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Berlin 2018 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 35: Superconductivity: Fe-based Superconductors - 122 and Theory

TT 35.6: Talk

Tuesday, March 13, 2018, 10:45–11:00, A 053

Synthesis and Characterization of YbFe2As2 Single Crystals — •Nilotpal Ghosh1, Santhosh Raj2, and R Navamathavan21Science and Engineering Research Board, Department of Science and Technology, Vasant Kunj, New Delhi, India — 2School of Advanced Sciences ,VIT University, Chennai, Tamilnadu, India

We report synthesization of a new compound YbFe2As2 crystals using melt growth technique. The crystals have been characterized by Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray Analysis (EDX). Rietveld refinement of crushed single crystals has shown that the YbFe2As2 has monoclinic unit cell structure. Transport measurement has shown metallic behavior with a down turn in resistivity around 17K for YbFe2As2 which is similar to superconducting transition. The detailed magnetic studies by SQUID on these crystals have revealed the co-existence of strong antiferromagnetic and weak ferromagnetic characteristics. Influence of anti-ferromagnetic spin fluctuation in the normal state transport property has been found. Effect of oxygen adsorption on YbFe2As2 have been studied in detail.
S. S. Raj, N. Ghosh, R. Navamathavan, J. Supercond. Novel Magnetism 30 (2017) 287;
S. S. Raj, N. Ghosh, R. Navamathavan, Mater. Res. Express 4 (2017) 086101;

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