uk

mfflogo 

Najít

Semináře

Strouhal's Lecture - Jana Kalbáčová Vejpravová: CURRENT CHALLENGES OF LOW-DIMENSIONAL MAGNETISM
Begin: 03.03.2021, 14:00
Location: Zoom Meeting ID: 922 6355 8960

Jakub Šebesta: Topological Insulators and Magnetic Order
Begin: 04.03.2021, 14:30
Location: ZOOM Meeting ID: 958 0426 7376

Dominik Legut: Thermal expansion and thermal conductivity of novel nuclear fuels
Begin: 05.03.2021, 13:00
Location: ZOOM Meeting ID: 92723439312

Milan Dopita: Instrumentation and experimental facilities of the X-ray laboratory at the DCMP, MFF UK
Begin: 10.03.2021, 14:10
Location: ZOOM Meeting ID: 958 0426 7376

Herwig Michor: Crystal Growth and Studies of Magnetism and Charge Density Wave Physics in Quasi-1D Metals RNiC2
Begin: 17.03.2021, 14:10
Location: ZOOM Meeting ID: 958 0426 7376

 
Title: Herwig Michor: Crystal Growth and Studies of Magnetism and Charge Density Wave Physics in Quasi-1D Metals RNiC2
Number: 8/21
Status: Not exceeded
Begin: Středa, 17.03. 2021, 14:10
Tutor: Vladimír Sechovský
Location: ZOOM Meeting ID: 958 0426 7376


new logo

  

We have a pleasure to invite you to attend the joint seminar
of the Department of Condensed Matter Physics (DCMP)
and the Materials Growth and Measurement Laboratory (MGML) http://mgml.eu.

 

Program

 

Crystal Growth and Studies of Magnetism and Charge Density Wave Physics in Quasi-1D Metals RNiC2

lecture given by:

Herwig Michor

Department of Physics and Astronomy, Uppsala University

 

https://cesnet.zoom.us/j/95804267376
Meeting ID: 958 0426 7376 

on Wednesday, 17.3. 2021 from 14:10 CET (13.10 UTC) 


Passcode will be provided on request at  Tato emailová adresa je chráněna před spamboty, abyste ji viděli, povolte JavaScript

 

Vladimír Sechovský
On behalf of the DCMP and MGML


Abstract 

Ternary carbides RNiC2 (R = La, .. Lu, Y) and RCoC2 (R = Nd, .. Lu) crystallize in the non-centrosymmetric orthorhombic CeNiC2-type structure, space group Amm2. These compounds attracted attention, because of various interesting properties such as charge density wave (CDW) formation related to quasi-one-dimensional electronic features and Fermi surface nesting in RNiC2 with R = Pr, …, Lu, Y, and, finally, a complex interplay of CDW ordering and rare earth magnetism in RNiC2 (see Ref. [1] for a review).

 Here, we report on crystal growth, crystallographic characteristics explored via single crystal XRD, as well as on magnetic and electronic properties studied by a variety of techniques revealing orientation dependent, anisotropic features of RNiC2 (R = Pr, Nd, Gd, Dy, Ho, Y) single crystals. Based on heat capacity, thermal expansion and electrical resistivity studies, we analyse the nature of multiple CDW transitions occurring in RNiC2 crystals (e.g., orthorhombic to incommensurate CDW and incommensurate to commensurate CDW). We discuss their relations to electronic and crystal structure changes and, employing Clausius–Clapeyron and generalized Ehrenfest relations, we discuss resulting pressure and strain dependencies of these transitions as well as an expected elastic interaction between magnetic and CDW order parameters due to the spontaneous magneto-striction revealed by our thermal expansion studies.

[1] V. Babizhetskyy, B. Kotur, V. Levytskyy, H. Michor, Chapter 298: Alloy systems and compounds containing rare earth metals and carbon, in: J.-C.G. Bünzli, V.K. Pecharsky (Eds.), Handbook on the Physics and Chemistry of Rare Earths, Vol. 52, North-Holland, Amsterdam, pp. 1-263. (2017).