TITLE

Rectifying and photovoltaic properties of the heterojunction composed of CaMnO3 and Nb-doped SrTiO3

AUTHOR(S)
Sun, J. R.; Zhang, S. Y.; Shen, B. G.; Wong, H. K.
PUB. DATE
January 2005
SOURCE
Applied Physics Letters;1/31/2005, Vol. 86 Issue 5, p053503
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A heterojunction composed of CaMnO3 (CMO) and Nb-doped SrTiO3 (STON) was fabricated and its properties were studied and compared with La0.67Ca0.33MnO3/STON and LaMnO3+δ/STON p-n, junctions. This CMO/STON junction exhibits an asymmetric current–voltage relation similar to a p-n junction. The most remarkable discovery is that the magnetic state of the manganites has a strong impact on the rectifying behaviors. The diffusion voltage, which is the critical voltage for the current rush, shows a tendency to decrease/increase with the establishment of the antiferromagnetic/ferromagnetic order in the manganites of the junction. Similar to other manganite p-n junctions, CMO/STON also exhibits a significant photovoltaic effect, and the maximum photovoltage is ∼2.2 mV under the illumination of ∼7 mW light (λ=460 nm). A qualitative explanation is given based on an analysis on the band diagram of the junctions.
ACCESSION #
16345365

 

Related Articles

  • Positive and negative exchange bias effects in the simple perovskite manganite NdMnO3. Hong, Fang; Cheng, Zhenxiang; Wang, Jianli; Wang, Xiaolin; Dou, Shixue // Applied Physics Letters;9/3/2012, Vol. 101 Issue 10, p102411 

    Exchange bias effects were studied in the simple perovskite NdMnO3. Nd3+ ordering is induced by the Mn3+ ferromagnetic component, and they are antiferromagnetically coupled with each other. At 30 K, both negative and positive exchange bias effects are found, which are dependent on the cooling...

  • Double-peaked character of the temperature dependence of resistance of perovskite manganites for... Tovstolytkin, A.I.; Pogorilyi, A.N.; Kovtun, S.M. // Low Temperature Physics;Dec99, Vol. 25 Issue 12, p962 

    Examines the double-peaked character of the temperature dependence of resistance of perovskite manganites for a broadened ferromagnetic transition. Decrease in the paramagnetic phase fraction according to an exponential law; Evolution of the temperature variation of the resulting resistance as...

  • Magnetocaloric Effect of Perovskite Manganites CeSrMnO. Hamad, Mahmoud // Journal of Superconductivity & Novel Magnetism;Sep2013, Vol. 26 Issue 9, p2981 

    Magnetocaloric properties of the CeSrMnO system near a phase transition from a ferromagnetic to a paramagnetic state are investigated. The value of the magnetocaloric effect has been determined from the calculation of magnetization as a function of temperature under different external magnetic...

  • Magnetic Interactions in Transition Metal Oxides with Orbital Degrees of Freedom. Oleś, Nadrzej M. // AIP Conference Proceedings;2003, Vol. 695 Issue 1, p176 

    We review the frustrated magnetic interactions in spin-orbital models which describe superexchange in transition metal oxides with orbital degeneracy, and analyze the reasons for the symmetry breaking in cubic perovskites. The superexchange in eg systems is dominated by orbital interactions...

  • Pressure Sensitivity of the Ferromagnetic Transition in Perovskite Manganites Revisited. Garbarino, G.; Acha, C.; Polla, G.; Leyva, A. G. // AIP Conference Proceedings;2006, Vol. 850 Issue 1, p1187 

    It was already shown that a qualitative understanding of the pressure effects on the ferromagnetic transition temperature (Tc) of the perovskite manganites (AMnO3) results from the variation of the geometric factors that control the bandwidth, the Mn-O-Mn bond angle and the Mn-O bond length and...

  • Buffer layer-enhanced magnetic field effect in manganite-based heterojunctions. Lü, W. M.; Sun, J. R.; Chen, Y. Z.; Shang, D. S.; Shen, B. G. // Applied Physics Letters;12/7/2009, Vol. 95 Issue 23, p232514 

    Influence of magnetic field on the rectifying property of the La0.67Ca0.33MnO3/LaMnO3/SrTiO3:0.05 wt %Nb heterojunctions has been studied. In addition to an enhanced magnetic response of the current-voltage characteristics, a field-induced increase in junction resistance, which is an effect...

  • Dynamic response in Fe-doped La0.65Ca0.35Mn1-xFexO3: Rare-earth manganites. Shah, Wiqar Hussain // Journal of Materials Research;10/28/2011, Vol. 26 Issue 20, p2599 

    We have studied the dynamic response of Fe-doped manganites with ac susceptibility measurements in La0.65Ca0.35Mn1-xFexO3 with 0.01 ≤ x ≤ 0.10 as functions of temperature and dc magnetic field. It is observed that the in-phase part of susceptibility goes through a maximum that is...

  • Anomalous Magnetic Hysteresis in La[sub 0.6]Sr[sub 0.2]Mn[sub 1.2]O[sub 3 — δ] Manganites with a Perovskite Structure. Dovgii, V. T.; Linnik, A. I.; Pashchenko, V. P.; Derkachenko, V. N.; Prokopenko, V. K.; Turchenko, V. A.; Davydeiko, N. V. // Technical Physics Letters;Jul2003, Vol. 29 Issue 7, p610 

    We have observed an anomalous magnetic hysteresis in polycrystalline (ceramic) and single crystal (film) samples of La[SUB0.6]Sr[SUB0.2]Mn[SUB1.2]O[SUB3-δ] manganites with a perovskite structure. The anomaly is explained by the coexistence and interaction of two magnetic phases (ferromagnetic...

  • Magnetic and Magnetocaloric Properties of LaPbAgMnO Compounds. Mtiraoui, N.; Dhahri, J.; Oumezine, M.; Dhahri, E. // Journal of Superconductivity & Novel Magnetism;Aug2012, Vol. 25 Issue 6, p1937 

    In this paper, we have studied the magnetic and magnetocaloric properties of the perovskite manganites LaPbAgMnO (0≤ x≤0.15), which show a sharp paramagnetic-ferromagnetic phase transition over a wide temperature range ( T=250-401 K). The Curie temperature has been analyzed by two...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics