Aging effect in magnetotransport property of oxygen adsorbed BaFe2As2
Nilotpal Ghosh,Santhosh Raj +1 more
- Vol. 1665, Iss: 1, pp 100009
TLDR
In this article, the presence of oxygen (O2) has been found by Energy Dispersive X-ray Analysis (EDAX) on the surfaces of flux grown BaFe2As2 single crystals which were kept in air ambience for several months.Abstract:
Presence of oxygen (O2) has been found by Energy Dispersive X-ray Analysis (EDAX) on the surfaces of flux grown BaFe2As2 single crystals which were kept in air ambience for several months Transport studies show that the O2 adsorbed crystals are more resistive and do not display any sharp slope change near 140 K which is the well known Spin Density Wave (SDW) transition temperature (TSDW) accompanying structural transition for as grown BaFe2As2 An anomalous slope change in resistivity is observed around 18 K at 0 and 5T Magnetoresistance (MR) is noticed to increase as a function of applied field (H) quite differently than that for as grown crystals below TSDW which may be attributed to aging effectread more
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Journal ArticleDOI
The effects of post-growth annealing on the structural and magnetic properties of BaFe2As2.
T. R. Forrest,P. N. Valdivia,Costel R. Rotundu,Edith Bourret-Courchesne,Robert J. Birgeneau,Robert J. Birgeneau +5 more
TL;DR: Measurements demonstrate that the structural phase transition is second-order like when the magnetic and structural phase transitions are separated in temperature, and first-orderlike when the two phase transition temperatures coincide, and indicates that annealing causes the system to cross a hitherto undiscovered tricritical point.
Journal ArticleDOI
Investigation of Oxygen-Adsorbed Iron Pnictide Crystals
TL;DR: In this article, a new compound of YbFe2As2 was synthesized by using a melt growth technique, which was characterized by scanning electron microscopy and energy dispersive X-ray analysis (EDAX).
Journal ArticleDOI
Structural and chemical properties of superconducting Co-doped BaFe2As2 thin films grown on CaF2
Lukas Grünewald,Marco Langer,Sven Meyer,Daniel Nerz,Jens Hänisch,Bernhard Holzapfel,Dagmar Gerthsen +6 more
TL;DR: In this paper, an analytical transmission electron microscopy (TEM) was applied to analyze the microstructure and secondary phases of Co-doped BaFe(2$As$_2$ ) with different growth rates.
Journal ArticleDOI
X-ray photoelectron spectroscopy study on YbFe2As2 crystals prepared by different growth temperatures
TL;DR: In this article, a double-step solid-state reaction method was used to synthesize polycrystalline samples of YbFe2As2 by using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive Xray analysis (EDAX), and Xray photoelectron spectroscopy (XPS).