<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>In this paper, we address the issue of possible quadrupole ordering in RCu2Ge2 compounds. In the literature, there are reports on anomalous behaviour of lattice parameters, however, lack of high quality data makes the relevant analysis dubious. Therefore, we attempt to perform precise, non-ambient XRD measurements within 12–300 K temperature range. Our results confirm peculiar temperature behaviour of the c-lattice parameter that exhibits a well defined minimum at about 60–120 K for majority of investigated compounds. However, in contrast to the literature, the anomalous behaviour does not exhibit discontinuities. On the other hand, such behaviour has been evidenced for La-based compounds (LaCu2Ge2 and LaNi2Ge2), where the 4f orbitals are unoccupied.</p></abstract>

In this paper, we address the issue of possible quadrupole ordering in RCu2Ge2 compounds. In the literature, there are reports on anomalous behaviour of lattice parameters, however, lack of high quality data makes the relevant analysis dubious. Therefore, we attempt to perform precise, non-ambient XRD measurements within 12–300 K temperature range. Our results confirm peculiar temperature behaviour of the c-lattice parameter that exhibits a well defined minimum at about 60–120 K for majority of investigated compounds. However, in contrast to the literature, the anomalous behaviour does not exhibit discontinuities. On the other hand, such behaviour has been evidenced for La-based compounds (LaCu2Ge2 and LaNi2Ge2), where the 4f orbitals are unoccupied.

Anomalous structural properties of some RCu2Ge2 compounds (R = La, Gd-Tm)

Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, Mickiewicza 30, 30-059, Kraków, Poland

M. Smoluchowski Institute of Physics, Jagiellonian University, Reymonta 4, 30-059, Kraków, Poland

Materials Science-Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"Anomalous structural properties of some RCu2Ge2 compounds (R = La, Gd-Tm)"}

In this paper, we address the issue of possible quadrupole ordering in RCu2Ge2 compounds. In the literature, there are reports on anomalous behaviour of...

Anomalous structural properties of some RCu2Ge2 compounds (R = La, Gd-Tm)

Pubblicato online: 15 dic 2013

Pagine: 495 - 500

DOI: https://doi.org/10.2478/s13536-013-0136-2

Parole chiave
rare-earth intermetallics, non-ambient X-ray diffraction

© 2013 Wroclaw University of Technology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Anomalous structural properties of some RCu2Ge2 compounds (R = La, Gd-Tm)

Pubblicato online: 15 dic 2013

Pagine: 495 - 500

DOI: https://doi.org/10.2478/s13536-013-0136-2

Parole chiaverare-earth intermetallics, non-ambient X-ray diffraction

© 2013 Wroclaw University of Technology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Parole chiave
rare-earth intermetallics, non-ambient X-ray diffraction