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Manipulating the magnetic properties of individual nanoparticles

Applicant Kleibert Armin
Number 160186
Funding scheme Project funding (Div. I-III)
Research institution Paul Scherrer Institut
Institution of higher education Paul Scherrer Institute - PSI
Main discipline Condensed Matter Physics
Start/End 01.12.2015 - 30.11.2019
Approved amount 249'053.00
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Keywords (3)

Magnetic nanoparticles; Photoemission electron microscopy; X-rays

Lay Summary (German)

Lead
Magnetische Nanopartikel sind wichtige Komponenten für Anwendungen in Bereichen wie der Mikroelektronik, der Datenspeicherung, sowie der Bildgebung und Tumorbekämpfung in der Medizin. Der optimale Einsatz von Nanopartikeln in solchen Anwendungen erfordert eine möglichst genaue Kenntnis ihrer grössenabhängigen magnetischen Eigenschaften und der Möglichkeiten ihrer Kontrolle. Trotz intensiver Forschung in den vergangenen Jahrzehnten ist es jedoch noch nicht gelungen, ein ausreichend präzises Verständnis der magnetischen Eigenschaften von realen Nanopartikeln zu entwickeln. Dies ist nicht nur von Nachteil für bereits bestehende Anwendungen, sondern erschwert auch die Entwicklung neuartiger Verfahren, wie zum Beispiel zur kontrollierten, ultraschnellen Ummagnetisierung von Nanopartikeln.
Lay summary

Inhalt und Ziel des Forschungsprojekts

Das vorliegende Projekt hat zum Ziel den Zusammenhang zwischen atomarer Struktur und magnetischen Eigenschaften von metallischen Nanopartikeln, z.B. Eisen, Kobalt oder Nickel, zu untersuchen. Dazu verfolgen wir einen neuartigen, komplementären Ansatz, der die Stärken von Röntgenmikroskopie und höchstauflösender Transmissionselektronenmikroskopie verbindet. Dabei werden die magnetischen Eigenschaften einzelner Nanopartikel mit dem Röntgenmikroskop untersucht und anschliessend deren atomare Struktur im Transmissionselektronenmikroskop experimentell erfasst. In einem zweiten Schritt werden wir untersuchen, ob sich die Magnetisierung von derartigen Nanopartikeln mit Hilfe ultrakurzer Femtosekundenlaserpulse umschalten lässt und welchen Einfluss die Grösse und Struktur der Partikel dabei haben.

 

Wissenschaftlicher und gesellschaftlicher Kontext des Forschungsprojekts

Unsere Experimente werden es erlauben, existierende Modelle zum Magnetismus von Nanopartikeln zu verbessern und damit eine realistische Vorhersage der magnetischen Eigenschaften zu erreichen. Aus diesem Wissen lassen sich Strategien zur gezielten Herstellung von Partikeln mit den, für entsprechende Anwendungen erforderlichen, Eigenschaften entwickeln. Das Umschalten der Magnetisierung von Nanopartikeln mit Hilfe von ultrakurzen Laserpulsen wird zur Entwicklung neuer Anwendungen in der Datenspeicherung und –verarbeitung beitragen.

 

Keywords

Magnetic nanoparticles, X-rays, photoemission electron microscopy, ultrashort laser pulse

Direct link to Lay Summary Last update: 04.06.2015

Responsible applicant and co-applicants

Employees

Name Institute

Publications

Publication
Single-shot time-resolved magnetic x-ray absorption at a free-electron laser
Jal Emmanuelle, Makita Mikako, Rösner Benedikt, David Christian, Nolting Frithjof, Raabe Jörg, Savchenko Tatiana, Kleibert Armin, Capotondi Flavio, Pedersoli Emanuele, Raimondi Lorenzo, Manfredda Michele, Nikolov Ivaylo, Liu Xuan, Merhe Alaa el dine, Jaouen Nicolas, Gorchon Jon, Malinowski Gregory, Hehn Michel, Vodungbo Boris, Lüning Jan (2019), Single-shot time-resolved magnetic x-ray absorption at a free-electron laser, in Physical Review B, 99(14), 144305-144305.
Chirally coupled nanomagnets
Luo Zhaochu, Dao Trong Phuong, Hrabec Aleš, Vijayakumar Jaianth, Kleibert Armin, Baumgartner Manuel, Kirk Eugenie, Cui Jizhai, Savchenko Tatiana, Krishnaswamy Gunasheel, Heyderman Laura J., Gambardella Pietro (2019), Chirally coupled nanomagnets, in Science, 363(6434), 1435-1439.
Electric field control of magnetism in Si 3 N 4 gated Pt/Co/Pt heterostructures
Vijayakumar Jaianth, Bracher David, Savchenko Tatiana M., Horisberger Michael, Nolting Frithjof, Vaz C. A. F. (2019), Electric field control of magnetism in Si 3 N 4 gated Pt/Co/Pt heterostructures, in Journal of Applied Physics, 125(11), 114101-114101.
Full angular dependence of the spin Hall and ordinary magnetoresistance in epitaxial antiferromagnetic NiO(001)/Pt thin films
Baldrati L., Ross A., Niizeki T., Schneider C., Ramos R., Cramer J., Gomonay O., Filianina M., Savchenko T., Heinze D., Kleibert A., Saitoh E., Sinova J., Kläui M. (2018), Full angular dependence of the spin Hall and ordinary magnetoresistance in epitaxial antiferromagnetic NiO(001)/Pt thin films, in Physical Review B, 98(2), 024422-024422.

Collaboration

Group / person Country
Types of collaboration
Richard Evans / University of York Great Britain and Northern Ireland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Veronique Dupuis / Université Lyon 1-CNRS France (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
Ulrich Nowak / Universität Konstanz Germany (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Peter Derlet / Paul Scherrer Insitut Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Jo Verbeeck / University of Antwerp Belgium (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
Roy Chantrell Great Britain and Northern Ireland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication

Scientific events

Active participation

Title Type of contribution Title of article or contribution Date Place Persons involved
MAGNETOFON School 2019 Individual talk Soft x-ray microscopy for studying magnetism and magnetic dynamics at the nanoscale 25.09.2019 Lissabon, Portugal Kleibert Armin;
IC4N 2019 Individual talk Enhanced and Metastable Magnetism Directly Probed in Individual Nanoparticles 02.07.2019 Corfu, Greece Kleibert Armin;
ICFPM19 Talk given at a conference Effect of ultrashort laser pulses on individual Co nanoparticles probed by X-PEEM 29.05.2019 Gijon, Spain Savchenko Tatiana; Nolting Frithjof; Kleibert Armin;
Low-Energy Electrons: Lithography, Imaging and Soft Matter (LEELIS-III) 2018 Individual talk X-ray Photoemission Microscopy as a Versatile Tool for Surface and Interface Investigations at the Nanoscale 11.11.2018 Amsterdam, Netherlands Kleibert Armin;
SFB1214 Symposium 2018 “Anisotropic Nanoparticles – Tailoring Shape, Interactions, and Structures” Individual talk Towards Atomic Level Understanding of Nanoparticle Magnetism by Means of Correlated Single Particle Investigations 26.09.2018 Konstanz, Germany Kleibert Armin;
SPS Annual Meeting Lausanne 2018 Poster Direct correlation of atomic structure and magnetic properties of individual cobalt nanoparticles: experiment vs. simulation 26.08.2018 Lausanne, Switzerland Nolting Frithjof; Savchenko Tatiana; Kleibert Armin;
Clustertreffen 2017 Kaiserlautern Poster Correlation between magnetic properties and structural defects in individual cobalt nanoparticles 24.09.2017 Burg Stahleck, Germany Savchenko Tatiana; Kleibert Armin; Nolting Frithjof;
Summer school on magnetism Bad Honnef 2017 Poster Correlation between magnetic properties and structural defects in individual cobalt nanoparticles 17.09.2017 Bad Honnef, Germany Kleibert Armin; Nolting Frithjof; Savchenko Tatiana;
SPS Meeting 2017 Talk given at a conference Direct investigation of microstructure and magnetism of individual cobalt nanoparticles 21.08.2017 Geneva, Switzerland Kleibert Armin; Nolting Frithjof; Savchenko Tatiana;
MISM Moscow 2017 Individual talk Investigating Enhanced and Metastable Magnetism in Size- and Shape-Selected, Individual Nanoparticles 03.07.2017 Moscow, Russia Kleibert Armin;
MISM Moscow 2017 Poster Combining X-PEEM with HR_STEM for correlating magnetism and structure of individual cobalt nanoparticles 01.07.2017 Moscow, Russia Nolting Frithjof; Kleibert Armin; Savchenko Tatiana;
DPG Frühjahrstagung 2017 Talk given at a conference Direct correlation of microscopic structure and magnetic properties of individual cobalt nanoparticles 19.05.2017 Dresden, Germany Savchenko Tatiana; Kleibert Armin; Nolting Frithjof;
NSLS-II and CFN Users Meeting, Brookhaven National Laboratory 2017 Individual talk Magnetism at the Nanoscale Studied Using X-PEEM at the Swiss Light Source 15.05.2017 Upton, United States of America Kleibert Armin;
Photonics Spring Workshop 2017 Poster Correlation of magnetic and structural properties in individual cobalt nanoparticles studied by means of X-ray photo-emission electron microscopy 10.04.2017 Windisch, Switzerland Kleibert Armin; Nolting Frithjof; Savchenko Tatiana;
SPS Annual Meeting 2016 Poster Investigations on individual cobalt nanoparticles by means of X-ray photo-emission electron microscopy 23.08.2016 Lugano, Switzerland Nolting Frithjof; Savchenko Tatiana; Kleibert Armin;
39th International Conference on Vacuum Ultraviolet and X-ray Physics (VUVX 2016) Poster Correlation of magnetic and structural properties in individual cobalt nanoparticles studied by means of X-ray photo-emission electron microscopy 03.07.2016 Zürich, Switzerland Savchenko Tatiana; Nolting Frithjof; Kleibert Armin;
Swiss NanoConvention 2016 Poster Correlation of magnetic and structural properties in individual cobalt nanoparticles studied by means of X-ray photo-emission electron microscopy 30.06.2016 Basel, Switzerland Kleibert Armin; Nolting Frithjof; Savchenko Tatiana;
9th International Conference on Fine Particle Magnetism 2016 Individual talk Single Particle Characterization Using X‐Ray Photo‐Emission Electron Microscopy 13.06.2016 Gaithersburg, United States of America Kleibert Armin;
Cluster Surface Interaction Workshop 2016 Individual talk Cluster-Surface Interactions on Large Nanoparticles under Soft-Landing Conditions 01.06.2016 Lemont, United States of America Kleibert Armin;


Associated projects

Number Title Start Funding scheme
157743 Molecular Beam Epitaxy deposition system for the SIM beamline at the Swiss Light Source 01.08.2015 R'EQUIP
177020 Probe corrected TEM/STEM for high resolution STEM imaging in materials science 01.09.2018 R'EQUIP
146715 Controlling magnetic anisotropy by interfacial coupling 01.01.2014 Project funding (Div. I-III)
170743 An ultra-high resolution scanning electron microscope (SEM) for low-energy imaging and analysis 01.02.2017 R'EQUIP
141828 NCCR MARVEL: Materials’ Revolution: Computational Design and Discovery of Novel Materials (phase I) 01.05.2014 National Centres of Competence in Research (NCCRs)
146146 Dynamic Behaviour of Artificial Frustrated Spin Systems: Part II 01.05.2013 Project funding (Div. I-III)

Abstract

Magnetic nanoparticles offer to study a rich variety of complex interactions, leading to new insights into fundamental physical properties and enabling to design functionalities in advanced materials. They are relevant in magnetic data storage application and are employed in sensors and medical applications. Understanding the scaling laws covering their properties and resolving the competing energy contributions is important in order to advance this field. Unique phenomena of magnetic nanoparticles are stable single domain states and superparamagnetic behaviour. Despite of considerable experimental and theoretical efforts, a clear understanding of their size-dependent properties has not yet been achieved. This is largely due to a distinct sensitivity of the nanoparticles magnetic properties to their microscopic structure and the details of their interfacial coupling. Here, we propose to tackle this challenge with a novel experimental approach to study the properties of individual magnetic nanoparticles. We will further push the limits of X-ray photoemission electron microscopy for the detection of single nanoparticles taking full advantage of the elemental, chemical, magnetic and electronic sensitivity of spatially resolved X-ray absorption spectroscopy. In this project, we will focus onto single pure and multi-component nanoparticles of 3d transition metals in the size range of 5-25 nm and will address the following two main questions:•What is the interplay of structure, surface and magnetic properties of nanoparticles?•Can this interplay be used to push the all-optical manipulation of magnetism down to nanoparticles?In particular, we will study the effect of external stimuli such as chemical dosing and ultra-short laser pulses onto the static and dynamic magnetic properties of the nanoparticles. The latter is an intriguing new pathway for an alternative “non-magnetic” approach to control spin systems, since it has been discovered that ultrafast laser pulses can reverse the magnetization in certain magnetic materials. The underlying physical mechanism is subject to intense experimental and theoretical research. However, most of these efforts focus so far on extended thin film systems. Within this project we aim to study optical manipulation in magnetic nanoparticles. Besides their particular relevance for applications, we expect that making use of their unique properties will contribute to the understanding of all-optical control in magnetic materials. Another important emphasis is to correlate the microscopic structure with the magnetic properties by measuring the very same, isolated individual nanoparticles with X-ray photoemission electron microscopy and with high resolution transmission electron microscopy. This unique capability will enable to achieve a fundamental understanding of nanoparticle magnetism as well as to provide canonical datasets, which can serve as testing ground for theory.
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