No Access Published Online: 25 June 2015
AIP Conference Proceedings 1665, 100009 (2015);
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  • Nilotpal Ghosh
  • Santhosh Raj
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 effect.
  1. 1. P. C. Canfield, et al., Annu. Rev. Condens.Matter Phys. 1:27–50(2010)., Google ScholarCrossref, ISI, CAS
  2. 2. Khasanov et al., J. Phys.: Condens. Matter 23 3422 (2011)., Google ScholarCrossref
  3. 3. K K. Huynh et al., Phys. Rev. Lett. 106, 217004 (2011)., Google ScholarCrossref
  4. 4. Ishida S. et al., Phys. Rev. B, 84, 184514 (2011)., Google ScholarCrossref
  5. 5. S. V. Chong et al., Euro Phys Lett., 104 17002 (2013)., Google ScholarCrossref
  6. 6. N. Ghosh et al., Solid State Commun. 150, 1940 (2010)., Google ScholarCrossref, ISI, CAS
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