Eutectics;
Floating zone technique;
Composites;
Magnetoelectric materials;
Magnetic materials;
MAGNETIC-PROPERTIES;
MAGNETOELECTRIC BEHAVIOR;
NANOPARTICLES;
COFE2O4;
COMBUSTION;
NIFE2O4;
OXIDE;
SIZE;
D O I:
10.1016/j.jcrysgro.2017.11.003
中图分类号:
O7 [晶体学];
学科分类号:
0702 ;
070205 ;
0703 ;
080501 ;
摘要:
Composites consisting of ferrimagnetic CoFe2O4 and ferroelectric Ba1-xSrxTiO3 were grown by the floating zone technique. The influence of Sr substitution, growth rate and atmosphere during the floating zone process were investigated. The formation of the non-ferroelectric, hexagonal modification of BaTiO3 was avoided by a slight Sr substitution of 3 mol% and the formation of BaFe12O19 was suppressed using pure nitrogen as atmosphere during the floating zone melting. These synthesis parameters led to phase-pure, but electrically conductive CoFe2O4-Ba1-xSrxTiO3 composites. A thermal treatment at 973 K in air resulted in a strong increase of the electric resistivity accompanied by a decrease of the unit-cell parameters of both components indicating the healing of oxygen defects. SEM investigations revealed a variety of different geometric structures and crack-free interfaces between both phases. The low porosities observed in the micrographs correspond with densities above 90%. Magnetoelectric (ME) measurements confirmed a coupling between the ferroic orders of both phases with a hysteresis and maximum alpha(ME) of 1.3 mV Oe(-1) cm(-1). (C) 2017 Elsevier B.V. All rights reserved.
机构:
Novgorod State Univ, Inst Elect & Informat Syst, Veliky Novgorod 173003, RussiaNovgorod State Univ, Inst Elect & Informat Syst, Veliky Novgorod 173003, Russia
Bichurin, Mirza
Petrov, Vladimir
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Novgorod State Univ, Inst Elect & Informat Syst, Veliky Novgorod 173003, RussiaNovgorod State Univ, Inst Elect & Informat Syst, Veliky Novgorod 173003, Russia
Petrov, Vladimir
Zakharov, Anatoly
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Novgorod State Univ, Inst Elect & Informat Syst, Veliky Novgorod 173003, RussiaNovgorod State Univ, Inst Elect & Informat Syst, Veliky Novgorod 173003, Russia
Zakharov, Anatoly
Kovalenko, Denis
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h-index: 0
机构:
Novgorod State Univ, Inst Elect & Informat Syst, Veliky Novgorod 173003, RussiaNovgorod State Univ, Inst Elect & Informat Syst, Veliky Novgorod 173003, Russia
Kovalenko, Denis
Yang, Su Chul
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h-index: 0
机构:
Virginia Tech, Ctr Energy Harvesting Mat & Syst, Blacksburg, VA 24061 USANovgorod State Univ, Inst Elect & Informat Syst, Veliky Novgorod 173003, Russia
Yang, Su Chul
Maurya, Deepam
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h-index: 0
机构:
Virginia Tech, Ctr Energy Harvesting Mat & Syst, Blacksburg, VA 24061 USANovgorod State Univ, Inst Elect & Informat Syst, Veliky Novgorod 173003, Russia
Maurya, Deepam
Bedekar, Vishwas
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h-index: 0
机构:
Virginia Tech, Ctr Energy Harvesting Mat & Syst, Blacksburg, VA 24061 USANovgorod State Univ, Inst Elect & Informat Syst, Veliky Novgorod 173003, Russia
Bedekar, Vishwas
Priya, Shashank
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h-index: 0
机构:
Virginia Tech, Ctr Energy Harvesting Mat & Syst, Blacksburg, VA 24061 USANovgorod State Univ, Inst Elect & Informat Syst, Veliky Novgorod 173003, Russia
机构:
Novgorod State Univ, Inst Elect & Informat Syst, Veliky Novgorod 173003, RussiaNovgorod State Univ, Inst Elect & Informat Syst, Veliky Novgorod 173003, Russia
Bichurin, Mirza
Petrov, Vladimir
论文数: 0引用数: 0
h-index: 0
机构:
Novgorod State Univ, Inst Elect & Informat Syst, Veliky Novgorod 173003, RussiaNovgorod State Univ, Inst Elect & Informat Syst, Veliky Novgorod 173003, Russia
Petrov, Vladimir
Zakharov, Anatoly
论文数: 0引用数: 0
h-index: 0
机构:
Novgorod State Univ, Inst Elect & Informat Syst, Veliky Novgorod 173003, RussiaNovgorod State Univ, Inst Elect & Informat Syst, Veliky Novgorod 173003, Russia
Zakharov, Anatoly
Kovalenko, Denis
论文数: 0引用数: 0
h-index: 0
机构:
Novgorod State Univ, Inst Elect & Informat Syst, Veliky Novgorod 173003, RussiaNovgorod State Univ, Inst Elect & Informat Syst, Veliky Novgorod 173003, Russia
Kovalenko, Denis
Yang, Su Chul
论文数: 0引用数: 0
h-index: 0
机构:
Virginia Tech, Ctr Energy Harvesting Mat & Syst, Blacksburg, VA 24061 USANovgorod State Univ, Inst Elect & Informat Syst, Veliky Novgorod 173003, Russia
Yang, Su Chul
Maurya, Deepam
论文数: 0引用数: 0
h-index: 0
机构:
Virginia Tech, Ctr Energy Harvesting Mat & Syst, Blacksburg, VA 24061 USANovgorod State Univ, Inst Elect & Informat Syst, Veliky Novgorod 173003, Russia
Maurya, Deepam
Bedekar, Vishwas
论文数: 0引用数: 0
h-index: 0
机构:
Virginia Tech, Ctr Energy Harvesting Mat & Syst, Blacksburg, VA 24061 USANovgorod State Univ, Inst Elect & Informat Syst, Veliky Novgorod 173003, Russia
Bedekar, Vishwas
Priya, Shashank
论文数: 0引用数: 0
h-index: 0
机构:
Virginia Tech, Ctr Energy Harvesting Mat & Syst, Blacksburg, VA 24061 USANovgorod State Univ, Inst Elect & Informat Syst, Veliky Novgorod 173003, Russia