Pulse length and amplitude dependent resistive switching mechanisms in Pt-Pr0.67Ca0.33MnO3-Pt sandwich structures
We report here on the presence of two different nonvolatile resistive switching mechanisms in Pt-Pr _0.67 Ca _0.33 MnO _3 -Pt sandwich structures based on pulsed electrical transport measurements. As a function of pulse length, amplitude and temperature, the devices show two different switching regi...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2015-01-01
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| Series: | New Journal of Physics |
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| Online Access: | https://doi.org/10.1088/1367-2630/17/3/033011 |
| _version_ | 1797751198544035840 |
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| author | M Scherff B Meyer J Hoffmann C Jooss M Feuchter M Kamlah |
| author_facet | M Scherff B Meyer J Hoffmann C Jooss M Feuchter M Kamlah |
| author_sort | M Scherff |
| collection | DOAJ |
| description | We report here on the presence of two different nonvolatile resistive switching mechanisms in Pt-Pr _0.67 Ca _0.33 MnO _3 -Pt sandwich structures based on pulsed electrical transport measurements. As a function of pulse length, amplitude and temperature, the devices show two different switching regimes. The first is positive switching (PS) where a high resistance state (HRS) evolves at positive bias at the top electrode in the voltage range of U ≈ 0.5–1.2 V and pulse lengths t _p ≈ 10 ^−7 s. In addition, we observe a cross over to negative switching (NS) for U > 1 V and t _p ≈ 10 ^−3 s. Here, the HRS evolves at negative bias applied at the top electrode. We present strong evidence that both switching mechanisms take place at the interface between Pr _0.67 Ca _0.33 MnO _3 and the top electrode. Based on finite element simulations of the temperature evolution during the electrical pulses, we show that the onset of Joule heating is characteristic of the PS regime, whereas drastic temperature increases of several hundred Kelvin evolve during NS. Based on the observed different timescales, pulse amplitudes and temperature dependences of PS and NS, respectively, we suggest that two different switching mechanisms are involved: a fast, short range exchange of oxygen at the interface with the metallic electrode for PS and a slower, long range redistribution of oxygen in the entire PCMO film for the NS. |
| first_indexed | 2024-03-12T16:45:02Z |
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| id | doaj.art-f115b0f7efd84770a97a11aa7aab2e01 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:45:02Z |
| publishDate | 2015-01-01 |
| publisher | IOP Publishing |
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| series | New Journal of Physics |
| spelling | doaj.art-f115b0f7efd84770a97a11aa7aab2e012023-08-08T14:19:13ZengIOP PublishingNew Journal of Physics1367-26302015-01-0117303301110.1088/1367-2630/17/3/033011Pulse length and amplitude dependent resistive switching mechanisms in Pt-Pr0.67Ca0.33MnO3-Pt sandwich structuresM Scherff0B Meyer1J Hoffmann2C Jooss3M Feuchter4M Kamlah5Institute of Materials Physics, University of Goettingen , D-37077 Goettingen, GermanyInstitute of Materials Physics, University of Goettingen , D-37077 Goettingen, GermanyInstitute of Materials Physics, University of Goettingen , D-37077 Goettingen, GermanyInstitute of Materials Physics, University of Goettingen , D-37077 Goettingen, GermanyKarlsruhe Institute of Technology (KIT), Institute for Applied Materials (IAM), Hermann-von-Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, GermanyKarlsruhe Institute of Technology (KIT), Institute for Applied Materials (IAM), Hermann-von-Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, GermanyWe report here on the presence of two different nonvolatile resistive switching mechanisms in Pt-Pr _0.67 Ca _0.33 MnO _3 -Pt sandwich structures based on pulsed electrical transport measurements. As a function of pulse length, amplitude and temperature, the devices show two different switching regimes. The first is positive switching (PS) where a high resistance state (HRS) evolves at positive bias at the top electrode in the voltage range of U ≈ 0.5–1.2 V and pulse lengths t _p ≈ 10 ^−7 s. In addition, we observe a cross over to negative switching (NS) for U > 1 V and t _p ≈ 10 ^−3 s. Here, the HRS evolves at negative bias applied at the top electrode. We present strong evidence that both switching mechanisms take place at the interface between Pr _0.67 Ca _0.33 MnO _3 and the top electrode. Based on finite element simulations of the temperature evolution during the electrical pulses, we show that the onset of Joule heating is characteristic of the PS regime, whereas drastic temperature increases of several hundred Kelvin evolve during NS. Based on the observed different timescales, pulse amplitudes and temperature dependences of PS and NS, respectively, we suggest that two different switching mechanisms are involved: a fast, short range exchange of oxygen at the interface with the metallic electrode for PS and a slower, long range redistribution of oxygen in the entire PCMO film for the NS.https://doi.org/10.1088/1367-2630/17/3/033011resistive switchingPCMOoxygen diffusionJoule heatingfinite element simulationelectrode oxidation |
| spellingShingle | M Scherff B Meyer J Hoffmann C Jooss M Feuchter M Kamlah Pulse length and amplitude dependent resistive switching mechanisms in Pt-Pr0.67Ca0.33MnO3-Pt sandwich structures New Journal of Physics resistive switching PCMO oxygen diffusion Joule heating finite element simulation electrode oxidation |
| title | Pulse length and amplitude dependent resistive switching mechanisms in Pt-Pr0.67Ca0.33MnO3-Pt sandwich structures |
| title_full | Pulse length and amplitude dependent resistive switching mechanisms in Pt-Pr0.67Ca0.33MnO3-Pt sandwich structures |
| title_fullStr | Pulse length and amplitude dependent resistive switching mechanisms in Pt-Pr0.67Ca0.33MnO3-Pt sandwich structures |
| title_full_unstemmed | Pulse length and amplitude dependent resistive switching mechanisms in Pt-Pr0.67Ca0.33MnO3-Pt sandwich structures |
| title_short | Pulse length and amplitude dependent resistive switching mechanisms in Pt-Pr0.67Ca0.33MnO3-Pt sandwich structures |
| title_sort | pulse length and amplitude dependent resistive switching mechanisms in pt pr0 67ca0 33mno3 pt sandwich structures |
| topic | resistive switching PCMO oxygen diffusion Joule heating finite element simulation electrode oxidation |
| url | https://doi.org/10.1088/1367-2630/17/3/033011 |
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