Focus Symposia

Chairs: Ryotaro Arita University of Tokyo, Jairo Sinova Johannes Gutenberg Universität, Igor Mazin George Mason University

The discovery of a new, third fundamental class of collinear magnets with zero net magnetization, but with unconventional spin-polarized band structure, expanded the known ferromagnets and antiferromagnets paradigms. This new magnetic class, termed altermagnets, combines
favorable spintronics properties of ferromagnets and antiferromagnets while also having unique properties of its own, originating from local sublattice anisotropies in direct space connected by spin symmetries. Altermagnets, via their novel functionalities, provide the first science-based physically viable path towards THz tunneling magnetoresistance technology (THz-TMR), leading to a thousandfold increase in efficiency over present ferromagnetic based systems.

Invited Speakers:

Tomas Jungwirth, Institute of Physics Czech Academy of Sciences, Cz
Anna Hellenes, University of Mainz, Germany
Hikaru Watanabe, University of Tokyo, Japan
Rafael Fernandes, University of Minnesota, USA
Sayantika Bhowal, Indian Institute of Technology Bombay, India

Chairs: Pietro Gambardella ETH Zürich, Dongwook Go Forschungszentrum Jülich

The possibility to generate nonequlibrium orbital currents and convert them into spin-orbital torques has generated enormous attention in the field of spintronics. Open fundamental questions concern the orbital texture, the nature of the orbital current, and the mechanisms enabling its conversion into a spin current across various material systems, including topological matter, 2D materials, chiral crystals, and superconductors, in addition to the elemental transition metals. On the practical side, the efficient generation of orbital torques—spin torques derived from orbital currents—offers numerous opportunities for manipulating the magnetization in materials that are both widely available and compatible with industrial deposition processes, such as 3d transition metals and their alloys. Despite earlier theoretical predictions the field has taken off in the last 3 years and it’s expanding fast.

Invited Speakers:

Tatiana G. Rappoport University of Minho, PT
Kyung-Jin Lee  Korea Advanced Institute of Science and Technology,KR
Maria Teresa Mercaldo Università di Salerno, Italy
Federico Mazzola Università di Venezia,Italy
Young-Gwan Choi MPI, Dresden, Germany

Chairs: Silke Buehler-Paschen TU Vienna, Qimiao Si Rice University

This symposium will address strange metallicity in a variety of strongly correlated materials, from heavy fermion compounds to the cuprates and beyond.  Recent years have seen an intense resurgence to the interest and advances on this problem. There is an emerging profile for strange metals beyond their unusual linear-in-temperature electrical resistivity, including enhanced entropy, dynamical scaling, Fermi surface reconstruction and loss of quasiparticles. This symposium will bring together active experimentalists and theorists to highlight the mechanism for strange metallicity, including quantum criticality and electron localization-delocalization, and the capacity of strange metallicity to drive emergent phases ranging from high temperature superconductivity to novel electronic topology.

Invited Speakers:

Haoyu Hu Donostia International Physics Center, Spain
Yong-Baek Kim University of Toronto, Canada
Kazushi Kanoda MPI Stuttgart and University of Tokyo
Diana M. Kirschbaum TU Wien, Austria
Zhi-Xun Shen Stanford University, USA

Chairs: Vidya Madhavan University of Illinois Urbana-Champaign, Jinguang Cheng Chinese Academy of Science

This focus session will feature five invited talks on unconventional superconductivity in the Nickelates, Kagome superconductors, and UTe₂. The talks will highlight recent experimental and theoretical advances in the field. Speakers will present talks on: the inifite-layer nickelates that show superconductivity at ambient pressure; Ruddlesden-Popper bilayer nickelates that were recently found to be superconducting at ~80 K at high pressures; inter-twinned electronic orders in the kagome superconductors and theory of the kagome superconductors which captures much of the experimental phenomenology including the exotic CDW phase; and recent advances in our understanding of the superconducting phase in UTe₂.

Invited Speakers:

Xianhui Chen, University of Science and Technology of China
Ziqiang Wang, Boston College, USA
Priscilla Rosa LANL, USA
John Mitchell, Argonne National Laboratory, USA
Harold Hwang, Stanford University, USA

Chairs: Thomas Schrefl-Danube University Krem and Dagmar Goll Aalen University

Machine learning (ML) and artificial intelligence (AI) methods are having a massive impact on many scientific areas. Ranging from efficient interpolation methods to generative algorithms, AI tools have been proved to enhance productivity and accelerate development. In materials science they enable end-to-end materials/devices design, accelerating the discovery process and reducing the wastes associated with a trial and error approach. In this symposium we will explore how ML and AI is impacting research over many aspects of magnetism. This includes models to predict new magnetic phases and their properties, to analyse multi-dimensional experimental data, to optimize synthesis and growth of novel structures, to optimize microstructures and device architectures.

Invited Speakers:

Gerhard Schneider, Aalen University, DE
Tadakatsu Ohkubo, National Institute for Materials Science(NIMS), Japan
Heike Herper, Uppsala University, SE
Nicola Morley, University of Sheffield, UK
Arbaaz  Khan, McGill University, Canada

Chair: Oliver Gutfleisch TU Darmstadt

Magnets are key enablers for the green energy transition. High performance hard and soft magnets are crucial components of energy-related technologies, such as direct drive wind turbines and e- mobility. They are also important in robotics and automatization, sensors, actuators, and information technology. The magnetocaloric effect (MCE) is the key for new and disruptive solid state-based refrigeration. Energy harvesting can be enabled by ferromagnetic shape memory alloys. The developments of these materials and their related applications depend very much on critical raw materials (CRMs). A prime example are the rare earth elements (REEs), which are essential constituents of the highest performing magnets. Important challenges arise around possibilities of accelerated (ML assisted) alloy substitution and microstructure design strategies, high-end characterisation and correlative multi-property data analysis, advanced processing and recycling routes.

Invited Speakers:

Nora Dempsey, CNRS Grenoble, France
Jinbo Yang, Peking University , China
Gerd Bramerdorfer, Johannes Kepler University Linz, Austria
Thomas Schrefl, Danube University Krems, Austria
Konstantin Skokov, TU Darmstadt, Germany

Chairs: Pierre Seneor CNRS/Thales

This symposium will focus on the exploration and manipulation of magnetism and spin transport as they approach the 2D/interface limit. This boundary offers a unique opportunity to investigate a wide range of phenomena that are typically inaccessible with traditional materials. The symposium will encompass from novel magnetic and spin transport properties emerging at material interfaces (following the example of DMI interactions with metals or the concept of ‘spinterface’ interactions involving molecules or 2D materials) to the inherent potential of 2D materials to as ultimate interfaces and platforms to control magnetism and spin transport.

Invited Speakers:

Josè Lado, Aalto University, Finland
Pascal Ruffieux,  EMPA, Switzerland
Marco Gibertini, Università di Modena e Reggio Emilia, Italy
Marta Galbiati,  University of Valencia, Spain
Mattia Benini, CNR-ISMN, Italy

Chairs: Sang-Wook Cheong Rutgers University, Roberta Sessoli University of Florence

The symposium focuses on new functionalities with chirality, such as CISS (chirality-induced spin selectivity), magneto-chiral effects, chiral phonons, chiral magnons, and chiral tunneling have been recently discovered. The discussion of the newest scientific discoveries will touch also the possible utilization of these for new technological devices.

Invited Speakers:

Takuya Satoh Tokyo Institute of Technology, Japan
Riccardo Comin MIT, USA
Magalí Lingenfelder EPFL, Switzerland
Alessandro Stroppa CNR-SPIN, Italy
Martina Basini ETH, Zurich, Switzerland

Chairs: Denys Makarov HZRD Germany, Massimiliano Marangolo INSP France and Gaspare Varvaro CNR-ISM Italy

Contrary to planar non-collinear structures, curvilinear design enables 3D architectures, which can revolutionize magnetic devices with respect to size, functionality and speed. At present, 3D-shaped magnetic architectures are explored as spin-wave filters, racetrack memory, artificial magnetoelectric materials, and shapeable magneto-electronics, which includes flexible, stretchable and printable magnetic field sensors for the realization of human-machine interfaces, interactive electronics for virtual and augmented reality applications and soft robotics to mention just a few. Very recently, self-healable magnetic field sensors for interactive printed electronics were reported. The presence of the geometrical curvature in a magnetic thin film influences pinning of magnetic domain walls and in this respect it affects the sensitivity of mechanically flexible magnetic field sensors. This is an intimate link between the fundamental topic of curvilinear magnetism and application-oriented activities on shapeable magnetoelectronics.

Invited Speakers:

Alexander Edström, KTH Royal Institute of Technology, Sweden
Damien Faurie Université, Sorbonne Paris Nord, Paris, France
Oliver Gutfleisch, TU Darmstadt, Germany
Carmine Ortix, Salerno University , Italy
Sol H. Jacobsen, Norwegian University of Science and technology, Norway

Chairs: Hans Huebl Walther-Meissner-Institut and Andrii Chumak University of Vienna

The emerging field of Quantum Magnonics strives to harness the advantages and unique properties of magnetic systems and its excitations for applications in the quantum realm. The aim is to control the elementary excitations of magnetic materials to the level of the single quanta, and to interface them coherently to other elementary excitations such as photons or phonons. The recent developments in this field, with proof of concept experiments such as a single-magnon detector and the demonstration of macroscopic magnon quantum states such as Fock states have opened the door for hybrid quantum systems based on magnetic materials. By exploiting hybrid quantum states, levering e.g. on entanglement and squeezing, it is expectedt that future magnonic devices will present enhanced performance and novel functionalities. This Focus Symposium will gather international experts in theory and experiment working at the forefront of the field, and will cover the state of the art, vision, and challenges to be overcome.

Invited Speakers:

Toeno van der Sar, Delft University of Technology, The Netherlands
Tomosato Hioki, University of Tokyo, Japan
Philipp Pirro, Rheinland-Pfälzische Technische Universität, DE
Silvia Viola-Kusminskiy, Institute for Theoretical Condensed Matter, Aachen, DE
Silvia Tacchi,  IOM-CNR, Italy