Room temperature ferromagnetic Zn0.98Co0.02O powders with improved visible-light photocatalysis

RSC Advances ◽  
2016 ◽  
Vol 6 (8) ◽  
pp. 6761-6767 ◽  
Author(s):  
Huiyun Zhang ◽  
Wei Hao ◽  
Yanqiang Cao ◽  
Xiaofeng Chang ◽  
Mingxiang Xu ◽  
...  
Keyword(s):  
Band Structure ◽  
Visible Light ◽  
Room Temperature ◽  
Diluted Magnetic Semiconductors ◽  
Magnetic Semiconductors ◽  
Energy Levels ◽  
Fine Tuning ◽  
Visible Light Photocatalysis ◽  
Diluted Magnetic

The realization of ferromagnetic diluted magnetic semiconductors requires the fine tuning of the energy levels of the band structure, which might have important applications in photocatalysis.

scholarly journals Direct probing of band-structure Berry phase in diluted magnetic semiconductors

2015 ◽  
Vol 91 (23) ◽  
Author(s):  
M. Granada ◽  
D. Lucot ◽  
R. Giraud ◽  
A. Lemaître ◽  
C. Ulysse ◽  
...  
Keyword(s):  
Band Structure ◽  
Diluted Magnetic Semiconductors ◽  
Berry Phase ◽  
Magnetic Semiconductors ◽  
Diluted Magnetic

Novel Room-temperature Ferromagnetic Semiconductors Pb1-x-yCaxCryTe

2009 ◽  
Vol 1183 ◽  
Author(s):  
Evgeny P. Skipetrov ◽  
Elena A. Zvereva ◽  
Nikolay A. Pichugin ◽  
Alexey E. Primenko ◽  
Evgeny I. Slyn'ko ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Curie Temperature ◽  
Room Temperature ◽  
Diluted Magnetic Semiconductors ◽  
Magnetic Semiconductors ◽  
Impurity Level ◽  
Ferromagnetic Semiconductors ◽  
Magnetization Curves ◽  
Diluted Magnetic ◽  
Ferromagnetic Ordering

Abstract The galvanomagnetic and magnetic properties of novel diluted magnetic semiconductors Pb1-x-yCaxCryTe (x=0.06-0.20, y=0.003-0.045) have been investigated. Temperature dependencies of the resistivity and the Hall coefficient have a metallic character indicating the pinning of Fermi level by the chromium impurity level on the background of the conduction band states. Magnetization curves display a clear hysteresis loop over the whole temperature range investigated. The Curie temperature, determined from the temperature dependencies of magnetization, achieves 345 K. Possible mechanisms of ferromagnetic ordering were discussed.

Zeeman effect of the energy levels ofFe2+in diluted magnetic semiconductors

1993 ◽  
Vol 47 (3) ◽  
pp. 1228-1236 ◽  
Author(s):  
Murielle Villeret ◽  
Sergio Rodriguez ◽  
E. Kartheuser
Keyword(s):  
Diluted Magnetic Semiconductors ◽  
Magnetic Semiconductors ◽  
Energy Levels ◽  
Zeeman Effect ◽  
Diluted Magnetic

Fabrication and Characterisation of Diluted Magnetic Semiconductors Thin Films Using Ion Beams

2012 ◽  
Vol 706-709 ◽  
pp. 2869-2873
Author(s):  
M. Ionescu ◽  
P. Photongkam ◽  
R. Siegele ◽  
A. Deslantes ◽  
S. Li ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Room Temperature ◽  
Diluted Magnetic Semiconductors ◽  
Depth Distribution ◽  
Magnetic Semiconductors ◽  
Ion Irradiation ◽  
Research Effort ◽  
Critical Parameters ◽  
Ferromagnetic Behavior ◽  
Diluted Magnetic

The intrinsic n-type (II-VI) semiconductor ZnO may become ferromagnetic at room temperature, by small additions of magnetic ions, resulting in what is called a Diluted Magnetic Semiconductors (DMS). The potential application of DMS in spintronic devices of is driving the research effort to dope magnetic elements into this semiconductors with a depth distribution as uniform as possible. The doping levels and the depth distribution of dopants are critical parameters for the magnetic properties of this material and the possible clustering of dopants can play a significant negative role in its macroscopic magnetic properties. Thin ZnO (0001) films of between 100nm and 500nm, grown on c-Al2O3 by MOCVD were implanted with Co, Eu and Co+Eu by ion irradiation at low energies. In order to improve the depth distribution of dopants, the ion implantation was carried out through a number of appropriately chosen range foils. The results show an increase in the level of dopant homogeneity throughout the entire thickness of the film, and a ferromagnetic behavior above room temperature for Zn0.96Co0.04O, Zn0.96Eu0.04O and Zn0.92Co0.04Eu0.04O.

ESR Study of Novel Room-Temperature Ferromagnetic Semiconductors Pb1-X-YSnxCryTe

2010 ◽  
Vol 168-169 ◽  
pp. 404-407
Author(s):  
E.A. Zvereva ◽  
O.A. Savelieva ◽  
S. Ibragimov ◽  
E. Samokhvalov ◽  
E.I. Slynko ◽  
...  
Keyword(s):  
Room Temperature ◽  
Diluted Magnetic Semiconductors ◽  
Magnetic Semiconductors ◽  
Magnetic Ordering ◽  
Esr Spectra ◽  
Chromium Concentration ◽  
Ferromagnetic Phase ◽  
Wide Range ◽  
Diluted Magnetic ◽  
Ordering Transition

We report on the magnetic properties of novel diluted magnetic semiconductors Pb1 x ySnxCryTe revealing ferromagnetism at temperatures higher than room temperature. Depending on chromium concentration the Curie temperature varies in a wide range (150360 K) and effective magnetic moment achieves 1 B upon an increase of chromium doping level. Electron spin resonance (ESR) spectra in the paramagnetic phase were satisfactory approximated by a single Dysonian line. Effective g-factor tends to the saturation value g=2.080.01, while the linewidth passes through a minimum in the vicinity of magnetic ordering transition and then broadens with an increase of the temperature. In ferromagnetic phase the pronounced distortion and splitting of the ESR spectra into two lines occurs due to additional ferromagnetic contribution to absorption.

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