First-principle study of magnetism in Co-doped SnO2

Wang, Hongxia; Yan, Yu; Mohammed, Yousif Shoaib; Du, Xiaobo; Li, Kai; Jin, Ho

doi:10.1016/j.jmmm.2008.09.020

Cited by 41 publications

(10 citation statements)

References 42 publications

(71 reference statements)

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“…The formation energy for oxygen or tin vacancy becomes smaller compared to that (8.790þE O eV for V O or 15.931þE Sn for V Sn ) without Zn atom doping, which shows that doping Zn atom in the SnO 2 system is beneficial to form oxygen and tin vacancies. Oxygen vacancies can suppress magnetic moments obviously, which is different from Co and Ni doped SnO 2 systems [20][21][22], however the magnetic moment (about 5.9 m B ) becomes larger when V Sn is introduced in Zn atom compared with that …”

Section: Stable Sites Of O and Sn Vacancies And Magnetic Properties Imentioning

confidence: 82%

“…Especially, Ogale et al [14] have found a giant magnetic moment (GMM) of 7.5 mB/Co in Co doped SnO 2 system. Theoretically, more attention has been paid to TMs doping SnO 2 systems such as Co [20,21], Ni [22], Mn [23] and Cu [24] doping SnO 2 systems; the results of these theoretical calculations show that the magnetic moments mainly come from TM atoms and oxygen vacancies tend to increase the magnetic moments of TM atoms. However, there are some questions about the origination of magnetic moment, which may arise from the doped magnetic ions in the lattice or metal precipitates or the secondary magnetic phases.…”

Section: Introductionmentioning

confidence: 99%

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Origin of ferromagnetism in Zn-doped SnO2 from first-principles study

Zhang

Tao

Tan

2013

Journal of Magnetism and Magnetic Materials

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Section: Stable Sites Of O and Sn Vacancies And Magnetic Properties Imentioning

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Origin of ferromagnetism in Zn-doped SnO2 from first-principles study

Zhang

Tao

Tan

2013

Journal of Magnetism and Magnetic Materials

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“…Therefore, these factors are also responsible for the ferromagnetism in Co 2? substituted SnO 2 nanoparticles [30,[36][37][38]. It is evident from the plots, that magnetization values reduces with increased Co 2?…”

Section: Magnetic Studiesmentioning

confidence: 93%

Microwave assisted synthesis of Sn(1−x)CoxO2 nanoparticles: effect of impurity phase formation on structural, optical and electrochemical properties

Sephra

Baraneedharan

Chidambaram

et al. 2016

J Mater Sci: Mater Electron

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Nanocrystalline Sn (1-x) Co x O 2 (x = 0, 0.01, 0.03 and 0.05) nanoparticles have been synthesized under microwave irradiation using oxalic acid (H 2 C 2 O 4 ) as reducing agent. X-ray diffraction studies show that the prepared nanoparticles are crystalline with tetragonal crystal system and with few additional phases, which is further supported by Raman spectroscopy. The variation in molar concentration of Co 2? ions had a significant effect on size and morphological aspects which is evident from high resolution microscopic images. The emission owing to band edge position, recombination with V o ?? centers and recombination with shallow level defects were observed from the Photoluminescence spectrum. The existence of room temperature ferromagnetism has been clearly observed using magnetization hysteresis measurements and the magnetic moments are found to decrease with the increased cobalt ions concentration. The decrease in charge carriers that arises due to the formed impurity phases and its significant effect on electron transfer capability have been discussed with the assistance of cyclic voltammetry. This study possibly will bring better insight for understanding the effects of doping concentration, formation of impurity phases and explicate the consequences of them on various properties of nanostructured materials.

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“…Theoretically, several first-principle computational investigations based on local-spin density approximation (LSDA) and generalized gradient approximation (GGA) have been reported on the magnetic properties of TM-doped SnO 2 [36][37][38][39][40]. It is known that LSDA or GGA often yield incorrect behavior for strongly correlated magnetic systems.…”

Section: Introductionmentioning

confidence: 99%