Roland Würschum

Univ.-Prof. Dipl.-Phys. Dr.rer.nat.

20002021
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Research Output 2000 2019

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Article
2019

Disordered and Frustrated Magnetization in Coated MnFe2O4 Nanoparticles Prepared by Microwave Plasma Synthesis

Nadeem, K., Kamran, M., Krenn, H., Szabo, D. V., Brossmann, U. & Würschum, R., 2019, In : Solid state phenomena. 289, p. 127-133

Research output: Contribution to journalArticleResearchpeer-review

Open Access
Kinetics
Chemical analysis
Reaction rates
Precipitates
Heat treatment

Magneto-Ionic Switching of Superparamagnetism

Gößler, M., Albu, M., Klinser, G., Steyskal, E-M., Krenn, H. & Würschum, R., 1 Oct 2019, In : Small. 8 p., 1904523 .

Research output: Contribution to journalArticleResearchpeer-review

Open Access
Superparamagnetism
Magnetism
Sorption
Hydrogen
Magnetoelectronics

Operando monitoring of charging-induced defect formation in battery electrodes by positrons

Klinser, G., Krenn, H., Koller, S. & Würschum, R., 2019, In : Applied Physics Letters. 114, 1, p. 013905 013905.

Research output: Contribution to journalArticleResearchpeer-review

charging
electric batteries
positrons
electrodes
defects

Redox processes in sodium vanadium phosphate cathodes – insights from operando magnetometry

Klinser, G., Zettl, R., Wilkening, H. M. R., Krenn, H., Hanzu, I. & Würschum, R., 2019, In : Physical Chemistry Chemical Physics.

Research output: Contribution to journalArticleResearchpeer-review

Open Access
2018

Charging processes in the cathode LiNi0.6Mn0.2Co0.2O2 as revealed by operando magnetometry

Klinser, G., Stückler, M., Krenn, H., Koller, S., Goessler, W., Krenn, H. & Würschum, R., 2018, In : Journal of power sources. 396, p. 791-795 5 p.

Research output: Contribution to journalArticleResearchpeer-review

Diffusion-reaction model for positron trapping and annihilation at spherical extended defects and in precipitate-matrix composites

Würschum, R., Resch, L. & Klinser, G., 2018, In : Physical Review / B. 97, p. 224108-1 - 11 11 p., 224108.

Research output: Contribution to journalArticleResearchpeer-review

Enhanced Charging-Induced Resistance Variations of Nanoporous Gold by Dealloying in Neutral Silver Nitrate Solution

Steyskal, E-M., Seidl, M., Simic, S. & Würschum, R., 2 Oct 2018, In : Langmuir. 34, p. 13110-13115

Research output: Contribution to journalArticleResearchpeer-review

Hydrogen-induced plasticity in nanoporous palladium

Gößler, M., Steyskal, E-M., Stütz, M., Enzinger, N. & Würschum, R., 2018, In : Beilstein Journal of Nanotechnology . 9, p. 3013 3024 p.

Research output: Contribution to journalArticleResearchpeer-review

Open Access

Kinetics of vacancy annealing upon time-linear heating applied to dilatometry

Enzinger, R., Neubauer, C., Kotzurek, J., Sprengel, W. & Würschum, R., 2018, In : Journal of Materials Science. 53, p. 2758-2765

Research output: Contribution to journalArticleResearchpeer-review

Open Access
Vacancies
Annealing
Heating
Kinetics
Grain boundaries
2017

Dealloying progress during nanoporous structure evolution analyzed by in situ resistometry

Steyskal, E-M., Seidl, M., Graf, M. & Würschum, R., 2017, In : Physical chemistry, chemical physics. 19, p. 29880-29885

Research output: Contribution to journalArticleResearchpeer-review

Defects and Charging Processes in Li-Ion Battery Cathodes Studied by Operando Magnetometry and Positron Anihilation

Würschum, R., Topolovec, S., Klinser, G., Sprengel, W., Kren, H., Koller, S., Krenn, H., Hugenschmidt, C., Reiner, M., Gigl, T., Berkermeier, F. & Fiedler, M., 2017, In : Materials Science Forum. 879, p. 2125-2130

Research output: Contribution to journalArticleResearchpeer-review

Internal stress and defect-related free volume in submicrocrystalline Ni studied by neutron diffraction and difference dilatometry

Kotzurek, J., Hofmann, M., Simic, S., Pölt, P., Hohenwarter, A., Pippan, R., Sprengel, W. & Würschum, R., 2017, In : Philosophical magazine (London) / Letters. 97, 11, p. 450-458

Research output: Contribution to journalArticleResearchpeer-review

Open Access
dilatometry
residual stress
neutron diffraction
extensometers
cold rolling

Structural anisotropy in equal-channel angular extruded nickel revealed by dilatometric study of excess volume

Kotzurek, J., Sprengel, W., Krystian, M., Simic, S., Pölt, P., Hohenwarter, A., Pippan, R. & Würschum, R., 2017, In : International journal of materials research = Zeitschrift für Metallkunde. 108, p. 81-88

Research output: Contribution to journalArticleResearchpeer-review

2016

A high-stability non-contact dilatometer for low-amplitude temperature-modulated measurements

Luckabauer, M., Sprengel, W. & Würschum, R., 2016, In : Review of scientific instruments. 87, p. 075116

Research output: Contribution to journalArticleResearchpeer-review

Charging of lithium cobalt oxide battery cathodes studied by means of magnetometry

Klinser, G., Topolovec, S., Kren, H., Koller, S., Krenn, H. & Würschum, R., 2016, In : Solid State Ionics. 293, p. 64-71 8 p.

Research output: Contribution to journalArticleResearchpeer-review

Combined volumetric energetic and microstructural defect analysis of ECAP-processed nickel

Reglitz, G., Oberdorfer, B., Fleischmann, N., Kotzurek, J., Divinski, S., Sprengel, W., Wilde, G. & Würschum, R., 2016, In : Acta materialia. 103, p. 396-406

Research output: Contribution to journalArticleResearchpeer-review

Continuous monitoring of the bulk oxidation states in LixNi1/3Mn1/3Co1/3O2 during charging and discharging

Klinser, G., Topolovec, S., Kren, H., Koller, S., Gössler, W., Würschum, R. & Krenn, H., 2016, In : Applied Physics Letters. 109, p. 213901

Research output: Contribution to journalArticleResearchpeer-review

Direct measurement of vacancy relaxation by dilatometry

Kotzurek, J., Steyskal, E-M., Oberdorfer, B., Hohenwarter, A., Pippan, R., Sprengel, W. & Würschum, R., 2016, In : Applied Physics Letters. 109, p. 021906 4 p.

Research output: Contribution to journalArticleResearchpeer-review

Electrochemically Tunable Resistance of Nanoporous Platinum Produced by Dealloying

Steyskal, E-M., Qi, Z., Pölt, P., Albu, M., Weissmüller, J. & Würschum, R., 2016, In : Langmuir. 32, p. 7757−7764

Research output: Contribution to journalArticleResearchpeer-review

Enhanced magnetic moment of ultrathin Co films measured by in situ electrodeposition in a SQUID

Topolovec, S., Krenn, H. & Würschum, R., 2016, In : Journal of magnetism and magnetic materials. 397, p. 96-100

Research output: Contribution to journalArticleResearchpeer-review

In situ characterization of hydrogen absorption in nanoporous palladium produced by dealloying

Steyskal, E-M., Wiednig, C. A., Enzinger, N. & Würschum, R., 2016, In : Beilstein Journal of Nanotechnology . 7, p. 1197-1201

Research output: Contribution to journalArticleResearchpeer-review

Operando magnetometry on LixCoO2 during charging/discharging

Topolovec, S., Kren, H., Klinser, G., Koller, S., Krenn, H. & Würschum, R., 2016, In : Journal of solid state electrochemistry. 20, 5, p. 1491-1496 7 p.

Research output: Contribution to journalArticleResearchpeer-review

2015

Electrochemical cell for in situ electrodeposition of magnetic thin films in a superconducting quantum interference device magnetometer

Topolovec, S., Krenn, H. & Würschum, R., 2015, In : Review of scientific instruments. 86, p. 063903-063903

Research output: Contribution to journalArticleResearchpeer-review

2014

Grain boundary excess volume and defect annealing of copper after high-pressure torsion

Oberdorfer, B., Setman, D., Steyskal, E-M., Hohenwarter, A., Sprengel, W., Zehetbauer, M., Pippan, R. & Würschum, R., 2014, In : Acta materialia. 68, p. 189-195

Research output: Contribution to journalArticleResearchpeer-review

2013

Charging-induced defect formation in LixCoO2 battery cathodes studied by positron annihilation spectroscopy

Parz, P., Fuchsbichler, B., Koller, S., Bitschnau, B., Mautner, F-A., Puff, W. & Würschum, R., 2013, In : Applied Physics Letters. 102, p. 151901-1-151901-4

Research output: Contribution to journalArticleResearchpeer-review

Comprehensive defect characterization of different iron samples after severe plastic deformation

Puff, W., Zhou, X., Oberdorfer, B., Scherwitzl, B. R., Parz, P., Sprengel, W. & Würschum, R., 2013, In : Journal of Physics / Conference Series. 443, 1, p. 012033-012033

Research output: Contribution to journalArticleResearchpeer-review

In situ monitoring magnetism and resistance of nanophase platinum upon electrochemical oxidation

Steyskal, E-M., Topolovec, S., Landgraf, S., Krenn, H. & Würschum, R., 2013, In : Beilstein Journal of Nanotechnology . 4, p. 394-399

Research output: Contribution to journalArticleResearchpeer-review

SQUID magnetometry combined with in situ cyclic voltammetry: A case study of tunable magnetism of γ-Fe₂O₃ nanoparticles

Topolovec, S., Jerabek, P., Szabó, D. V., Krenn, H. & Würschum, R., 2013, In : Journal of magnetism and magnetic materials. 329, p. 43-48

Research output: Contribution to journalArticleResearchpeer-review

2012

Atomic Structure and Stuctural Stability of Sc_75Fe_25 Nanoglasses

Fang, J. X., Vainio, U., Puff, W., Würschum, R., Wang, X. L., Wang, D., Ghafari, M., Jiang, F., Sun, J., Hahn, H. & Gleiter, H., 2012, In : Nano Letters. 12, p. 458-463

Research output: Contribution to journalArticleResearchpeer-review

Defects in Al-3wt%Cu after high-pressure torsion studied by two-dimensional Doppler broadening spectroscopy

Parz, P., Faller, M. J., Pippan, R., Puff, W. & Würschum, R., 2012, In : Physics procedia . 35, p. 10-15

Research output: Contribution to journalArticleResearch

Dilatometry: a powerful tool for the study of defects in ultrafine grained metals

Sprengel, W., Oberdorfer, B., Steyskal, E-M. & Würschum, R., 2012, In : Journal of Materials Science. 47, p. 7921-7925

Research output: Contribution to journalArticleResearchpeer-review

Direct experimental determination of grain boundary excess volume in metals

Steyskal, E-M., Oberdorfer, B., Sprengel, W., Zehetbauer, M., Pippan, R. & Würschum, R., 2012, In : Physical Review Letters. 108, p. 055504/1-055504/5

Research output: Contribution to journalArticleResearchpeer-review

Free volumes in bulk nanocrystalline metals studied by the complementary techniques of positron annihilation and dilatometry

Würschum, R., Oberdorfer, B., Steyskal, E-M., Sprengel, W., Puff, W., Pikart, P., Hugenschmidt, C. & Pippan, R., 2012, In : Physica / B. 407, p. 2670-2675

Research output: Contribution to journalArticleResearchpeer-review

Microstructure and vacancy-type defects of high-pressure torsion deformed Al-3wt%Cu alloy

Parz, P., Faller, M. J., Pippan, R., Reingruber, H., Puff, W. & Würschum, R., 2012, In : Journal of Applied Physics. 112, p. 103506-1-103506-7

Research output: Contribution to journalArticleResearchpeer-review

Sign-inversion of charging-induced variation of electrical resistance of nanoporous platinum

Steyskal, E-M., Besenhard, M., Landgraf, S., Zhong, Y., Weissmüller, J., Pölt, P., Albu, M. & Würschum, R., 2012, In : Journal of Applied Physics. p. 073703-1-073703-7

Research output: Contribution to journalArticleResearchpeer-review

Spin-glass freezing of maghemite nanoparticles prepared by microwave plasma synthesis

Nadeem, K., Krenn, H., Traußnig, T., Würschum, R., Szabo, D. V. & Letofsky-Papst, I., 2012, In : Journal of Applied Physics. 111, p. 113911-113917

Research output: Contribution to journalArticleResearchpeer-review

2011

Effect of dipolar and exchange interactions on magnetic blocking of maghemite nanoparticles

Nadeem, K., Krenn, H., Traußnig, T., Würschum, R., Szabo, D. V. & Letofsky-Papst, I., 2011, In : Journal of magnetism and magnetic materials. 323, p. 1998-2004

Research output: Contribution to journalArticleResearchpeer-review

Magnetization of Fe-oxide based nanocomposite tuned by surface charging

Traußnig, T., Topolovec, S., Nadeem, K., Szabo, D. V., Krenn, H. & Würschum, R., 2011, In : Physica status solidi / Rapid research letters. 5, 4, p. 150-152

Research output: Contribution to journalArticleResearchpeer-review

Recrystallization kinetics of ultrafine-grained Ni studied by dilatometry

Oberdorfer, B., Steyskal, E-M., Sprengel, W., Pippan, R., Zehetbauer, M., Puff, W. & Würschum, R., 2011, In : Journal of Alloys and Compounds. 509, p. 5309-5311

Research output: Contribution to journalArticleResearchpeer-review

Structural and optical properties of nanoparticulate Y2O3:Eu2O3 made by microwave plasma synthesis

Kautsch, A., Brossmann, U., Krenn, H., Hofer, F., Szabo, D. V. & Würschum, R., 2011, In : Applied Physics / A. 105, 3, p. 709-712

Research output: Contribution to journalArticleResearchpeer-review

Structure and electrical properties of nanoparticulate tungsten oxide prepared by microwave plasma synthesis

Sagmeister, M., Postl, M., Brossmann, U., List, E., Klug, A., Letofsky-Papst, I., Szabó, D. & Würschum, R., 2011, In : Journal of physics / Condensed matter. 23, 33, p. 334206-1-334206-7

Research output: Contribution to journalArticleResearchpeer-review

2010

Absolute concentration of free volume-type defects in ultrafine-grained Fe prepared by high-pressure torsion

Oberdorfer, B., Lorenzoni, B., Unger, K., Sprengel, W., Zehetbauer, M., Pippan, R. & Würschum, R., 2010, In : Scripta materialia. 63, p. 452-455

Research output: Contribution to journalArticleResearchpeer-review

Adsorption-driven tuning of the electrical resistance of nanoporous gold

Wahl, P., Traußnig, T., Landgraf, S., Jin, H-J., Weissmüller, J. & Würschum, R., 2010, In : Journal of Applied Physics. 8, p. 073706-1-073706-6

Research output: Contribution to journalArticleResearchpeer-review

Bulk nanostructured materials by severe plastic deformation

Zehetbauer, M., Grössinger, R., Krenn, H., Krystian, M., Pippan, R., Rogl, P., Waitz, T. & Würschum, R., 2010, In : Advanced Engineering Materials. 12, p. 692-700

Research output: Contribution to journalArticleResearchpeer-review

In-situ probing of fast defect annealing in Cu and Ni with a high-intensity positron beam

Oberdorfer, B., Steyskal, E. . M., Sprengel, W., Puff, W., Pikart, P., Hugenschmidt, C., Zehetbauer, M., Pippan, R. & Würschum, R., 2010, In : Physical Review Letters. 105, p. 146101-1-146101-4

Research output: Contribution to journalArticleResearchpeer-review

Sol-gel synthesis and characterization of single-phase Ni ferrite nanoparticles dispersed in SiCO2 matrix

Nadeem, K., Traußnig, T., Letofsky-Papst, I., Krenn, H., Brossmann, U. & Würschum, R., 2010, In : Journal of Alloys and Compounds. 493, p. 385-390

Research output: Contribution to journalArticleResearchpeer-review