Induced Room-Temperature Ferromagnetism in Un-doped Nanocrystalline Metal Oxide Powders Obtained by Mechanical Milling: A Review

Lemine, O.M.

doi:10.1007/s10948-016-3895-2

Cited by 5 publications

(3 citation statements)

References 30 publications

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“…Remarkably, undoped ZnO can also show RTFM [ 83 , 84 ]. Undoped ZnO nanostructures with RTFM were experimentally obtained through various methods, including sol-gel [ 84 , 85 , 86 ], pulsed laser deposition (PLD) [ 87 , 88 ], ball milling (BM) [ 89 , 90 ], PAD [ 29 , 43 , 44 , 71 ], electrochemical deposition method [ 91 ], chemical vapor deposition (CVD) [ 92 ], and ionic layer epitaxy (ILE) [ 64 ]. In general, the RTFM in ZnO is dependent on its morphology [ 21 , 43 , 44 , 71 ].…”

Section: Traditional Oxide-based Magnetic Semiconductor Thin Filmsmentioning

confidence: 99%

The Progress on Magnetic Material Thin Films Prepared Using Polymer-Assisted Deposition

2023

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Polymer-assisted deposition (PAD) has been widely used in the preparation of high-quality oxides and sulfides for basic research and applications. Specifically, diverse PAD-prepared magnetic material thin films such as ZnO, Ga2O3, SrRuO3, LaCoO3, LaMnO3, Y3Fe5O12, MoS2, MoSe2, and ReS2 thin films have been grown, in which thickness-dependent, strain-modulated, doping-mediated, and/or morphology-dependent room-temperature ferromagnetism (RTFM) have been explored. Inspired by the discovery of intrinsic low-temperature FM in two-dimensional (2D) systems prepared using mechanical exfoliation, the search for more convenient methods to prepare 2D ferromagnetic materials with high-temperature FM has seen explosive growth, but with little success. Fortunately, the very recent synthesis of 2D NiO by PAD has shed light on this challenge. Based on these abovementioned developments, the difficulties of PAD when preparing a-few-nanometer single-crystalline materials and the opportunities in PAD for novel materials such as chiral magnetic soliton material Cr1/3NbS2 are discussed.

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Section: Traditional Oxide-based Magnetic Semiconductor Thin Filmsmentioning

confidence: 99%

The Progress on Magnetic Material Thin Films Prepared Using Polymer-Assisted Deposition

2023

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“…Then, RTFM with a saturation magnetization up to 35.65 emu/g was also observed in undoped ZnO thin films (TFs) by pulsed laser deposition (PLD) and V Zn located at the surface or the interface of the samples could be the source of RTFM [40]. More importantly, various ZnO nanostructures with RTFM were obtained by various approaches, such as ionic layer epitaxy [41], polymer-assisted deposition (PAD) [42][43][44], electrochemical deposition method [45], sol-gel [36,46,47], ball milling (BM) [48][49][50], and PLD [51], etc.…”

Section: Introductionmentioning

confidence: 99%

Morphology-Dependent Room-Temperature Ferromagnetism in Undoped ZnO Nanostructures

Ren

Xiang

2021

Nanomaterials

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Since Dietl et al. predicted that Co-doped ZnO may show room-temperature ferromagnetism (RTFM) in 2000, researchers have focused on the investigation of ferromagnetic ZnO doped with various transition metals. However, after decades of exploration, it has been found that undoped ZnO nanostructures can also show RTFM, which in general is dependent on ZnO morphologies. Here, we will give an overall review on undoped ZnO nanomaterials with RTFM. The advanced strategies to achieve multidimensional (quasi-0D, 1D, 2D, and 3D) ferromagnetic ZnO nanostructures and the mechanisms behind RTFM are systematically presented. We have successfully prepared ferromagnetic nanostructures, including thin films, horizontal arrays and vertical arrays. The existing challenges, including open questions about quantum-bound ZnO nanostructures, are then discussed.

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“…Self-propagating high-temperature synthesis (SHS) is a known powerful method for large-scale production of titanium nitride [21][22][23]. Following [24][25][26][27], we used the mechanical milling (MM) for the induction of defects in microsized diamagnetic or paramagnetic powders, suggesting particle size reduction, the creation of defects and deformation of the lattice can be achieved by milling [28]. With increasing milling time or high rotation speed, more defects should be induced into the milled powders and the obtained microsized materials revealed a d 0 -ferromagnetic behavior [28].…”

Section: Introductionmentioning

confidence: 99%

d0-Ferromagnetism in SHS Titanium Nitride Treated by Ball Milling

Busurina

Белоусова

Ковалев

et al. 2019

Eurasian Chem. Tech. J.

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In this work, the influence of mechanical treatment (mechanical milling) of the TiN titanium nitride powder produced by self-propagating high-temperature synthesis on the magnetic properties of the milled powders is investigated. The effect of d0-magnetization was observed. The TiN powders were characterized by scanning electron microscopy, X-ray diffraction, vibrating-sample magnetometry, specific surface area measurement, and chemical analysis. The results show that the mechanical treatment of the TiN titanium nitride powder influences the magnetization in a nonmonotonic manner. The conditions of mechanical treatment corresponding to the best value of specific magnetization of milled powders were established. The specific magnetization depended on three measured parameters: specific surface area, coherent scattering region, and average particle size. It was shown that unit cell parameters of milled TiN titanium nitride powders have not been changed with the increasing of duration milling time. The calculated values of CSR of mechanically treated powders decreased with the increasing of duration of milling time. The values of macrostrains were negative. Mechanical treatment of the TiN titanium nitride powders has led to a change in the nitrogen content from 21.4 to 20.0 wt.%. Stoichiometry of the TiN titanium nitride varied from TiN0.903-TiN0.886; therefore, the observed d0-magnetization effect is associated with a defective surface structure of mechanically treated powders.

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Induced Room-Temperature Ferromagnetism in Un-doped Nanocrystalline Metal Oxide Powders Obtained by Mechanical Milling: A Review

Cited by 5 publications

References 30 publications

The Progress on Magnetic Material Thin Films Prepared Using Polymer-Assisted Deposition

The Progress on Magnetic Material Thin Films Prepared Using Polymer-Assisted Deposition

Morphology-Dependent Room-Temperature Ferromagnetism in Undoped ZnO Nanostructures

d0-Ferromagnetism in SHS Titanium Nitride Treated by Ball Milling

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