Microscopic changes in HoNi₂B₂C due to thermal treatment and its effect on superconductivity

Title data

Dertinger, Armin ; Dinnebier, Robert E. ; Kreyssig, A. ; Stephens, Peter W. ; Pagola, Silvina ; Loewenhaupt, M. ; van Smaalen, Sander ; Braun, Hans F.:
Microscopic changes in HoNi₂B₂C due to thermal treatment and its effect on superconductivity.
In: Physical Review B. Vol. 63 (2001) Issue 18 . - No. 184518.
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.63.184518

Official URL:

Abstract in another language

The low-temperature properties of HoNi2B2C strongly depend on its thermodynamic state established via thermal treatment. We present high resolution x-ray powder diffraction data taken on a pair of polycrystalline samples with identical chemical composition (HoNi2B2.1C) but annealed at different temperatures, namely, at 800 and at 1100 °C. Their superconducting transition temperatures differ by more than 10%. Rietveld refinement and difference Fourier analysis reveal subtle differences in the atomic parameters and in the electron density on the carbon site. Furthermore, a new atomic site can be identified for both samples, which is partially occupied with the lighter atoms boron or carbon.

Further data

Item Type:	Article in a journal
Refereed:	Yes
Institutions of the University:	Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Former Professors > Professor Experimental Physics V - Univ.-Prof. Dr. Hans Braun Faculties > Faculty of Mathematics, Physics und Computer Science > Group Material Sciences > Chair Crystallography Faculties > Faculty of Mathematics, Physics und Computer Science > Group Material Sciences > Chair Crystallography > Chair Crystallography - Univ.-Prof. Dr. Sander van Smaalen Faculties Faculties > Faculty of Mathematics, Physics und Computer Science Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Former Professors Faculties > Faculty of Mathematics, Physics und Computer Science > Group Material Sciences
Result of work at the UBT:	Yes
DDC Subjects:	500 Science > 530 Physics
Date Deposited:	22 Mar 2016 09:39
Last Modified:	26 Aug 2022 07:08
URI:	https://eref.uni-bayreuth.de/id/eprint/31965