Thomas Lorenz

activity

19962019

most citedThermal conductivity via magnetic excitations in spin-chain materials

137 citations · 979 across the 32 of their papers we have counts for

collaborators

Showing cond-mat.str-elShow all

25 papers · 1 filter

cond-mat.str-el2019★ 33 cited

Interplay of electronic and spin degrees in ferromagnetic SrRuO $_{3}$ : anomalous softening of magnon gap and stiffness

Kevin Jenni, Stefan Kunkemöller, Daniel Brüning +7

The magnon dispersion of ferromagnetic SrRuO $_{3}$ was studied by inelastic neutron scattering experiments on single crystals as function of temperature. Even at low temperature the…

cond-mat.str-el2019★ 58 cited

Spin-orbit entangled j=1/2 moments in Ba $_{2}$ CeIrO $_{6}$ -- a frustrated fcc quantum magnet

A. Revelli, C. C. Loo, D. Kiese +16

We establish the double perovskite Ba $_{2}$ CeIrO $_{6}$ as a nearly ideal model system for j=1/2 moments, with resonant inelastic x-ray scattering indicating a deviation of less than 1%…

cond-mat.str-el2016★ 11 cited

Strong magnetoelastic coupling at the transition from harmonic to anharmonic order in NaFe(WO $_{4}$ ) $_{2}$ with 3d $^{5}$ configuration

S. Holbein, M. Ackermann, L. Chapon +9

The crystal structure of the double tungstate NaFe(WO $_{4}$ ) $_{2}$ arises from that of the spin-driven multiferroic MnWO $_{4}$ by inserting non-magnetic Na layers. NaFe(WO $_{4}$ ) $_{2}$ exhib…

cond-mat.str-el2015★ 18 cited

Suppression of Pauling's Residual Entropy in Dilute Spin Ice (Dy $_{1 - x}$ Y $_{x}$ ) $_{2}$ Ti $_{2}$ O $_{7}$

S. Scharffe, O. Breunig, V. Cho +4

Around 0.5 K, the entropy of the spin-ice Dy $_{2}$ Ti $_{2}$ O $_{7}$ has a plateau-like feature close to Pauling's residual entropy derived originally for water ice, but an unambiguous quan…

cond-mat.str-el2014★ 23 cited

Low-temperature ordered phases of the spin- $\frac{1}{2}$ XXZ chain system Cs $_{2}$ CoCl $_{4}$

O. Breunig, M. Garst, A. Rosch +6

In this study the magnetic order of the spin-1/2 XXZ chain system Cs $_{2}$ CoCl $_{4}$ in a temperature range from 50 mK to 0.5 K and in applied magnetic fields up to 3.5 T is investigat…

cond-mat.str-el2014★ 14 cited

Anisotropy study of multiferroicity in the pyroxene NaFeGe $_{2}$ O $_{6}$

M. Ackermann, L. Andersen, T. Lorenz +2

We present a study of the anisotropy of the dielectric, magnetic and magnetoelastic properties of the multiferroic clinopyroxene NaFeGe $_{2}$ O $_{6}$ . Pyroelectric currents, dielectric…

cond-mat.str-el2014★ 15 cited

Magnetoelectric properties of $A_{2}$ [FeCl $_{5}$ (H $_{2}$ O)] with $A =$ K, Rb, Cs

M. Ackermann, T. Lorenz, P. Becker +1

The compounds $A_{2}$ [FeCl $_{5}$ (H $_{2}$ O)] with $A =$ K, Rb, Cs are identified as new linear magnetoelectric materials. We present a detailed investigation of their linear magnetoelectri…

cond-mat.str-el2014★ 15 cited

Heat transport of the spin-ice materials Ho $_{2}$ Ti $_{2}$ O $_{7}$ and Dy $_{2}$ Ti $_{2}$ O $_{7}$

S. Scharffe, G. Kolland, M. Valldor +3

The elementary excitations of the spin-ice materials Ho $_{2}$ Ti $_{2}$ O $_{7}$ and Dy $_{2}$ Ti $_{2}$ O $_{7}$ in zero field can be described as independent magnetic monopoles. We investigate the in…

cond-mat.str-el2014★ 21 cited

Substitution effects on the temperature vs. magnetic-field phase diagrams of the quasi-1D effective Ising spin-1/2 chain system BaCo $_{2}$ V $_{2}$ O $_{8}$

S. K. Niesen, O. Breunig, S. Salm +3

BaCo $_{2}$ V $_{2}$ O $_{8}$ is a one-dimensional antiferromagnetic spin-1/2 chain system with pronounced Ising anisotropy of the magnetic exchange. Due to finite interchain interactions lon…

cond-mat.str-el2013★ 43 cited

Thermodynamic properties of the new multiferroic material (NH $_{4}$ ) $_{2}$ [FeCl $_{5}$ (H $_{2}$ O)]

M. Ackermann, D. Brüning, T. Lorenz +2

(NH $_{4}$ ) $_{2}$ [FeCl $_{5}$ (H $_{2}$ O)], a member of the family of antiferromagnetic $A_{2}$ [Fe $X_{5}$ (H $_{2}$ O)] compounds ( $X$ = halide ion, $A$ = alkali metal or ammonium ion) is classified as…

cond-mat.str-el2013★ 53 cited

The spin- $\frac{1}{2}$ XXZ chain system Cs $_{2}$ CoCl $_{4}$ in a transverse magnetic field

O. Breunig, M. Garst, E. Sela +5

Comparing high-resolution specific heat and thermal expansion measurements to exact finite-size diagonalization, we demonstrate that Cs $_{2}$ CoCl $_{4}$ for a magnetic field along the c…

cond-mat.str-el2013★ 46 cited

Magnetic phase diagrams, domain switching and a quantum phase transition of the quasi-1D Ising-like antiferromagnet BaCo2V2O8

S. K. Niesen, G. Kolland, M. Seher +5

In the effective Ising spin-1/2 antiferromagnetic chain system BaCo $_{2}$ V $_{2}$ O $_{8}, t h e ma g n e t i c - f i e l d in f l u e n ce i s hi g h l y ani so t r o p i c . F or ma g n e t i c f i e l d s a l o n g t h ee a sy a x i s$ c$, t…

cond-mat.str-el2012★ 34 cited

Thermal Conductivity and Specific Heat of the Spin-Ice Compound Dy $_{2}$ Ti $_{2}$ O $_{7}$ : Experimental Evidence for Monopole Heat Transport

G. Kolland, O. Breunig, M. Valldor +3

Elementary excitations in the spin-ice compound Dy $_{2}$ Ti $_{2}$ O $_{7}$ can be described as magnetic monopoles propagating independently within the pyrochlore lattice formed by magnetic…

cond-mat.str-el2010★ 20 cited

Magnetostrictive Neel ordering of the spin-5/2 ladder compound BaMn2O3: distortion-induced lifting of geometrical frustration

M. Valldor, O. Heyer, A. C. Komarek +3

The crystal structure and the magnetism of BaMn $_{2}$ O $_{3}$ have been studied by thermodynamic and by diffraction techniques using large single crystals and powders. BaMn $_{2}$ O $_{3}$ is…

cond-mat.str-el2009★ 26 cited

Spinon localization in the heat transport of the spin-1/2 ladder compound (C $_{5}$ H $_{12}$ N) $_{2}$ CuBr $_{4}$

A. V. Sologubenko, T. Lorenz, J. A. Mydosh +4

We present experiments on the magnetic field-dependent thermal transport in the spin-1/2 ladder system (C $_{5}$ H $_{12}$ N) $_{2}$ CuBr $_{4}$ . The thermal conductivity $κ (B)$ is only weakly…

cond-mat.str-el2009★ 16 cited

Phase diagram and isotope effect in (PrEu)_0.7Ca_0.3CoO_3 cobaltites exhibiting spin-state transitions

A. V. Kalinov, O. Yu. Gorbenko, A. N. Taldenkov +11

We present the study of magnetization, thermal expansion, specific heat, resistivity, and a.c. susceptibility of (Pr $_{1 - y}$ Eu $_{y}$ ) $_{0.7}$ Ca $_{0.3}$ CoO $_{3}$ cobaltites. The measure…

cond-mat.str-el2009★ 10 cited

Thermal expansion of the spin-1/2 Heisenberg-chain compound Cu(C $_{4}$ H $_{4}$ N $_{2}$ )(NO $_{3}$ ) $_{2}$

J. Rohrkamp, M. D. Phillips, M. M. Turnbull +1

Compounds containing magnetic subsystems representing simple model spin systems with weak magnetic coupling constants are ideal candidates to test theoretical predictions for the g…

cond-mat.str-el2007★ 47 cited

Field-dependent thermal transport in the Haldane chain compound NENP

A. V. Sologubenko, T. Lorenz, J. A. Mydosh +3

We present a study of the magnetic field-dependent thermal transport in the spin S=1 chain material Ni(C2H8N2)2NO2(ClO4) (NENP). The measured thermal conductivity is found to be ve…

cond-mat.str-el2006★ 137 cited

Thermal conductivity via magnetic excitations in spin-chain materials

A. V. Sologubenko, T. Lorenz, H. R. Ott +1

We discuss the recent progress and the current status of experimental investigations of spin-mediated energy transport in spin-chain and spin-ladder materials with antiferromagneti…

cond-mat.str-el2006★ 16 cited

Magnetoelastic coupling across the metamagnetic transition in Ca $_{2 - x}$ Sr $_{x}$ RuO $_{4}$ (0.2 < x < 0.5)

J. Baier, P. Steffens, O. Schumann +11

The magnetoelastic coupling in Ca $_{1.8}$ Sr $_{0.2}$ RuO $_{4}$ and in Ca $_{1.5}$ Sr $_{0.5}$ RuO $_{4}$ has been studied combining high-resolution dilatometer and diffraction techniques. Bot…

cond-mat.str-el2006★ 10 cited

Uniaxial pressure dependencies of the phase transitions in GdMnO $_{3}$

J. Baier, D. Meier, K. Berggold +4

GdMnO $_{3}$ shows an incommensurate antiferromagnetic order below $≃ 42$ K, transforms into a canted A-type antiferromagnet below $≃ 20$ K, and for finite magnetic fields a…

cond-mat.str-el2001★ 15 cited

Heat transport in SrCu_2(BO_3)_2 and CuGeO_3

M. Hofmann, T. Lorenz, A. Freimuth +5

In the low dimensional spin systems $S r C u_{2} (B O_{3})_{2}$ and $C u G e O_{3}$ the thermal conductivities along different crystal directions show pronounced double-peak structures and strongly…

cond-mat.str-el2001★ 69 cited

Strong damping of phononic heat current by magnetic excitations in SrCu_2(BO_3)_2

M. Hofmann, T. Lorenz, G. S. Uhrig +5

Measurements of the thermal conductivity as a function of temperature and magnetic field in the 2D dimer spin system SrCu $_{2}$ (BO $_{3}$ ) $_{2}$ are presented. In zero magnetic field the…

cond-mat.str-el1997★ 10 cited

Revival of the spin-Peierls transition in Cu_xZn_(1-x)GeO_3 under pressure

M. Fischer, P. H. M. van Loosdrecht, P. Lemmens +8

Pressure and temperature dependent susceptibility and Raman scattering experiments on single crystalline Cu_xZn_(1-x)GeO_3 have shown an unusually strong increase of the spin-Peier…

Interplay of electronic and spin degrees in ferromagnetic SrRuO3​: anomalous softening of magnon gap and stiffness

Spin-orbit entangled j=1/2 moments in Ba2​CeIrO6​ -- a frustrated fcc quantum magnet

Strong magnetoelastic coupling at the transition from harmonic to anharmonic order in NaFe(WO4​)2​ with 3d5 configuration

Suppression of Pauling's Residual Entropy in Dilute Spin Ice (Dy1−x​Yx​)2​Ti2​O7​

Low-temperature ordered phases of the spin-21​ XXZ chain system Cs2​CoCl4​

Anisotropy study of multiferroicity in the pyroxene NaFeGe2​O6​

Magnetoelectric properties of A2​[FeCl5​(H2​O)] with A= K, Rb, Cs

Heat transport of the spin-ice materials Ho2​Ti2​O7​ and Dy2​Ti2​O7​

Substitution effects on the temperature vs. magnetic-field phase diagrams of the quasi-1D effective Ising spin-1/2 chain system BaCo2​V2​O8​

Thermodynamic properties of the new multiferroic material (NH4​)2​[FeCl5​(H2​O)]

The spin-21​ XXZ chain system Cs2​CoCl4​ in a transverse magnetic field