Naslov
Magnetic ordering of Co0.33NbS2 under pressure

Autori
Popčević, Petar ; Smiljanić, Igor ; Bilušić, Ante ; Smontara, Ana ; Batistić, Ivo ; Berger, H. ; Jačimović, J. ; Forró, L. ; Barišić, Neven ; Tutiš, Eduard

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
"Physics of Low-Dimensional Conductors: Problems and Perspectives" Program and Abstracts / Balog, Ivan ; Barišić, Osor S. ; Smontara, Ana - Zagreb : Institut za fiziku, 2012, 56-56

ISBN
978-953-7666-08-8

Skup
International Conference "Physics of Low- Dimnesional Conductors: Problems and Perspectives"

Mjesto i datum
Zagreb, Hrvatska, 25.03.2012. - 28.03.2012

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Co0.33NbS2; pressure; magnetic ordering

Sažetak
Magnetic orderings driven by competing interactions on a frustrated lattice usually result in complex phase diagrams that are challenging to study. Intercalated Co atoms in the layered NbS2 matrix form a triangular lattice and at ambient pressure Co0.33NbS2 exhibit an antiferromagnetic like order at 26 K. While the parent compound 2H-NbS2 exhibits a pressure independent superconducting transition at 6 K, the hydrostatic pressure suppresses the magnetic ordering temperature in the Co0.33NbS2}; ; ; ; ; ; ; ; ; ; ; ; to zero at 2 GPa. Disappearance of magnetic ordering with pressure has been recently confirmed with elastic neutron scattering experiment. The ordering mechanism is not yet fully understood, although those scenarios that include super- exchange and RKKY interactions are natural candidates. At pressures above 3 GPa a minimum in the resistivity appears followed by a logarithmic rise of the resistivity with lowering temperature. This indicates Kondo screening of Co magnetic moments leading to formation of Kondo spin liquid. Notably, no superconductivity was found between these two phases down to dilution temperatures.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

Napomena
The poster was presented by Petar Popčević. This work was supported in part by the UKF project (65/10) “New electronic states driven by frustration in layered materials”.

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