Open AccessPeak Effects in 2H-NbSe2 Single Crystals Induced by Particle Irradiations
Author(s) -
Wenjie Li,
Sunseng Pyon,
Satoru Okayasu,
T. Tamegai
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1975/1/012003
Subject(s) - squid , condensed matter physics , magnetometer , superconductivity , materials science , magnetization , field (mathematics) , critical current , particle (ecology) , irradiation , magnetic field , nuclear magnetic resonance , optics , physics , nuclear physics , ecology , oceanography , mathematics , quantum mechanics , geology , pure mathematics , biology
Effects of three kinds of columnar defects in NbSe 2 single crystals introduced by 320 MeV Au irradiation with a dose equivalent matching field B Φ up to 4 T were studied. Through the magnetization measurement using a SQUID magnetometer, two pronounced peak effects in the external field dependence of critical current density ( J c ) were observed in crystals introduced with splayed and tilted columnar defects. In crystals with splayed columnar defects, J c at the peak field reaches the maximum for splay angle θ CD = ±10°, which is a little different from that found in YBa 2 Cu 3 O 7 and iron-based superconductors, where optimal θ CD is equal to ±5°.