Junior Research Groups
Minerva / BMBF

Nanoscale Ferroelectric and Multiferroic Heterostructures

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2013

Bern, F. , M. Ziese , K. Dörr , A. Herklotz , and I. Vrejoiu
Hall effect of tetragonal and orthorhombic SrRuO3 films.
Physica Status Solidi RRL 7 (3) , p 204-206 (2013)

2012

Gaal, P. , D. Schick , M. Herzog , A. Bojahr , R. Shayduk , J. Goldshteyn , H. A. Navirian , W. Leitenberger , I. Vrejoiu , D. Khakhulin , M. Wulff , and M. Bargheer
Time-domain sampling of x-ray pulses using an ultrafast sample response.
Applied Physics Letters 101 (24) , p 243106/1-4 (2012)

Kim, J.-H. , I. Vrejoiu , Y. Khaydukov , T. Keller , J. Stahn , A. Rühm , D. K. Satapathy , V. Hinkov , and B. Keimer
Competing interactions at the interface between ferromagnetic oxides revealed by spin-polarized neutron reflectometry.
Physical Review B 86 (18) , p 180402(R)/1-5 (2012)

Johann, F. , A. Morelli , and I. Vrejoiu
Stability of 71° stripe domains in epitaxial BiFeO3 films upon repeated electrical switching.
Physica Status Solidi B 249 (11) , p 2278-2286 (2012)

Bojahr, A. , M. Herzog , D. Schick , I. Vrejoiu , and M. Bargheer
Calibrated real-time detection of nonlinearly propagating strain waves.
Physical Review B 86 (14) , p 144306/1-5 (2012)

Bojahr, A. , D. Schick , L. Maerten , M. Herzog , I. Vrejoiu , C. Korff Schmising , C. J. Milne , S. L. Johnson , and M. Bargheer
Comparing the oscillation phase in optical pump-probe spectra to ultrafast x-ray diffraction in the metal-dielectric SrRuO3/SrTiO3 superlattice.
Physical Review B 85 (22) , p 224302/1-6 (2012)

Vrejoiu, I. , D. Preziosi , A. Morelli , and E. Pippel
Multiferroic PbZrxTi1-xO3/Fe3O4 epitaxial sub-micron sized structures .
Applied Physics Letters 100 (10) , p 102903/1-4 (2012)

Bridoux, G. , J. Barzola-Quiquia , F. Bern , W. Böhlmann , I. Vrejoiu , M. Ziese , and P. Esquinazi
An alternative route towards micro- and nano-patterning of oxide films.
Nanotechnology 23 (8) , p 085302/1-7 (2012)

Talkenberger, A. , C. Himcinschi , T. Weißbach , V. Kannan , I. Vrejoiu , C. Röder , D. Rafaja , and J. Kortus
Raman spectroscopic and X-ray diffraction investigations of epitaxial BiCrO3 thin films.
Thin Solid Films 520 (14) , p 4590-4594 (2012)

2011

Vrejoiu, I. , A. Morelli , D. Biggemann , and E. Pippel
Ordered arrays of multiferroic epitaxial nanostructures.
Nano Reviews 2 (7364/1-7) , (2011)

Johann, F. , A. Morelli , D. Biggemann , M. Arredondo , and I. Vrejoiu
Epitaxial strain and electric boundary condition effects on the structural and ferroelectric properties of BiFeO3 films.
Physical Review B 84 (9) , p 094105/1-10 (2011)

Ziese, M. , and I. Vrejoiu
Anomalous and planar Hall effect of orthorhombic and tetragonal SrRuO3 layers.
Physical Review B 84 (10) , p 104413/1-8 (2011)

Vrejoiu, I. , A. Morelli , F. Johann , and D. Biggemann
Ordered 180° ferroelectric domains in epitaxial submicron structures.
Applied Physics Letters 99 (8) , p 082906/1-3 (2011)

Johann, F. , A. Morelli , and I. Vrejoiu
Epitaxial BiFeO3 nanostructures fabricated by differential etching of BiFeO3 films.
Applied Physics Letters 99 (8) , p 082904/1-3 (2011)

Roy Chaudhuri, A. , M. Arredondo , A. Hähnel , A. Morelli , M. Becker , M. Alexe , and I. Vrejoiu
Epitaxial strain stabilization of a ferroelectric phase in PbZrO3 thin films.
Physical Review B 84 (5) , p 054112/1-8 (2011)

Ziese, M. , I. Vrejoiu , E. Pippel , A. Hähnel , E. Nikulina , and D. Hesse
Orthorhombic-to-tetragonal transition of SrRuO3 layers in Pr0.7Ca0.3MnO3/SrRuO3 superlattices.
Journal of Physics D 44 (34) , p 345001/1-12 (2011)

Navirian, H. A. , M. Herzog , J. Goldshteyn , W. Leitenberger , I. Vrejoiu , D. Khakhulin , M. Wulff , R. Shayduk , P. Gaal , and M. Bargheer
Shortening x-ray pulses for pump-probe experiments at synchrotrons.
Journal of Applied Physics 109 (12) , p 126104/1-3 (2011)

Morelli, A. , F. Johann , N. Schammelt , and I. Vrejoiu
Ferroelectric nanostructures fabricated by focused-ion-beam milling in epitaxial BiFeO3 thin films.
Nanotechnology 22 (26) , p 265303/1-6 (2011)

Ziese, M. , E. Pippel , E. Nikulina , M. Arredondo , and I. Vrejoiu
Exchange coupling and exchange bias in La0.7Sr0.3MnO3-SrRuO3 superlattices.
Nanotechnology 22 (25) , p 254025/1-8 (2011)

Ziese, M. , I. Vrejoiu , E. Pippel , E. Nikulina , and D. Hesse
Magnetic properties of Pr0.7Ca0.3MnO3/SrRuO3 superlattices.
Applied Physics Letters 98 (13) , p 132504/1-3 (2011)

2010

Zelezny, V. , D. Chvostova , L. Pajasova , I. Vrejoiu , and M. Alexe
Optical properties of epitaxial BiFeO3 thin films.
Applied Physics A 100 (4) , p 1217-1220 (2010)

Ziese, M. , I. Vrejoiu , and D. Hesse
Inverted hysteresis and giant exchange bias in La0.7Sr0.3MnO3 / SrRuO3 superlattices.
Applied Physics Letters 97 (5) , p 052504/1-3 (2010)

Himcinschi, C. , I. Vrejoiu , M. Friedrich , E. Nikulina , L. Ding , C. Cobet , N. Esser , M. Alexe , D. Rafaja , and D. R. T. Zahn
Substrate influence on the optical and structural properties of pulsed laser deposited BiFeO3 epitaxial films.
Journal of Applied Physics 107 (12) , p 123524/1-5 (2010)

Arredondo, M. , Q. M. Ramasse , M. Weyland , R. Mahjoub , I. Vrejoiu , D. Hesse , N. D. Browning , M. Alexe , P. Munroe , and V. Nagarajan
Direct evidence for cation non-stoichiometry and Cottrell atmospheres around dislocation cores in functional oxide interfaces.
Advanced Materials 22 (22) , p 2430-2434 (2010)

Ziese, M. , I. Vrejoiu , and D. Hesse
Structural symmetry and magnetocrystalline anisotropy of SrRuO3 films on SrTiO3.
Physical Review B 81 (18) , p 184418/1-11 (2010)

Kim, Y. S. , I. Vrejoiu , D. Hesse , and M. Alexe
Reversible plasma switching in epitaxial BiFeO3 thin films.
Applied Physics Letters 96 (20) , p 202902/1-3 (2010)

Herzog, M. , W. Leitenberger , R. Shayduk , R. M. Veen , C. J. Milne , S. L. Johnson , I. Vrejoiu , M. Alexe , D. Hesse , and M. Bargheer
Ultrafast manipulation of hard X-rays by efficient Bragg switches.
Applied Physics Letters 96 (16) , p 161906/1-3 (2010)

Ziese, M. , I. Vrejoiu , E. Pippel , P. Esquinazi , D. Hesse , C. Etz , J. Henk , A. Ernst , I. V. Maznichenko , W. Hergert , and I. Mertig
Tailoring magnetic interlayer coupling in La0.7Sr0.3MnO3/SrRuO3 superlattices.
Physical Review Letters 104 (16) , p 167203/1-4 (2010)

Wu, D. , I. Vrejoiu , M. Alexe , and A. Gruverman
Anisotropy of domain growth in epitaxial ferroelectric capacitors.
Applied Physics Letters 96 (11) , p 112903/1-3 (2010)

Zhu, Y. L. , S. J. Zheng , X. L. Ma , L. Feigl , M. Alexe , D. Hesse , and I. Vrejoiu
Microstructural evolution of [PbZrxTi1-xO3/PbZryTi1-yO3]n epitaxial multilayers (x/y = 0.2/0.4, 0.4/0.6) - dependence on layer thickness.
Philosophical Magazine 90 (10) , p 1359-1372 (2010)

Himcinschi, C. , I. Vrejoiu , M. Friedrich , L. Ding , C. Cobet , N. Esser , M. Alexe , and D. R. T. Zahn
Optical characterisation of BiFeO3 epitaxial thin films grown by pulsed-laser deposition.
Physica Status Solidi C 7 (2) , p 296-299 (2010)

2009

Birajdar, B. I. , A. Chopra , I. Vrejoiu , M. Alexe , and D. Hesse
TEM study of ordering domains in Pb0.5Sc0.5TaO3 and threading dislocations in Ba0.7Sr0.3TiO3 epitaxial films.
MC 2009 - Proceedings Microscopy Conference 3 , Ed. W. Grogger , F. Hofer , P. Pölt p 467-468 Verlag der Technischen Universität Graz, Graz, Austria (2009)

Arredondo, M. , M. Saunders , A. Petraru , H. Kohlstedt , I. Vrejoiu , M. Alexe , D. Hesse , N. D. Browning , P. Munroe , and V. Nagarajan
Structural defects and local chemistry across ferroelectric-electrode interfaces in epitaxial heterostructures.
Journal of Materials Science 44 (19) , p 5297-5306 (2009)

Chopra, A. , B. I. Birajdar , Y. S. Kim , I. Vrejoiu , M. Alexe , and D. Hesse
Epitaxial, cation-ordered, ferroelectric PbSc0.5Ta0.5O3 thin films prepared by pulsed laser deposition.
Applied Physics Letters 95 (2) , p 022907/1-3 (2009)

Woerner, M. , C. Korff Schmising , M. Bargheer , N. Zhavoronkov , I. Vrejoiu , D. Hesse , M. Alexe , and T. Elsaesser
Ultrafast structural dynamics of perovskite superlattices.
Applied Physics A 96 (1) , p 83-90 (2009)

Jia, C. L. , S. B. Mi , K. Urban , I. Vrejoiu , M. Alexe , and D. Hesse
Effect of a single dislocation in a heterostructure layer on the local polarization of a ferroelectric layer.
Physical Review Letters 102 (11) , p 117601/1-4 (2009)

Feigl, L. , I. B. Misirlioglu , I. Vrejoiu , M. Alexe , and D. Hesse
Impact of misfit relaxation and a-domain formation on the electrical properties of tetragonal PbZr0.4Ti0.6O3/PbZr0.2Ti0.8O3 thin film heterostructures: Experiment and theoretical approach.
Journal of Applied Physics 105 (6) , p 061607/1-7 (2009)

Vrejoiu, I. , M. Alexe , D. Hesse , and U. Gösele
Ferroelectric nanostructures.
Journal of Vacuum Science & Technology B 27 (1) , p 498-503 (2009)

2008

Vrejoiu, I. , M. Alexe , D. Hesse , and U. Gösele
Functional perovskites - from epitaxial films to nanostructured arrays.
Advanced Functional Materials 18 (24) , p 3892-3906 (2008)

Pintilie, L. , I. Vrejoiu , D. Hesse , and M. Alexe
The influence of the top-contact metal on the ferroelectric properties of epitaxial ferroelectric Pb(Zr0.2Ti0.8)O3 thin films.
Journal of Applied Physics 104 (11) , p 114101/1-6 (2008)

Scott, J. F. , A. Gruverman , D. Wu , I. Vrejoiu , and M. Alexe
Nanodomain faceting in ferroelectrics.
Journal of Physics: Condensed Matter 20 (42) , p 425222/1-5 (2008)

Ziese, M. , A. Setzer , I. Vrejoiu , B. I. Birajdar , B. J. Rodriguez , and D. Hesse
Structural, magnetic and electric properties of La0.7Sr0.3MnO3/PbZrxTi1-xO3 heterostructures.
Journal of Applied Physics 104 (6) , p 063908/1-9 (2008)

Korff Schmising, C. , A. Harpoeth , N. Zhavoronkov , Z. Ansari , C. Aku-Leh , M. Woerner , T. Elsaesser , M. Bargheer , M. Schmidbauer , I. Vrejoiu , D. Hesse , and M. Alexe
Ultrafast magnetostriction and phonon-mediated stress in a photoexcited ferromagnet.
Physical Review B 78 (6) , p 060404(R)/1-4 (2008)

Gruverman, A. , D. Wu , H. J. Fan , I. Vrejoiu , M. Alexe , R. J. Harrison , and J. F. Scott
Vortex ferroelectric domains.
Journal of Physics: Condensed Matter 20 (34) , p 342201/1-5 (2008)

Ziese, M. , I. Vrejoiu , A. Setzer , A. Lotnyk , and D. Hesse
Coupled magnetic and structural transitions in La0.7Sr0.3MnO3 films on SrTiO3.
New Journal of Physics 10 (6) , p 063024/1-8 (2008)

Vrejoiu, I. , M. Ziese , A. Setzer , P. D. Esquinazi , B. I. Birajdar , A. Lotnyk , M. Alexe , and D. Hesse
Interfacial strain effects in epitaxial multiferroic heterostructures of PbZrxTi1-xO3/La0.7Sr0.3MnO3 grown by pulsed-laser deposition.
Applied Physics Letters 92 (15) , p 152506/1-3 (2008)

Jesse, S. , B. J. Rodriguez , S. Choudhury , A. P. Baddorf , I. Vrejoiu , D. Hesse , M. Alexe , E. A. Eliseev , A. N. Morozovska , J. X. Zhang , L.-Q. Chen , and S. V. Kalinin
Direct imaging of the spatial and energy distribution of nucleation centres in ferroelectric materials.
Nature Materials 7 (3) , p 209 - 215 (2008)

Jia, C.-L. , S.-B. Mi , K. Urban , I. Vrejoiu , M. Alexe , and D. Hesse
Atomic-scale study of electric dipoles near charged and uncharged domain walls in ferroelectric films.
Nature Materials 7 (1) , p 57 - 61 (2008)

2007

Korff Schmising, C. , M. Bargheer , M. Kiel , N. Zhavoronkov , M. Woerner , T. Elsaesser , I. Vrejoiu , D. Hesse , and M. Alexe
Accurate time delay determination for femtosecond X-ray diffraction experiments.
Applied Physics B 88 , p 1-4 (2007)

Korff Schmising, C. , M. Bargheer , M. Kiel , N. Zhavoronkov , M. Woerner , T. Elsaesser , I. Vrejoiu , D. Hesse , and M. Alexe
Coupled ultrafast lattice and polarization dynamics in ferroelectric nanolayers.
Physical Review Letters 98 (25) , p 257601/1-4 (2007)

Pintilie, L. , I. Vrejoiu , D. Hesse , G. Le Rhun , and M. Alexe
Extrinsic contributions to the apparent thickness dependence of the dielectric constant in epitaxial Pb(Zr,Ti)O3 thin films.
Physical Review B 75 (22) , p 224113/1-12 (2007)

Pintilie, L. , I. Vrejoiu , G. Le Rhun , and M. Alexe
Short-circuit photocurrent in epitaxial lead zirconate-titanate thin films.
Journal of Applied Physics 101 (6) , p 064109/1-8 (2007)

Pintilie, L. , I. Vrejoiu , D. Hesse , G. Le Rhun , and M. Alexe
Ferroelectric polarization-leakage current relation in high quality epitaxial Pb(Zr,Ti)O3 films.
Physical Review B 75 (10) , p 104103/1-14 (2007)

Vrejoiu, I. , Y. L. Zhu , G. Le Rhun , M. A. Schubert , D. Hesse , and M. Alexe
Structure and properties of epitaxial ferroelectric PbZr0.4Ti0.6O3/PbZr0.6Ti0.4O3 superlattices grown on SrTiO3(001) by pulsed laser deposition.
Applied Physics Letters 90 (7) , p 072909/1-3 (2007)

Le Rhun, G. , I. Vrejoiu , and M. Alexe
Piezoelectric response hysteresis in the presence of ferroelastic 90° domain walls.
Applied Physics Letters 90 (1) , p 012908/1-3 (2007)

2006

Vrejoiu, I. , G. Le Rhun , L. Pintilie , D. Hesse , M. Alexe , and U. Gösele
Intrinsic ferroelectric properties of strained tetragonal PbZr0.2Ti0.8O3 obtained on layer-by-layer grown, defect-free single crystalline films.
Advanced Materials 18 (13) , p 1657-1661 (2006)

Vrejoiu, I. , G. Le Rhun , N. D. Zakharov , D. Hesse , L. Pintilie , and M. Alexe
Threading dislocations in epitaxial ferroelectric PbZr0.2Ti0.8O3 films and their effect on polarization backswitching.
Philosophical Magazine 86 (28) , p 4477-4486 (2006)

Korff Schmising, C. , M. Bargheer , M. Kiel , N. Zhavoronkov , M. Woerner , T. Elsaesser , I. Vrejoiu , D. Hesse , and M. Alexe
Strain propagation in nanolayered perovskites probed by ultrafast x-ray diffraction.
Physical Review B 73 (21) , p 212202/1-4 (2006)

Le Rhun, G. , I. Vrejoiu , L. Pintilie , D. Hesse , M. Alexe , and U. Gösele
Increased ferroelastic domain mobility in ferroelectric thin films and its use in nano-patterned capacitors.
Nanotechnology 17 (13) , p 3154-3159 (2006)

Pintilie, L. , I. Vrejoiu , D. Hesse , and M. Alexe
Polarization fatigue and frequency-dependent recovery in Pb(Zr,Ti)O3 epitaxial thin films with SrRuO3 electrodes.
Applied Physics Letters 88 (10) , p 102908/1-3 (2006)

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