Investigation of dark and light conductivities in calcium doped bismuth ferrite thin films

被引：21

作者：

Kianinia, M. ^{[1
]}

Ahadi, K. ^{[1
]}

Nemati, A. ^{[1
]}

机构：

[1] Sharif Univ Technol, Dept Mat & Sci Engn, Tehran, Iran

来源：

MATERIALS LETTERS | 2011年 / 65卷 / 19-20期

关键词：

Ca doped BiFeO3; Electrical properties; Structural analyses; Thin films;

D O I：

10.1016/j.matlet.2011.06.052

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Electrical conductivities in dark and light were investigated in Calcium doped Bismuth Ferrite thin films. Higher dark conductivity, in the order of 10 times higher than conductivity of bismuth ferrite, was observed for Bi0.85Ca0.15FeO3-delta. Structural analyses using Rietveld refinement showed a deviation from volume reduction for Bi0.85Ca0.15FeO3-delta which could be the reason of abnormally high conductivity for this compound. Although higher calcium doping reduced conductivity, photoconductivity was observed again. Atomic Force Microscopy investigations showed that surface roughness and grain size decreased with increasing calcium concentration. Enhanced photoconductivity is reported for Bi0.7Ca0.3FeO3-delta with similar to 2.8 eV direct optical band gap at 300 K with surface roughness of similar to 2 nm. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：3086 / 3088

页数：3

共 14 条

[1] Photoconductivity and diode effect in Bi rich multiferroic BiFeO3 thin films grown by pulsed-laser deposition [J].

Ahadi, K. ;

Mahdavi, S. M. ;

Nemati, A. ;

Kianinia, M. .

JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS, 2011, 22 (07) :815-820

[2] Photoconductivity in BiFeO3 thin films [J].

Basu, S. R. ;

Martin, L. W. ;

Chu, Y. H. ;

Gajek, M. ;

Ramesh, R. ;

Rai, R. C. ;

Xu, X. ;

Musfeldt, J. L. .

APPLIED PHYSICS LETTERS, 2008, 92 (09)

[3] Physics and Applications of Bismuth Ferrite [J].

Catalan, Gustau ;

Scott, James F. .

ADVANCED MATERIALS, 2009, 21 (24) :2463-2485

[4] Band gap and Schottky barrier heights of multiferroic BiFeO3 [J].

Clark, S. J. ;

Robertson, J. .

APPLIED PHYSICS LETTERS, 2007, 90 (13)

[5] Nanocrystalline and highly resistive bismuth ferric oxide thin films by a simple chemical method [J].

Gujar, T. P. ;

Shinde, V. R. ;

Lokhande, C. D. .

MATERIALS CHEMISTRY AND PHYSICS, 2007, 103 (01) :142-146

[6] Doping strategies for increased performance in BiFeO3 [J].

Khomchenko, V. A. ;

Kiselev, D. A. ;

Kopcewicz, M. ;

Maglione, M. ;

Shvartsman, V. V. ;

Borisov, P. ;

Kleemann, W. ;

Lopes, A. M. L. ;

Pogorelov, Y. G. ;

Araujo, J. P. ;

Rubinger, R. M. ;

Sobolev, N. A. ;

Vieira, J. M. ;

Kholkin, A. L. .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2009, 321 (11) :1692-1698

[7] Room-temperature coexistence of large electric polarization and magnetic order in BiFeO3 single crystals [J].

Lebeugle, D. ;

Colson, D. ;

Forget, A. ;

Viret, M. ;

Bonville, P. ;

Marucco, J. F. ;

Fusil, S. .

PHYSICAL REVIEW B, 2007, 76 (02)

[8] ATOMIC STRUCTURE OF BIFEO3 [J].

MICHEL, C ;

MOREAU, JM ;

ACHENBAC.GD ;

GERSON, R ;

JAMES, WJ .

SOLID STATE COMMUNICATIONS, 1969, 7 (09) :701-&

[9] First-principles study of spontaneous polarization in multiferroic BiFeO3 -: art. no. 014113 [J].

Neaton, JB ;

Ederer, C ;

Waghmare, UV ;

Spaldin, NA ;

Rabe, KM .

PHYSICAL REVIEW B, 2005, 71 (01)

[10] β phase and γ-β metal-insulator transition in multiferroic BiFeO3 [J].

Palai, R. ;

Katiyar, R. S. ;

Schmid, H. ;

Tissot, P. ;

Clark, S. J. ;

Robertson, J. ;

Redfern, S. A. T. ;

Catalan, G. ;

Scott, J. F. .

PHYSICAL REVIEW B, 2008, 77 (01)

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