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Boundary current response in Ba0.34K0.64Fe2As2 superconducting single crystal probed by non-resonant microwave absorption technique

Non-resonant microwave absorption (NRMA) in superconducting materials has become a new experimental technique to probe and understand superconducting materials. For example cuprate superconductors are well studied with this technique. At the same time the technique is also evolving. This technique (NRMA) has been used to study magnetic shielding effects/boundary current in Ba0.34K0.64Fe2As2 (BaK122) single crystals of iron pnictides superconducting sample measured at 9.4 GHz below TC (4.2K-32K). It has been observed that a small modulation field used in NRMA experiment yield the boundary current response. We have established that the boundary current response depends on both modulation amplitude and the temperature. At high modulation field amplitudes and temperatures close to Tc the boundary current response gets suppressed and flux modulated response dominates. At low temperatures far away from Tc, only the boundary current response dominates. / Physics / M. Sc. (Physics)

Identiferoai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:unisa/oai:uir.unisa.ac.za:10500/22966
Date06 1900
CreatorsRamashitja, Tshiwela Caroline
ContributorsVallabhapurapu, Vijaya Srinivasu, Sankaran, Vaith
Source SetsSouth African National ETD Portal
LanguageEnglish
Detected LanguageEnglish
TypeDissertation
Format1 online resource (x, 84 leaves) : color illustrations

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