Article: Anomalous temperature and magnetic field dependences of current–voltage characteristics in Pr0.6Ca0.4MnO3/Nb-doped SrTiO3 heterojunctions
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- Publisher Website: 10.1088/0022-3727/43/17/175003
- Scopus: eid_2-s2.0-77951090031
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| Title | Anomalous temperature and magnetic field dependences of current–voltage characteristics in Pr0.6Ca0.4MnO3/Nb-doped SrTiO3 heterojunctions | ||||||
|---|---|---|---|---|---|---|---|
| Authors | Luo, Z1 Gao, J1 | ||||||
| Keywords | Condensed matter: electrical, magnetic and optical Surfaces, interfaces and thin films | ||||||
| Issue Date | 2010 | ||||||
| Publisher | Institute of Physics Publishing. The Journal's web site is located at http://www.iop.org/Journals/jpd | ||||||
| Citation | Journal of Physics D: Applied Physics, 2010, v. 43 n. 17, article no. 175003 [How to Cite?] DOI: http://dx.doi.org/10.1088/0022-3727/43/17/175003 | ||||||
| Abstract | The effect of a magnetic field on the current–voltage characteristics of Pr0.6Ca0.4MnO3/Nb-doped SrTiO3 heterojunctions was studied. An abnormal increase in diffusion voltage, break down voltage and ideality factor was observed at a low temperature. It was also found that the transport properties of these heterojunctions could be considerably influenced by external magnetic fields. When a magnetic field was applied, I–V curves were shifted to a lower bias voltage. Both ideality factor and saturation current were affected by the magnetic field. The magnetic field modulation was more significant at lower temperatures. The analysis showed that the current–voltage relation was dominated by tunnelling. The anomaly at low temperatures may be a result of temperature and electric field dependence of the dielectric constant of Nb : SrTiO3. A magnetic field may also modify the work function and density of states of Pr0.6Ca0.4MnO3, leading to a change in current–voltage characteristics. | ||||||
| ISSN | 0022-3727 2011 Impact Factor: 2.544 2011 SCImago Journal Rankings: 0.128 | ||||||
| DOI | http://dx.doi.org/10.1088/0022-3727/43/17/175003 | ||||||
| ISI Accession Number ID | WOS:000276704200003
Funding Information: This work has been supported by the Research Grant Council of Hong Kong ( Project No HKU 7025/06P) and the Seed Funding of the University of Hong Kong. | ||||||
| Grants | Opto-electric response in heteroepitaxial junctions composed of transition metal perovskites |
| dc.contributor.author | Luo, Z | ||||||
|---|---|---|---|---|---|---|---|
| dc.contributor.author | Gao, J | ||||||
| dc.date.accessioned | 2010-10-31T11:22:12Z | ||||||
| dc.date.available | 2010-10-31T11:22:12Z | ||||||
| dc.date.issued | 2010 | ||||||
| dc.description.abstract | The effect of a magnetic field on the current–voltage characteristics of Pr0.6Ca0.4MnO3/Nb-doped SrTiO3 heterojunctions was studied. An abnormal increase in diffusion voltage, break down voltage and ideality factor was observed at a low temperature. It was also found that the transport properties of these heterojunctions could be considerably influenced by external magnetic fields. When a magnetic field was applied, I–V curves were shifted to a lower bias voltage. Both ideality factor and saturation current were affected by the magnetic field. The magnetic field modulation was more significant at lower temperatures. The analysis showed that the current–voltage relation was dominated by tunnelling. The anomaly at low temperatures may be a result of temperature and electric field dependence of the dielectric constant of Nb : SrTiO3. A magnetic field may also modify the work function and density of states of Pr0.6Ca0.4MnO3, leading to a change in current–voltage characteristics. | ||||||
| dc.description.grant | Opto-electric response in heteroepitaxial junctions composed of transition metal perovskites | ||||||
| dc.description.grantcode | 82625 | ||||||
| dc.description.nature | Link_to_subscribed_fulltext | ||||||
| dc.identifier.citation | Journal of Physics D: Applied Physics, 2010, v. 43 n. 17, article no. 175003 [How to Cite?] DOI: http://dx.doi.org/10.1088/0022-3727/43/17/175003 | ||||||
| dc.identifier.doi | http://dx.doi.org/10.1088/0022-3727/43/17/175003 | ||||||
| dc.identifier.hkuros | 181539 | ||||||
| dc.identifier.isi | WOS:000276704200003
Funding Information: This work has been supported by the Research Grant Council of Hong Kong ( Project No HKU 7025/06P) and the Seed Funding of the University of Hong Kong. | ||||||
| dc.identifier.issn | 0022-3727 2011 Impact Factor: 2.544 2011 SCImago Journal Rankings: 0.128 | ||||||
| dc.identifier.issue | 17, article no. 175003 | ||||||
| dc.identifier.openurl | | ||||||
| dc.identifier.scopus | eid_2-s2.0-77951090031 | ||||||
| dc.identifier.uri | http://hdl.handle.net/10722/125284 | ||||||
| dc.identifier.volume | 43 | ||||||
| dc.language | eng | ||||||
| dc.publisher | Institute of Physics Publishing. The Journal's web site is located at http://www.iop.org/Journals/jpd | ||||||
| dc.relation.ispartof | Journal of Physics D: Applied Physics | ||||||
| dc.rights | Journal of Physics D: Applied Physics. Copyright © Institute of Physics Publishing. | ||||||
| dc.subject | Condensed matter: electrical, magnetic and optical | ||||||
| dc.subject | Surfaces, interfaces and thin films | ||||||
| dc.title | Anomalous temperature and magnetic field dependences of current–voltage characteristics in Pr0.6Ca0.4MnO3/Nb-doped SrTiO3 heterojunctions | ||||||
| dc.type | Article |
Author Affiliations
- The University of Hong Kong