Room temperature ferromagnetism in Co-doped amorphous carbon composites from the spin polarized semiconductor band

2014 ◽  
Vol 105 (5) ◽  
pp. 052410 ◽  
Author(s):  
H. S. Hsu ◽  
P. C. Chien ◽  
S. J. Sun ◽  
Y. Y. Chang ◽  
C. H. Lee
Keyword(s):  
Amorphous Carbon ◽  
Room Temperature ◽  
Room Temperature Ferromagnetism ◽  
Carbon Composites ◽  
Spin Polarized ◽  
Co Doped

Spin-Polarized Room Temperature Ferromagnetism in Co-doped ZnO synthesized by Electrodeposition

2021 ◽  
Author(s):  
Santosh Kumar ◽  
Deepika ◽  
Raju Kumar ◽  
Ritesh Kumar ◽  
Pratyush Vaibhav ◽  
...  
Keyword(s):  
Room Temperature ◽  
Room Temperature Ferromagnetism ◽  
Spin Polarized ◽  
Doped Zno ◽  
Co Doped

Ga1-xGdxN-Based Spin Polarized Light Emitting Diode

2011 ◽  
Vol 1290 ◽  
Author(s):  
Muhammad Jamil ◽  
Tahir Zaidi ◽  
Andrew Melton ◽  
Tianming Xu ◽  
Ian T. Ferguson
Keyword(s):  
Room Temperature ◽  
Light Emitting Diode ◽  
Room Temperature Ferromagnetism ◽  
Polarized Light ◽  
Type Material ◽  
Degree Of Polarization ◽  
Co Doping ◽  
Spin Polarized ◽  
P Type ◽  
Co Doped

ABSTRACTIn this work, a room temperature spin-polarized LED based on ferromagnetic Ga1-xGdxN is reported. The device was grown by metalorganic chemical vapor deposition (MOCVD) and is the first report of a spin-LED based on Ga1-xGdxN. Electroluminescence from this device had a degree of polarization of 14.6% at 5000 Gauss and retained a degree of polarization of 9.3% after removal of the applied magnetic field. Ga1-xGdxN thin films were grown on 2 μm GaN templates and were co-doped with Si and Mg to achieve n-type and p-type materials. Co-doping of the Ga1-xGdxN films with Si produced conductive n-type material, while co-doping with Mg produced compensated p-type material. Both Si and Mg co-doped films exhibited room temperature ferromagnetism, measured by vibrating sample magnetometry.

ROOM-TEMPERATURE FERROMAGNETIC PROPERTIES OF Co-DOPED ZnO NAOROD ARRAYS

2013 ◽  
Vol 27 (15) ◽  
pp. 1362010 ◽  
Author(s):  
C. L. ZHANG ◽  
C. G. HU
Keyword(s):  
Room Temperature ◽  
Room Temperature Ferromagnetism ◽  
Ferromagnetic Behavior ◽  
Secondary Phases ◽  
X Ray Diffraction ◽  
Polarized Electrons ◽  
Spin Polarized ◽  
Doped Zno ◽  
Zinc Foils ◽  
Co Doped

Co -doped ZnO rod arrays were fabricated on zinc foils by a hydrothermal method. X-ray diffraction results indicate that the samples have wurtzite crystalline structure without metallic Co or other secondary phases detected. The nanorod arrays exhibit room-temperature ferromagnetic behavior for different Co concentration. The influence of Co on the magnetic properties of ZnO was studied by the first-principles calculations. The exchange interaction between local spin-polarized electrons and conductive electrons is proposed as a cause of the room-temperature ferromagnetism.

Origin of room-temperature ferromagnetism in Co-doped CeO2

2021 ◽  
pp. 413158
Author(s):  
Kenji Tarui ◽  
Tomohiro Oomori ◽  
Yuya Ito ◽  
Tomoyuki Yamamoto
Keyword(s):  
Room Temperature ◽  
Room Temperature Ferromagnetism ◽  
Doped Ceo2 ◽  
Co Doped

Nitrogen doping-mediated room-temperature ferromagnetism in insulating Co-doped SnO2 films

2010 ◽  
Vol 256 (14) ◽  
pp. 4488-4492 ◽  
Author(s):  
X.F. Liu ◽  
Javed Iqbal ◽  
S.L. Yang ◽  
B. He ◽  
R.H. Yu
Keyword(s):  
Nitrogen Doping ◽  
Room Temperature ◽  
Room Temperature Ferromagnetism ◽  
Co Doped

Room-Temperature Ferromagnetism of Co-Doped CeO 2 Thin Films on Si(111) substrates

2007 ◽  
Vol 24 (1) ◽  
pp. 218-221 ◽  
Author(s):  
Song Yuan-Qiang ◽  
Zhang Huai-Wu ◽  
Wen Qi-Ye ◽  
Li Yuan-Xun ◽  
John Q Xiao
Keyword(s):  
Thin Films ◽  
Room Temperature ◽  
Room Temperature Ferromagnetism ◽  
Co Doped

The Room Temperature Ferromagnetism of (N, Co) Co-Doped ZnO Nanopaticles

2014 ◽  
Vol 577 ◽  
pp. 19-22
Author(s):  
Ping Cao ◽  
Yue Bai ◽  
Zhi Qu
Keyword(s):  
Zno Nanoparticles ◽  
Room Temperature ◽  
Room Temperature Ferromagnetism ◽  
Crystal Lattices ◽  
Grown Sample ◽  
N Doping ◽  
Doped Zno ◽  
Zno Crystal ◽  
Zno Nanopaticles ◽  
Co Doped

Co-doped ZnO nanoparticles were fabricated by an electrodeposition method. The XPS results show Co ions have doped into the ZnO crystal lattices successfully. The as-grown sample has no ferromagnetism at room temperature. But after an ammine plasma treatment the room temperature ferromagnetism were detected on Co0.04Zn0.96O nanoparticles. The Hall measurement reveals after the treatment the resistivity increase by three orders of magnitude. Although the aspect conductivity is n type, some holes generated by N doping play an important role to induce the ferromagnetic properties for Co doped ZnO sample.

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