Magnetic and dielectric study of Fe-doped CdSe nanoparticles

被引：7

作者：

Das, Sayantani ^{[1
]}

Banerjee, Sourish ^{[1
]}

Bandyopadhyay, Sudipta ^{[1
]}

Sinha, Tripurari Prasad ^{[2
]}

机构：

[1] Univ Calcutta, Dept Phys, Kolkata 700009, India

[2] Bose Inst, Dept Phys, Kolkata 700009, India

来源：

ELECTRONIC MATERIALS LETTERS | 2018年 / 14卷 / 01期

关键词：

Fe doped CdSe nano-particle; chemical route; Curie-Weiss temperature; activation energy; SEMICONDUCTORS; ACTIVATION; CONDUCTION; OXIDES;

D O I：

10.1007/s13391-017-6265-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nanoparticles of cadmium selenide (CdSe) and Fe (5% and 10%) doped CdSe have been synthesized by soft chemical route and found to have cubic structure. The magnetic field dependent magnetization measurement of the doped samples indicates the presence of anti-ferromagnetic order. The temperature dependent magnetization (M-T) measurement under zero field cooled and field cooled conditions has also ruled out the presence of ferromagnetic component in the samples at room temperature as well as low temperature. In order to estimate the anti-ferromagnetic coupling among the doped Fe atoms, an M-T measurement at 500 Oe has been carried out, and the Curie-Weiss temperature theta of the samples has been estimated from the inverse of susceptibility versus temperature plots. The dielectric relaxation peaks are observed in the spectra of imaginary part of dielectric constant. The temperature dependent relaxation time is found to obey the Arrhenius law having activation energy similar to 0.4 eV for Fe doped samples. The frequency dependent conductivity spectra are found to obey the power law.

引用

页码：52 / 58

页数：7

共 27 条

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