic Radiation

Reversible Resistive Switching in Electrically Nonhomogeneous La_0.67Ca_0.33MnO₃Thin Films by Short Electrical Pulses

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Electroresistance of Electrically Nonhomogeneous La0.67Ca0.33MnO3/MgO Thin Films

Cited by 4 publications

References 9 publications

Modification of Electrical Properties of Thin La0.67Ca0.33MnO3 Films by Pulsed Thermocycling

Modification of Electrical Properties of Thin La0.67Ca0.33MnO3 Films by Pulsed Thermocycling

Response of Granular La1− xCaxMnO3 Film to 10 GHz and 35 GHz Frequency Electromagnetic Radiation

Reversible Resistive Switching in Electrically Nonhomogeneous La0.67Ca0.33MnO3Thin Films by Short Electrical Pulses

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Electroresistance of Electrically Nonhomogeneous La_0.67Ca_0.33MnO₃/MgO Thin Films

Reversible Resistive Switching in Electrically Nonhomogeneous La_0.67Ca_0.33MnO₃Thin Films by Short Electrical Pulses