Prando, G. and Profeta, G. and Continenza, A. and Khasanov, R. and Pal, A. and Awana, V. P. S. and uchner, B. B and Sanna, S. (2015) Common effect of chemical and external pressures on the magnetic properties of RCoPO (R = La, Pr, Nd, Sm). II. Physical Review B, 92 (14). 144414-1-144414-9. ISSN 2469-9950

[img]
Preview
PDF - Published Version
Download (774Kb) | Preview

Abstract

We investigate the direct correspondence between Co band ferromagnetism and structural parameters in the pnictide oxides RCoPO for different rare-earth ions (R = La, Pr, Nd, Sm) by means of muon-spin spectroscopy and ab initio calculations, complementing our results published previously [G. Prando et al., Common effect of chemical and external pressures on the magnetic properties of RCoPO (R = La, Pr), Phys. Rev. B 87, 064401 (2013)]. We find that both the transition temperature to the ferromagnetic phase T-C and the volume of the crystallographic unit cell V are conveniently tuned by the R ionic radius and/or external pressure. We report a linear correlation between T-C and V and our ab initio calculations unambiguously demonstrate a full equivalence of chemical and external pressures. As such, we show that R ions influence the ferromagnetic phase only via the induced structural shrinkage without involving any active role from the electronic f degrees of freedom, which are only giving a sizable magnetic contribution at much lower temperatures.

Item Type: Article
Subjects: Physics
Divisions: UNSPECIFIED
Depositing User: Dr. Rajpal Walke
Date Deposited: 20 Sep 2016 06:57
Last Modified: 20 Sep 2016 06:57
URI: http://npl.csircentral.net/id/eprint/1739

Actions (login required)

View Item View Item