UEFISCDI PROJECT
PN-III-P4-ID-PCE-2016-0534
CONTRACT 195/2017
Investigation of the Phase
Diagram of Selected Materials using μSR and μSR under Pressure.
Aim of the project (project
summary and referee report).:
The aim of this work is to
investigate
the magnetic properties of selected compounds using, among
traditional techniques, µSR and
µSR under pressure. In a µSR experiment, a 100 %
polarized muon (spin 1/2 elementary particles) beam is
implanted into the investigated sample where they stop in
interstitial crystallographic positions and their spin
performs Larmor precession around the local field at the place
where they come at rest. Muons disintegrate with a lifetime of
2.2 µs, emitting a positron preferentially along the
muon spin at the moment of disintegration. By registering,
with detectors placed around the sample, the spatial
distribution of the emitted positrons, one can obtain valuable
information about the value of the local field, field
distribution and field dynamics.
Expected
results:
The proposed research topics are of high interest
in both fundamental (investigate the peculiarities of the
phase diagram of the selected compounds and correlate them
with the theoretical predictions) and applied physics. As
said, the methods will be the combination μSR-pressure,
together with classical macroscopic methods and X-Ray
diffraction. Below, the list of principal expected results of
this project is presented.
Here you have information about the team involved in the project (from the
beginning of the project) and an up to date version of
the scientific
report (updated regularly).
Financing agency: Executive unit for financing higher
education, research, development and inovation (UEFISCDI), through
the P4
program (fundamental and frontier research): exploratory
research programs (PCE).
The μSR method.
Introduction to muon
spin rotation and relaxation (μSR)
ISIS Muon
Spectroscopy Training School 2010
Results (publications, ...):
01. Unconventional
magnetic order in the conical state of MnSi.
02.
Suppression
of charge and antiferromagnetic ordering in Ga-DOPED
La0.4Ca0.6MnO3.
03. New
insights into the magnetic textures of MnSi, Journees
de la matiere condensee, 27-31 August, Grenoble, France.
04. On the
Robustness of the MnSi Magnetic Structure Determined by
Muon Spin Rotation
05. Investigation
of the Magnetic Properties of Na0.7CoO2 Prepared by
Electrochemical Reaction.
06. Re-investigation
of the Magneti Phase Diagram of NaxCoO2.
07. muSR
Study on Layered Chromium Perovskites: Srn+1CrnO3n+1 (n=1-3).
08. Internal
Magnetic Field on the Two-Dimensional Triangular Lattice
Formed by Mo3O8 Trimers.
09.
muSR
Study of K2Cr8O16 Under Hydrostatic Pressure.
10. Magnetic
Spin Correlations in the One-dimensional Frustrated
Spin-chain System Ca3Co2O6.
11. XPS
on Gd1-xCexCo2 Intermetallic Compounds
12. Effects
of Y doping on the magnetic properties and magnetocaloric
effect of CeFe2
13. Suppression
of charge and antyiferromagnetic ordering in Ga-dopped
La0.4Ca0.6MnO3
14. Formation
of CoFe2O4/PVA-SiO2 nanocomposites: Effect of diol chain
length on the structure and magnetic properties.
15. Effect
of Zn content on structural, mophological and magnetic
behavior of ZnxCo1-xFe2O4.
16. Influence
of cobalt ferrite on the structure and magnetic properties
of (CoFe2O)x (SiO2-PVA)100-x nanocomposites.
17. Magnetic
phase diagram of K2Cr8O16 clarified by high-pressure muon
spin spectroscopy
Scientific
report 2016-2019
Last revised 16.12.19