Defect-Induced Room-Temperature Ferromagnetism in &lt;inline-formula&gt; &lt;tex-math notation="TeX"&gt;${\rm SnO}_{2}$ &lt;/tex-math&gt;&lt;/inline-formula&gt; Nanowires Controlled by UV Light Irradiation

Bhaumik, S.; Sinha, Arun K.; Ray, S. K.; Das, A. K.

doi:10.1109/tmag.2013.2292575

Cited by 4 publications

(1 citation statement)

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“…In recent years, the ferromagnetism (FM) has been reported in undoped oxides, such as HfO2, TiO2, In2O3, CeO2, Al2O3, SnO2 and ZnO [1][2][3][4][5][6][7] . This observed ferromagnetism in materials, containing no intrinsic magnetic elements, is termed d 0 ferromagnetism 8 .…”

Section: Introductionmentioning

confidence: 99%

Point Defects Induced Ferromagnetism in Neutron Irradiated MgO(110) Single Crystals

曹梦雄¹,

王兴宇²,

马亚茹³

et al. 2018

Acta Physico-Chimica Sinica

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210094 2 杭州电子科技大学材料物理研究所，杭州 310018 3 湖南城市学院信息与电子工程学院，湖南益阳 413002 摘要：对MgO(110)单晶进行中子辐照，辐照剂量从1.0 × 10 16 到1.0 × 10 20 cm −2 。基于黄昆漫散射理论，我们计算了MgO晶体中的立方缺陷和偶极力缺陷引起的X射线漫散射强度分布图。通过X射线漫散射及紫外-可见光(UV-Vis)吸收光谱实验表征了晶体的点缺陷组态，并利用超导量子干涉仪(SQUID)测量了样品的磁性。ω-2θ和摇摆曲线说明MgO单晶经中子辐照后产生了晶格畸变，晶体中存在一定浓度的点缺陷。倒易空间图(RSM)显示中子辐照的MgO单晶存在漫散射现象。与计算得到的漫散射分布图对比分析可知，中子辐照的MgO(110)单晶中产生了弗仑克尔缺陷。UV-Vis吸收光谱表明所有辐照晶体中存在阴离子单空位缺陷。辐照剂量较高(1.0 × 10 19 和1.0 × 10 20 cm −2)的样品中存在O空位的聚集。磁性测量显示中子辐照后的 MgO(110)单晶在室温下依然是抗磁性，但在低温下具有铁磁性，最大饱和磁化强度达到0.058 emu•g −1 。通过中子辐照的方法，可以使MgO(110)单晶产生点缺陷引起的低温铁磁性。利用F色心交换机制可以解释中子辐照MgO晶体中的O空位缺陷与铁磁性之间的关系。关键词：MgO单晶；中子辐照；点缺陷；d 0 铁磁性；RSM；色心中图分类号：O649

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Section: Introductionmentioning

confidence: 99%

Point Defects Induced Ferromagnetism in Neutron Irradiated MgO(110) Single Crystals

曹梦雄¹,

王兴宇²,

马亚茹³

et al. 2018

Acta Physico-Chimica Sinica

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Genesis and tuning of ferromagnetism in SnO2 semiconductor nanostructures: Comprehensive review on size, morphology, magnetic properties and DFT investigations

Manikandan

Murugan

2022

Progress in Materials Science

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Defect driven ferromagnetism in SnO₂: a combined study using density functional theory and positron annihilation spectroscopy

Sarkar¹,

Sanyal

Nath

et al. 2015

RSC Adv.

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Room temperature ferromagnetic ordering has been observed in high purity polycrystalline SnO 2 sample due to irradiation of 96 MeV oxygen ions. Ab initio calculation in the density functional theory indicates that tin vacancies are mainly responsible for inducing magnetic moment in SnO 2 whereas oxygen vacancies in SnO 2 do not contribute any magnetic moment. Positron annihilation spectroscopy has been employed to characterize the chemical identity of irradiation generated defects in SnO 2 .Results indicate the dominant presence of Sn vacancies in O ion irradiated SnO 2 . The irradiated sample turns out to be ferromagnetic at room temperature.

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Defect-Induced Room-Temperature Ferromagnetism in <inline-formula> <tex-math notation="TeX">${\rm SnO}_{2}$ </tex-math></inline-formula> Nanowires Controlled by UV Light Irradiation

Cited by 4 publications

References 30 publications

Point Defects Induced Ferromagnetism in Neutron Irradiated MgO(110) Single Crystals

Point Defects Induced Ferromagnetism in Neutron Irradiated MgO(110) Single Crystals

Genesis and tuning of ferromagnetism in SnO2 semiconductor nanostructures: Comprehensive review on size, morphology, magnetic properties and DFT investigations

Defect driven ferromagnetism in SnO₂: a combined study using density functional theory and positron annihilation spectroscopy

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Defect-Induced Room-Temperature Ferromagnetism in <inline-formula> <tex-math notation="TeX">${\rm SnO}_{2}$ </tex-math></inline-formula> Nanowires Controlled by UV Light Irradiation

Cited by 4 publications

References 30 publications

Point Defects Induced Ferromagnetism in Neutron Irradiated MgO(110) Single Crystals

Point Defects Induced Ferromagnetism in Neutron Irradiated MgO(110) Single Crystals

Genesis and tuning of ferromagnetism in SnO2 semiconductor nanostructures: Comprehensive review on size, morphology, magnetic properties and DFT investigations

Defect driven ferromagnetism in SnO2: a combined study using density functional theory and positron annihilation spectroscopy

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Defect driven ferromagnetism in SnO₂: a combined study using density functional theory and positron annihilation spectroscopy