Publications by Ivica Zivkovic

Fluctuation-driven topological Hall effect in room-temperature itinerant helimagnet Fe3Ga4

Arnaud Magrez, Ivica Zivkovic, Priya Ranjan Baral, Youngro Lee

The topological Hall effect (THE) is a hallmark of a non-trivial geometric spin arrangement in a magnetic metal, originating from a finite scalar spin chirality (SSC). The associated Berry phase is often a consequence of non-coplanar magnetic structures id ...

2025

Dinitrogen Reduction and Functionalization by a Siloxide Supported Thulium-Potassium Complex for the Formation of Ammonia or Hydrazine Derivatives

Rosario Scopelliti, Marinella Mazzanti, Ivica Zivkovic

The dinitrogen (N2) chemistry of lanthanides remains less developed compared to the d-block metals and lanthanide-promoted N2 functionalization chemistry in well-defined lanthanide complexes remains elusive. Here we report the synthesis and characterizatio ...

Wiley-VCH Verlag GmbH2025

High‐Entropy Magnetism of Murunskite

Thomas La Grange, Henrik Moodysson Rønnow, Ivica Zivkovic, Davor Tolj, Rongrong Cai

Murunskite (K 2 FeCu 3 S 4 ) bridges the two known families of high‐temperature superconductors, cuprates and iron‐pnictides, structurally and electronically. Like these families, murunskite exhibits an antiferromagnetic (AF)‐like response with an ordered ...

Wiley2025

Facile N-C bond cleavage and arene reduction by a transient uranium(ii) complex

Andrzej Sienkiewicz, Rosario Scopelliti, Marinella Mazzanti, Ivica Zivkovic

Complexes of uranium(ii) remain extremely rare and their reactivity is practically unexplored. Here we report that the reduction of the heteroleptic bis-aryloxide U(iii) complex [U(κ6-{(tBu2ArO)2Me2-cyclam})I], A, yields a rare and highly reactive U(ii) in ...

2025

Catalytic and stoichiometric stepwise conversion of side-on bound dinitrogen to ammonia mediated by a uranium complex

Rosario Scopelliti, Marinella Mazzanti, Ivica Zivkovic, Lucile Sylvie Danielle Chatelain

The well-defined catalytic conversion of dinitrogen (N2) to ammonia (NH3) by molecular complexes is of fundamental interest and important for providing an atomic-level understanding of reactivity that can be related to industrial and biological nitrogen-fi ...

2025

Structure and Magnetic Properties of a Series of Uranium Bis-Siloxide Complexes

Marinella Mazzanti, Ivica Zivkovic, Farzaneh Fadaei Tirani, Luciano Barluzzi

Despite their synthetic interest and potential attractive properties, the preparation of heteroleptic U(III) complexes containing monodentate ligands remains challenging. Here we report the synthesis, structure and magnetic properties of three heteroleptic ...

WILEY-V C H VERLAG GMBH2025

Cavity-magnon-polariton spectroscopy of strongly hybridized electro-nuclear spin excitations in LiHoF4

Richard Gaal, Henrik Moodysson Rønnow, Ivica Zivkovic, Peter Babkevich

We first present a formalism that incorporates the input-output formalism and the linear response theory to employ cavity-magnon-polariton coupling as a spectroscopic tool for investigating strongly hybridized electro-nuclear spin excitations. A microscopi ...

Nature Research2024

Dynamic Jahn-Teller effect in the strong spin-orbit coupling regime

Oleg Yazyev, Henrik Moodysson Rønnow, Ivica Zivkovic, Davor Tolj, Ravi Yadav, Jana Pásztorová, Jian Rui Soh

Exotic quantum phases, arising from a complex interplay of charge, spin, lattice and orbital degrees of freedom, are of immense interest to a wide research community. A well-known example of such an entangled behavior is the Jahn-Teller effect, where the l ...

Nature Research2024

Dynamics of K2Ni2(SO4)3 governed by proximity to a 3D spin liquid model

Arnaud Magrez, Henrik Moodysson Rønnow, Ivica Zivkovic, Virgile Yves Favre, Jian Rui Soh

Quantum spin liquids (QSLs) have become a key area of research in magnetism due to their remarkable properties, such as long-range entanglement, fractional excitations, and topologically protected phenomena. Recently, the search for QSLs has expanded into ...

Nature Research2024

Weyl metallic state induced by helical magnetic order

Henrik Moodysson Rønnow, Ivica Zivkovic, Jan Hugo Dil, Jian Rui Soh, Xupeng Yang

In the rapidly expanding field of topological materials there is growing interest in systems whose topological electronic band features can be induced or controlled by magnetism. Magnetic Weyl semimetals, which contain linear band crossings near the Fermi ...

Nature Portfolio2024

Magneto-optical response of the magnetic semiconductors EuCd2X2 (X =P, As, Sb)

Ivica Zivkovic, Jan Hugo Dil, Michele Puppin, Fei Guo

In this study, we identify EuCd2X2 (for X = P, As, Sb) as a series of magnetic semiconductors. We examine how the band gap of the series responds to X changing from phosphorus (P), to arsenic (As), and finally antimony (Sb). We characterize the samples usi ...

2024

High-Temperature Phase Transitions Preceding the Decomposition of Mixed Valence Aluminum Titanate Pseudobrookite

Arnaud Magrez, Henrik Moodysson Rønnow, Ivica Zivkovic, Davor Tolj, Yong Liu

Dark blue single crystals of Al1.753+Ti1.04+Ti0.253+O5 were grown with a novel synthesis method based on the reaction of a Ti3+/Ti4+-containing langbeinite melt and porous alpha-alumina crucible. The obtained needles crystallize in the pseudobrookite struc ...

Amer Chemical Soc2024

Spectroscopic signatures and origin of hidden order in Ba2MgReO6

Oleg Yazyev, Henrik Moodysson Rønnow, Ivica Zivkovic, Davor Tolj, Jana Pásztorová

Clarifying the underlying mechanisms that govern ordering transitions in condensed matter systems is crucial for comprehending emergent properties and phenomena. While transitions are often classified as electronically driven or lattice-driven, we present ...

Nature Research2024

Siloxide tripodal ligands as a scaffold for stabilizing lanthanides in the +4 oxidation state

Rosario Scopelliti, Marinella Mazzanti, Ivica Zivkovic, Fang-Che Hsueh

Synthetic strategies to isolate molecular complexes of lanthanides, other than cerium, in the +4 oxidation state remain elusive, with only four complexes of Tb(iv) isolated so far. Herein, we present a new approach for the stabilization of Tb(iv) using a s ...

Royal Soc Chemistry2024

A trinuclear metallasilsesquioxane of uranium(III)

Rosario Scopelliti, Marinella Mazzanti, Ivica Zivkovic, Farzaneh Fadaei Tirani, Nadir Jori

The silsesquioxane ligand (Bu-i)(7)Si7O9(OH)(3) ((POSSH3)-P-iBu) is revealed as an attractive system for the assembly of robust polynuclear complexes of uranium(III) and allowed the isolation of the first example of a trinuclear U(III) complex ([U-3((POSS) ...

Royal Society of Chemistry2024

Reinvestigation of the Crystal Structure and Magnetic Properties of M(vo)2(po4)24h2o and Ni0.5(vo)2(po4)21.5h2o (m = Ni2+, Co2+) Compounds

Ivica Zivkovic

In today's technology, the need for data-and energy storage devices with a high efficiency and capacity, as well as a high writing speed for the former is ever increasing. For such applications, materials with a magnetic nature, i.e. Ferro-, Ferri-and Anti ...

2024

Synthesis, structure and redox properties of single-atom bridged diuranium complexes supported by aryloxides

Rosario Scopelliti, Marinella Mazzanti, Ivica Zivkovic, Luciano Barluzzi, Fang-Che Hsueh

Single-atom (group 15 and group 16 anions) bridged dimetallic complexes of low oxidation state uranium provide a convenient route to implement multielectron transfer and promote magnetic communication in uranium chemistry, but remain extremely rare. Here w ...

ROYAL SOC CHEMISTRY2024

Diffuse spin waves and classical spin liquid behavior in the kagome antiferromagnet chromium jarosite, KCr3(OD)6(SO4)2

Ivica Zivkovic, Sofie Janas

The dynamics of the S = 3/2 kagome antiferromagnet chromium jarosite, KCr3(OD)(6)(SO4)(2), was studied using high-resolution neutron time-of-flight spectroscopy on a polycrystalline sample with a nearly stoichiometric magnetic lattice [2.8(2)% Cr vacancies ...

Amer Physical Soc2023

Electrical and Magnetic Properties of FeGa3 with Antisite Disorder

Henrik Moodysson Rønnow, Ivica Zivkovic, Ellen Fogh

We investigated the electronic and magnetic ground states of the cage compound FeGa3 under the presence of Fe antisite disorder (namely as Fe0.258Ga0.742) by x-ray diffraction (XRD), Mössbauer spectroscopy (MS), magnetization and electrical resistivity. Ou ...

2023

Pressure dependence of superconducting properties of layered BaNi2P2

Richard Gaal, Henrik Moodysson Rønnow, Ivica Zivkovic, Youngro Lee

The discovery of unconventional superconductivity in a broad class of iron-based materials invoked extensive research on the corresponding compounds of other transition metals. For instance, BaNi2P2 exhibits a superconducting transition with a critical tem ...

Elsevier2023