Unveiling the origin of room-temperature ferromagnetism in monolayer VSe2: the role of extrinsic effects

Background: The role of CeO2-doping (0.75-3 mol%) and calcination temperature on solid-solid interaction between ferric and cadmium oxides yielding cadmium ferrites was examined. Methods and Results: The results exposed that ceria improves the ferrite formation by heating at 600-700ºC via the dissolution of some dopant cation in the lattice of CdO with the subsequent creation of anionic vacancies and/or formation of higher valency cadmium cation (Cd(2+δ)+). SBET of solids calcined at 500oC increased by CeO2-doping, while opposite trend for solids calcined at 600 and 700oC. The magnetic hysteresis loops of all samples showed room-temperature ferromagnetism with different hysteresis loop shapes. Conclusion: Magnetization increased by CeO2-doping that might be due to the enhancement of cadmium ferrite formation. Ethanol conversion increased by increasing CeO2-doping. Dehydrogenation product (acetaldehyde) was mainly the yield of ethanol conversion. The maximum yield of acetaldehyde (92.97%) carried out for solids doped with 3 mol% CeO2.

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Tunable room temperature ferromagnetism in Sn0.93Fe0.05M0.02O2−σ (M=Sb/Mg): The role of electron- and hole-doping

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2011.01.211 ◽

2011 ◽

Vol 509 (15) ◽

pp. 5008-5011 ◽

Cited By ~ 4

Author(s):

C. Ke ◽

W. Zhu ◽

J.S. Pan ◽

Z. Yang ◽

Z.P. Li ◽

...

Keyword(s):

Room Temperature ◽

Room Temperature Ferromagnetism ◽

Hole Doping

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Role of multivalent Cu, oxygen vacancies and CuO nanophase in the ferromagnetic properties of ZnO:Cu thin films

RSC Advances ◽

10.1039/c5ra09002d ◽

2015 ◽

Vol 5 (69) ◽

pp. 55648-55657 ◽

Cited By ~ 14

Author(s):

M. Younas ◽

Junying Shen ◽

Mingquan He ◽

R. Lortz ◽

Fahad Azad ◽

...

Keyword(s):

Thin Film ◽

Thin Films ◽

Room Temperature ◽

Oxygen Vacancies ◽

Room Temperature Ferromagnetism ◽

Simultaneous Presence ◽

Ferromagnetic Properties

Room temperature ferromagnetism (FM) of these thin film samples are highly tuneable by the simultaneous presence of CuO nanophases and multivalent Cu and Vö concentrations.

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Role of oxygen vacancies in room-temperature ferromagnetism in cobalt-substitutedSrTiO3

Physical Review B ◽

10.1103/physrevb.90.125130 ◽

2014 ◽

Vol 90 (12) ◽

Cited By ~ 12

Author(s):

Chandrima Mitra ◽

Chungwei Lin ◽

Agham B. Posadas ◽

Alexander A. Demkov

Keyword(s):

Room Temperature ◽

Oxygen Vacancies ◽

Room Temperature Ferromagnetism

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ELECTRON CARRIER-MEDIATED ROOM TEMPERATURE FERROMAGNETISM IN ANATASE (Ti,Co)O2

SPIN ◽

10.1142/s2010324712300058 ◽

2012 ◽

Vol 02 (04) ◽

pp. 1230005 ◽

Cited By ~ 6

Author(s):

TOMOTERU FUKUMURA ◽

YOSHINORI YAMADA ◽

KAZUNORI UENO ◽

HONGTAO YUAN ◽

HIDEKAZU SHIMOTANI ◽

...

Keyword(s):

Exchange Interaction ◽

Room Temperature ◽

Room Temperature Ferromagnetism ◽

Charge Carriers ◽

Electric Field Effect ◽

Chemical Doping ◽

Principal Role ◽

Fundamental Properties ◽

Ferromagnetic Exchange

Since the discovery of room temperature ferromagnetism in ( Ti,Co ) O2 , the mechanism has been under discussion for a decade. Particularly, the central concern has been whether or not the ferromagnetic exchange interaction is mediated by charge carriers like ( Ga,Mn ) As . Recent two studies on the control of ferromagnetism in anatase ( Ti,Co ) O2 at room temperature via electric field effect [Y. Yamada et al., Science332, 1065 (2011)] and chemical doping [Y. Yamada et al., Appl. Phys. Lett.99, 242502 (2011)] indicate a principal role of electrons in the carrier-mediated exchange interaction. In this article, the authors review fundamental properties of anatase ( Ti,Co ) O2 and discuss the carrier mediated ferromagnetism.

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