Related Experiment Videos
XMCD study of the Ruddlesden-Popper Phase La1.2Nd0.2Sr1.6Mn2O7
F Weigand1, E Goering, J Geissler
1Lehrstuhl für Experimentelle Physik IV, Universität Würzburg, Germany. frank_w@physik.uni-wuerzburg.de
Journal of Synchrotron Radiation
|August 22, 2001
Summary
X-ray Magnetic Circular Dichroism (XMCD) reveals significant spin-polarization in La1.2Nd0.2Sr1.6Mn2O7. Nd 5d-states show a large orbital moment, while Mn K-edge indicates Mn 4p-band polarization.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Magnetism
Background:
- Ruddlesden-Popper phases are complex oxides with interesting magnetic properties.
- Understanding electronic and magnetic behavior in these materials is crucial for technological applications.
Purpose of the Study:
- To investigate the magnetic properties of the Ruddlesden-Popper phase La1.2Nd0.2Sr1.6Mn2O7.
- To probe the electronic states and their spin polarization using X-ray Magnetic Circular Dichroism (XMCD).
Main Methods:
- X-ray Magnetic Circular Dichroism (XMCD) measurements.
- Measurements performed on a powder sample of La1.2Nd0.2Sr1.6Mn2O7.
- Spectra acquired at Mn K, La, and Nd L2,L3 edges at low temperatures and two magnetic fields (1T and 0.2T).
Main Results:
- XMCD analysis revealed a large orbital moment in Nd 5d-states and significant spin-polarization of the La 5d-band at 1T.
- A XMCD signal at the Mn K-edge indicated polarization of the Mn 4p-band.
- At 0.2T, all XMCD signals were reduced by approximately half, correlating with lower magnetization, and the Nd L2 edge signal disappeared.
Conclusions:
- The study demonstrates the utility of XMCD in characterizing complex magnetic interactions in Ruddlesden-Popper phases.
- The results highlight distinct contributions of Nd, La, and Mn elements to the overall magnetic behavior of the material.