Publications related to CdEr2Se4: A New Erbium Spin Ice System in a Spinel Structure

Synthesis and Physical Properties of 3d, 4d and 5d Transition Metal Compounds

In this thesis I study the synthesis and basic physical properties characterization on 3

d

, 4

d

and 5

d

transition metal compounds. Great success has been obtained in 3

d

transition metal compounds, in which the electric states are well localized due t ...

EPFL2017

J1-J2 square lattice antiferromagnetism in the orbitally quenched insulator MoOPO4

László Forró, Henrik Moodysson Rønnow, Arnaud Magrez, Oleg Yazyev, Ivica Zivkovic, Helmuth Berger, Bálint Náfrádi, Lin Yang, Peter Babkevich, Noore Elahi Shaik

We report magnetic and thermodynamic properties of a 4d1 (Mo5+) magnetic insulator MoOPO4 single crystal, which realizes a J1−J2 Heisenberg spin-1/2 model on a stacked square lattice. The specific-heat measurements show a magnetic transition at 16 K which ...

Amer Physical Soc2017

Single crystals of superconducting SmFeAsOHx: Structure and properties

László Forró, Alla Arakcheeva, Richard Gaal, Janusz Andrzej Karpinski, Andrea Pisoni, Sergiy Katrych, Ping Huang, Péter Krisztián Matus

We report the synthesis, structure, and superconducting properties of single crystals of SmFeAsOHx. The crystals were grown at high pressure and high temperature using a cubic anvil technique. H-1-NMR studies confirm the presence of H atoms in the samples. ...

Amer Physical Soc2016

Magnetotransport studies of superconducting Pr4Fe2As2Te1-xO4

László Forró, Richard Gaal, Bálint Náfrádi, Janusz Andrzej Karpinski, Andrea Pisoni, Sergiy Katrych, Péter Szirmai

We report a study of the electrical transport properties of single crystals of Pr(4)Fe(2)As(2)Te(1-)xO(4), a recently discovered iron-based superconductor. Resistivity, Hall effect, and magnetoresistance are measured in a broad temperature range revealing ...

Amer Physical Soc2016

Exchange anisotropy as mechanism for spin-stripe formation in frustrated spin chains

Helmuth Berger

We investigate the spin-stripe mechanism responsible for the peculiar nanometer modulation of the incommensurate magnetic order that emerges between the vector-chiral and the spin-density-wave phase in the frustrated zigzag spin-1/2 chain compound beta-TeV ...

Amer Physical Soc2016

Robust metastable skyrmions and their triangular-square lattice structural transition in a high-temperature chiral magnet

Henrik Moodysson Rønnow, Jonathan White

Skyrmions, topologically protected nanometric spin vortices, are being investigated extensively in various magnets(1-11). Among them, many structurally chiral cubic magnets host the triangular-lattice skyrmion crystal (SkX) as the thermodynamic equilibrium ...

Nature Publishing Group2016

Magnetic model in multiferroic NdFe3(BO3)(4) investigated by inelastic neutron scattering

Henrik Moodysson Rønnow

We performed inelastic neutron scattering measurements on single crystals of NdFe3((BO3)-B-11)(4) to explore the magnetic excitations, to establish the underlying Hamiltonian, and to reveal the detailed nature of hybridization between the 4f and 3d magneti ...

2015

Spin dynamics and magnetoelectric properties of the coupled-spin tetrahedral compound Cu2Te2O5Cl2

Helmuth Berger

We report on the spin dynamics and discovery of magnetoelectricity in the coupled-spin tetrahedral compound Cu2Te2O5Cl2. Te-125 NMR measurements show an anomalous resonance frequency shift and a signal wipe-out phenomenon around the Neel temperature T-N = ...

Amer Physical Soc2014

Cluster-size dependent internal dynamics and magnetic anisotropy of Ho ions in HoM2N@C-80 and Ho2MN@C-80 families (M = Sc, Lu, Y)

Yi Zhang, Jan Gui-Hyon Dreiser

The paramagnetic NMR study of HoM2N@C-80-I-h and Ho2MN@C-80-I-h nitride cluster fullerenes (M = Sc, Lu, Y) reveals strong dependence of Ho-induced paramagnetic shifts (delta(para)) in C-13 NMR spectra on the size of the diamagnetic metal in the cluster. In ...

Royal Society of Chemistry2014

Low-temperature spin dynamics of a valence bond glass in Ba

Henrik Moodysson Rønnow, Julian Piatek

We carried out ac magnetic susceptibility measurements and muon spin relaxation spectroscopy on the cubic double perovskite Ba2YMoO 6, down to 50 mK. Below ∼1 K the muon relaxation is typical of a magnetic insulator with a spin-liquid type ground state, i. ...

Institute of Physics (IoP) and Deutsche Physikalische Gesellschaft2013

CdEr2Se4: A New Erbium Spin Ice System in a Spinel Structure

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Synthesis and Physical Properties of 3d, 4d and 5d Transition Metal Compounds

J1-J2 square lattice antiferromagnetism in the orbitally quenched insulator MoOPO4

Single crystals of superconducting SmFeAsOHx: Structure and properties

Magnetotransport studies of superconducting Pr4Fe2As2Te1-xO4

Exchange anisotropy as mechanism for spin-stripe formation in frustrated spin chains

Robust metastable skyrmions and their triangular-square lattice structural transition in a high-temperature chiral magnet

Magnetic model in multiferroic NdFe3(BO3)(4) investigated by inelastic neutron scattering

Spin dynamics and magnetoelectric properties of the coupled-spin tetrahedral compound Cu2Te2O5Cl2

Cluster-size dependent internal dynamics and magnetic anisotropy of Ho ions in HoM2N@C-80 and Ho2MN@C-80 families (M = Sc, Lu, Y)

Low-temperature spin dynamics of a valence bond glass in Ba

J1-J2 square lattice antiferromagnetism in the orbitally quenched insulator MoOPO4

Synthesis and Physical Properties of 3d, 4d and 5d Transition Metal Compounds

Magnetotransport studies of superconducting Pr4Fe2As2Te1-xO4

Robust metastable skyrmions and their triangular-square lattice structural transition in a high-temperature chiral magnet

Spin dynamics and magnetoelectric properties of the coupled-spin tetrahedral compound Cu2Te2O5Cl2

Low-temperature spin dynamics of a valence bond glass in Ba

Cluster-size dependent internal dynamics and magnetic anisotropy of Ho ions in HoM2N@C-80 and Ho2MN@C-80 families (M = Sc, Lu, Y)

Single crystals of superconducting SmFeAsOHx: Structure and properties

Exchange anisotropy as mechanism for spin-stripe formation in frustrated spin chains

Magnetic model in multiferroic NdFe3(BO3)(4) investigated by inelastic neutron scattering