Magnetic properties of Ruddlesden-Popper phases Sr 3 − x Y x ( Fe 1.25 Ni 0.75 ) O 7 − δ : A combined experimental and theoretical investigation
Journal article, 2018

We present a comprehensive study of the magnetic properties of Sr3-xYx(Fe1.25Ni0.75)O-7(-delta )(0 <= x <= 0.75). Experimentally, the magnetic properties are investigated using superconducting quantum interference device (SQUID) magnetometry and neutron powder diffraction (NPD). This is complemented by a theoretical study based on density functional theory as well as the Heisenberg exchange parameters. Experimental results show an increase in the Ned temperature (T-N) with an increase of Y concentrations and O occupancy. The NPD data reveal that all samples are antiferromagnetically ordered at low temperatures, which has been confirmed by our theoretical simulations for the selected samples. Our first-principles calculations suggest that the three-dimensional magnetic order is stabilized due to finite interlayer exchange couplings. The latter give rise to finite interlayer spin-spin correlations, which disappear above T-N.

Author

Samara Keshavarz

Uppsala University

Sofia Kontos

Uppsala University

Dariusz Wojciech Wardecki

Chalmers, Chemistry and Chemical Engineering, Energy and Material, Environmental Inorganic Chemistry 2

University of Warsaw

Stockholm University

Yaroslav O. Kvashnin

Uppsala University

Manuel Pereiro

Uppsala University

Swarup K. Panda

Uppsala University

Biplab Sanyal

Uppsala University

Olle Eriksson

Örebro University

Uppsala University

Jekabs Grins

Stockholm University

Gunnar Svensson

Stockholm University

Klas Gunnarsson

Uppsala University

Peter Svedlindh

Uppsala University

PHYSICAL REVIEW MATERIALS

2475-9953 (ISSN)

Vol. 2 4 044005

Subject Categories

Inorganic Chemistry

Other Physics Topics

Condensed Matter Physics

DOI

10.1103/PhysRevMaterials.2.044005

More information

Latest update

1/23/2019