skip to main content

SciTech ConnectSciTech Connect

Title: Aging effect in magnetotransport property of oxygen adsorbed BaFe{sub 2}As{sub 2}

Presence of oxygen (O{sub 2}) has been found by Energy Dispersive X-ray Analysis (EDAX) on the surfaces of flux grown BaFe{sub 2}As{sub 2} single crystals which were kept in air ambience for several months. Transport studies show that the O{sub 2} 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 (T{sub SDW}) accompanying structural transition for as grown BaFe{sub 2}As{sub 2}. 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 T{sub SDW} which may be attributed to aging effect.
Authors:
;  [1]
  1. School of Advanced Sciences, VIT University, Chennai Campus-600127, Tamilnadu (India)
Publication Date:
OSTI Identifier:
22490479
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1665; Journal Issue: 1; Conference: 59. DAE solid state physics symposium 2014, Tamilnadu (India), 16-20 Dec 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; AGING; BARIUM COMPOUNDS; CRYSTAL GROWTH; DENSITY; IRON ARSENIDES; MAGNETORESISTANCE; MONOCRYSTALS; OXYGEN; PHASE TRANSFORMATIONS; SPIN; SURFACES; TEMPERATURE DEPENDENCE; TRANSITION TEMPERATURE; X-RAY SPECTROSCOPY