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STM studies of CoxNbSe2 and MnxNbSe2

M Iavarone1, G Karapetrov1, R Di Capua2,3, A E Koshelev1, D Rosenmann1, H Claus1, W K Kwok1, T Nishizaki4 and N Kobayashi4

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Cobalt and Manganese intercalated NbSe2 single crystals have been synthesized and characterized by DC magnetization and scanning tunnelling microscopy (STM) at low temperatures. We observed a pronounced peak effect in magnetization for both Co and Mn intercalated samples that we further investigated by low temperature STM. A structural phase transition of the vortex lattice (VL) has been observed for applied magnetic fields corresponding to the peak in magnetization.


PACS

74.25.Ha Magnetic properties

74.25.Qt Vortex lattices, flux pinning, flux creep

81.05.Tp Fullerenes and related materials

74.70.Wz Fullerenes and related materials

64.70.K- Solid–solid transitions

Subjects

Superconductivity

Condensed matter: structural, mechanical & thermal

Dates

Issue 5 (2009)



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