Weak Ferroelectricity and Leakage Current Behavior of Multiferroic CoCr2O4 Nanomaterials

被引：23

作者：

Choudhary, Pankaj ^{[1
]}

Saxena, P. ^{[1
]}

Yadav, A. ^{[1
,2
]}

Sinha, A. K. ^{[3
]}

Rai, V. N. ^{[1
]}

Varshney, M. D. ^{[1
]}

Mishra, A. ^{[1
]}

机构：

[1] Devi Ahilya Univ, Sch Phys, Mat Sci Lab, Khandwa Rd Campus, Indore 452001, Madhya Pradesh, India

[2] Medi Caps Univ, Dept Phys, Indore 453331, Madhya Pradesh, India

[3] Raja Ramanna Ctr Adv Technol, Indus Synchrotron Utilizat Div, Indore 452013, Madhya Pradesh, India

来源：

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM | 2019年 / 32卷 / 08期

关键词：

Multiferroic CoCr2O4; Synchrotron x- ray diffraction; Dielectric properties; Polarization; Leakage-current behavior; DIELECTRIC-PROPERTIES; IMPROVEMENT; CONDUCTION;

D O I：

10.1007/s10948-019-5001-z

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Multiferroic CoCr2O4 is synthesized by low-temperature sol-gel auto combustion technique. High energy synchrotron x-ray diffraction pattern confirms the single-phase cubic structure with space group Fd3m. Average crystallite size (17.91nm) and negative micro-strain (9.86x10(-4)) are estimated by Williamson-Hall (W-H) plot. FTIR confirms the formation of spinel metal oxide-based cobalt chromites. The strong decrease in epsilon ' and tan delta at higher frequency can be interpreted by Maxwell-Wagner-type interfacial polarization. Weak ferroelectricity is mainly attributed to the partial reversal of polarization. J-E characteristic reveals the Ohmic (I-V) and Child's square law (I-V-2) behavior observed in CoCr2O4 nanomaterials with slope value similar to 1.04 and similar to 1.6, respectively. The conduction process for the leakage current density is interpreted using the space-charge limited current (SCLC) mechanism.

引用

页码：2639 / 2645

页数：7

共 33 条

[1] Improvement of room temperature electric polarization and ferrimagnetic properties of Co1.25Fe1.75O4 ferrite by heat treatment [J].

Bhowmik, R. N. ;

Sinha, A. K. .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2017, 421 :120-131

[2] Space-charge-limited current fluctuations in organic semiconductors [J].

Carbone, A ;

Kotowska, BK ;

Kotowski, D .

PHYSICAL REVIEW LETTERS, 2005, 95 (23)

[3] Thermally or Magnetically Induced Polarization Reversal in the Multiferroic CoCr2O4 [J].

Choi, Y. J. ;

Okamoto, J. ;

Huang, D. J. ;

Chao, K. S. ;

Lin, H. J. ;

Chen, C. T. ;

van Veenendaal, M. ;

Kaplan, T. A. ;

Cheong, S-W. .

PHYSICAL REVIEW LETTERS, 2009, 102 (06)

[4] Structural, vibrational and dielectric behavior of Co1-xMxCr2O4 (M = Zn, Mg, Cu and x=0.0, 0.5) spinel chromites [J].

Choudhary, Pankaj ;

Varshney, Dinesh .

JOURNAL OF ALLOYS AND COMPOUNDS, 2017, 725 :415-424

[5] Frequency and voltage dependent profile of dielectric properties, electric modulus and ac electrical conductivity in the PrBaCoO nanofiber capacitors [J].

Demirezen, S. ;

Kaya, A. ;

Yeriskin, S. A. ;

Balbasi, M. ;

Uslu, I. .

Results in Physics, 2016, 6 :180-185

[6] Maxwell-Wagner Polarization and Frequency-Dependent Injection at Aqueous Electrical Interfaces [J].

Desmond, Mitchell ;

Mavrogiannis, Nicholas ;

Gagnon, Zachary .

PHYSICAL REVIEW LETTERS, 2012, 109 (18)

[7]

Elakrmi E, 2012, AKADEMEIA, V2

[8] A high efficiency CoCr2O4/carbon nanotubes nanocomposite electrocatalyst for dye-sensitised solar cells [J].

Guo, Mingxing ;

Tang, Beibei ;

Zhang, Haimin ;

Yin, Shuhui ;

Jiang, Wei ;

Zhang, Yiming ;

Li, Mengying ;

Wang, Hui ;

Jiao, Liqi .

CHEMICAL COMMUNICATIONS, 2014, 50 (55) :7356-7358

[9] Catalytic activity of spinel oxides MgCr2O4 and CoCr2O4 for methane combustion [J].

Hu, Jianan ;

Zhao, Wenyan ;

Hu, Ruisheng ;

Chang, Guiying ;

Li, Chun ;

Wang, Lingjie .

MATERIALS RESEARCH BULLETIN, 2014, 57 :268-273

[10] Space charge limited conduction in CdSe thin films [J].

Kalita, PK ;

Sarma, BK ;

Das, HL .

BULLETIN OF MATERIALS SCIENCE, 2003, 26 (06) :613-617

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