Effect of Ho dopant on the ferromagnetic characteristics of MoS2 nanocrystals

2019 ◽  
Vol 21 (1) ◽  
pp. 232-237 ◽  
Author(s):  
Qi Zhao ◽  
Chengbo Zhai ◽  
Qing Lu ◽  
Mingzhe Zhang
Keyword(s):  
Magnetic Moment ◽  
Room Temperature ◽  
Doping Concentration ◽  
Room Temperature Ferromagnetism

The as-synthesized Ho-doped MoS2 nanocrystals show intrinsic room-temperature ferromagnetism and their magnetic moment can be tuned by the doping concentration.

Ferromagnetism properties of Er-doped ZnO: a GGA + U study

RSC Advances ◽  
2016 ◽  
Vol 6 (109) ◽  
pp. 107865-107870 ◽  
Author(s):  
Sanjun Wang ◽  
Xiaobo Shi ◽  
Jinming Li
Keyword(s):  
Magnetic Moment ◽  
First Principles ◽  
Room Temperature ◽  
Room Temperature Ferromagnetism ◽  
First Principles Calculation ◽  
Doped Zno ◽  
Er Doped ◽  
Zn Vacancy

Our first-principles calculation finds that only the Zn vacancy can induce a 1.0 μB magnetic moment in Er-doped ZnO, which comes from the unpaired 2p electrons at the ligand O atom and results in the room-temperature ferromagnetism property of ZnO.

Room-temperature ferromagnetism in Co doped MoS2 sheets

2015 ◽  
Vol 17 (24) ◽  
pp. 15822-15828 ◽  
Author(s):  
ZhongCheng Xiang ◽  
Zhong Zhang ◽  
XiJin Xu ◽  
Qin Zhang ◽  
QingBao Wang ◽  
...  
Keyword(s):  
Magnetic Moment ◽  
Room Temperature ◽  
Room Temperature Ferromagnetism ◽  
Co Doped

We synthesized MoS2 nanosheets with varying Co dopant concentrations; the result implied that the values of the magnetic moment decreased with the increase of the Co dopant concentrations.

THE ORIGIN OF ROOM TEMPERATURE FERROMAGNETISM IN Co-TiO2 SYSTEM

2008 ◽  
Vol 22 (01n02) ◽  
pp. 63-69 ◽  
Author(s):  
J. S. PAN ◽  
J. W. CHAI ◽  
S. J. WANG ◽  
J. G. TAO ◽  
C. H. A. HUAN
Keyword(s):  
Magnetic Moment ◽  
Room Temperature ◽  
Annealing Temperature ◽  
Room Temperature Ferromagnetism ◽  
Saturation Magnetic Moment ◽  
Transmission Electron ◽  
High Annealing ◽  
Annealing Effects ◽  
Composition Structure

The annealing effects on the composition, structure and magnetism for Co overlayer deposited onto rutile TiO 2 (100) surfaces at room temperature has been investigated. Room temperature ferromagnetic behaviour is exhibited for all samples, but saturation magnetic moment per Co atom decreases with increasing annealing temperature until 530°C. In-situ photoemission studies show that the reduction of the saturation magnetic moment is due to Co oxidation at high annealing temperature. However, the saturation magnetic moment increases after annealing the sample up to 700°C. The formation of a Co - Ti - O phase rather than Co metallic clusters observed by high-resolution transmission electron microscopy is suggested to be responsible for the increase of the saturation magnetic moment.

Room-Temperature Ferromagnetism in Ni-Doped Na0.5Bi0.5TiO3 Crystals

2011 ◽  
Vol 189-193 ◽  
pp. 622-625 ◽  
Author(s):  
Lin Lin Yang ◽  
Yong Gang Wang ◽  
Yu Jiang Wang ◽  
Xiao Feng Wang
Keyword(s):  
Magnetic Property ◽  
Measurement System ◽  
Room Temperature ◽  
Doping Concentration ◽  
Room Temperature Ferromagnetism ◽  
X Ray Diffraction ◽  
Multiferroic Materials ◽  
Ni Doping ◽  
X Ray ◽  
Property Measurement

Ni-doped Na0.5Bi0.5TiO3 crystals were synthesized and studied by X-ray diffraction (XRD), X-ray spectroscopy (EDS), and magnetic property measurement system (MPMS). Room-temperature ferromagnetism has been observed in Ni-doped Na0.5Bi0.5TiO3 crystals. It was found that the magnetism of NBT crystals can be controlled by Ni doping concentration. The magnetism of the Ni-doped Na0.5Bi0.5TiO3 crystals develops from diamagnetism to ferromagnetism and paramagnetism on increasing Ni doping concentration from 0 to 1.25mol %. The results presented in this study may provide an approach to widely exploring more multiferroic materials.

Ferromagnetism in undoped semiconductors

2011 ◽  
Vol 1370 ◽  
Author(s):  
Yandong Ma ◽  
Ying Dai ◽  
Baibiao Huang
Keyword(s):  
Spin Polarization ◽  
Magnetic Moment ◽  
Room Temperature ◽  
Room Temperature Ferromagnetism ◽  
Local Magnetic Moment ◽  
Semiconductor Materials ◽  
Ferromagnetic Coupling ◽  
Dangling Bonds ◽  
Ferromagnetic Properties ◽  
Cation Vacancies

ABSTRACTThe so-called “d0” magnetism observed in semiconductors, which is not caused by partially filled d orbitals, has challenged our conventional understanding on the origin of magnetism. One class of semiconductor materials showing d0 ferromagnetism is undoped oxides and nitrides. Here, we review the ferromagnetic properties of undoped GaN and MgO based on our recent investigations. It is revealed that the room-temperature ferromagnetism originates from the anion dangling bonds associated with the surface cation-vacancies. And the magnetism of ferromagnetic coupling between the vacancy induced local magnetic moment by through-bond spin polarization in undoped semiconductors is reviewed according to our works.

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