Project

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Universal aspects of meta-magnetic transitions in frustrated Ising chains

Applicant Zivkovic Ivica
Number 169699
Funding scheme Project funding
Research institution EPFL SB IPHYS CQSL Computational Quantum Science Laboratory)
Institution of higher education EPF Lausanne - EPFL
Main discipline Condensed Matter Physics
Start/End 01.09.2017 - 31.08.2021
Approved amount 262'964.00
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Keywords (3)

Meta-magnetic transitions; Magnetization plateaus; Geometrically frustrated magnets

Lay Summary (French)

Lead
Les transitions de phase sont omniprésentes dans notre monde. Elles sont illustrées aussi bien dans la fonte de la glace que dans les embouteillages, en passant par la brisure de symétrie lors de la naissance de l'Univers.
Lay summary
Ce projet de recherche FNS a pour but d'étudier plusieurs matériaux, dits aimants quantiques, dont la magnétisation se comporte de  manière similaire. En particulier, lorsqu'un champ magnétique est appliqué le long d'une certaine direction d'un de ces cristaux, on observe la même transition de plateau à plateau. Notre objectif est de généraliser ce comportement en proposant un modèle unique décrivant toutes les transitions de phase de ce type.
Direct link to Lay Summary Last update: 27.06.2017

Responsible applicant and co-applicants

Employees

Publications

Publication
Magnetic dynamics across the in-field transition in Ca3Co2O6
Hegde Nagabhushan G., Levatić Ivana, Magrez Arnaud, Rønnow Henrik M., Živković Ivica (2020), Magnetic dynamics across the in-field transition in Ca3Co2O6, in Physical Review B, 102(10), 104418-104418.
Magnetic and structural properties of Ni-substituted magnetoelectric Co4Nb2O9
Papi Hadi, Favre Virgile Yves, Ahmadvand Hossein, Alaei Mojtaba, Khondabi Mohammad, Sheptyakov Denis, Keller Lukas, Kameli Parviz, Živković Ivica, Rønnow Henrik M. (2019), Magnetic and structural properties of Ni-substituted magnetoelectric Co4Nb2O9, in Physical Review B, 100(13), 134408-134408.

Collaboration

Group / person Country
Types of collaboration
Department of Inorganic Chemistry, Universidad del Pais Vasco, Bilbao Spain (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Facility for Crystal Growth, Institute of Physics, EPFL Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
Laboratory for Neutron Scattering and Imaging, PSI Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
Universidade de São Paulo, Instituto de Física, Sao Paolo Brazil (South America)
- in-depth/constructive exchanges on approaches, methods or results
- Research Infrastructure
Institute of Physics, Zagreb Croatia (Europe)
- in-depth/constructive exchanges on approaches, methods or results

Scientific events

Active participation

Title Type of contribution Title of article or contribution Date Place Persons involved
Seminar Individual talk Interconnectivity, geometry and quantum effects in magnetic insulators 26.09.2019 Cardiff, Great Britain and Northern Ireland Zivkovic Ivica;
Quantum Ferromagnetism and Related Phenomena Poster Complex Size-dependence of Oscillating Clusters near Metamagnetic Phase Transitions 06.05.2019 Dresden, Germany Ganesh Hedge Nagabhushan;
SPS Annual Meeting Poster Preliminary Analysis to Understand the Universal Aspects of Metamagnetic Phase Transitions in Ca3Co2O6 28.08.2018 Lausanne, Switzerland Ganesh Hedge Nagabhushan;


Associated projects

Number Title Start Funding scheme
189644 Versatile high sensitivity and throughput magnetometer for quantum, functional and applied materials 01.03.2020 R'EQUIP
162430 URANIUM BASED MOLECULAR MAGNETS: DESIGN, SYNTHESIS AND MAGNETIC STUDIES 01.04.2016 Project funding

Abstract

The search for universality has always been at the forefront of scientific endeavor where seemingly disparate phenomena are elegantly enveloped into a unique framework. We find this from Maxwell's equations, over the Standard model of particle physics, to the concept of second order phase transitions. In this project we seek to investigate universal aspects of meta-magnetic transitions in geometrically frustrated magnets which display magnetization plateaus. There are three main ingredients that characterize the systems that we plan to investigate:i) crystal-field environment of magnetic moments creates a uniaxial anisotropy (Ising spins)ii) strong ferromagnetic coupling along one direction (chains)iii) antiferromagnetic coupling between the chains that form triangular arrangement (frustration)Meta-magnetic transitions in these systems occur when one spin configuration is transformed into another one under the influence of magnetic field. Across different compounds the transitions look very similar yet the processes that govern the transformation are mainly unknown. We propose to investigate those processes using bulk and microscopic methods, in order to eliminate compound-specific features and try to find universal behavior behind them.
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