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Effect of magnetic impurities on the vortex lattice properties in NbSe2 single crystals
Journal article

Effect of magnetic impurities on the vortex lattice properties in NbSe2 single crystals

M. Iavarone, R. Di Capua, G. Karapetrov, A. E. Koshelev, D. Rosenmann, H. Claus, C. D. Malliakas, M. G. Kanatzidis, T. Nishizaki and N. Kobayashi
Physical review. B, Condensed matter and materials physics, v 78(17)
01 Nov 2008
DOI: https://doi.org/10.1103/PhysRevB.78.174518

Abstract

Materials Science Materials Science, Multidisciplinary Physical Sciences Physics Physics, Applied Physics, Condensed Matter Science & Technology Technology
We report a pronounced peak effect in the magnetization of CoxNbSe2 single crystals with critical temperatures T-c ranging between 7.1 and 5.0 K, and MnxNbSe2 single crystals with critical temperatures down to 3.4 K. We correlate the peak effect in magnetization with the structure of the vortex lattice across the peak-effect region using scanning-tunneling microscopy. Magnetization measurements show that the amplitude of the peak effect in the case of CoxNbSe2 exhibits a nonmonotonic behavior as a function of the Co content, reaching a maximum for concentration of Co of about 0.4 at. % (corresponding to a T-c of 5.7 K) and after that gradually decreasing in amplitude with the increase in the Co content. The normalized value of the peak position H-p/H-c2 has weak dependence on Co concentration. In the case of MnxNbSe2 the features of the peak effect as a function of the Mn content are different and they can be understood in terms of strong pinning.

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Domestic collaboration
International collaboration
Web of Science research areas
Materials Science, Multidisciplinary
Physics, Applied
Physics, Condensed Matter
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