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Articles

2016

  • S. Holbein, M. Ackermann, L. Chapon, P. Steffens, A. Gukasov, A. Sazonov, O. Breunig, Y. Sanders, P. Becker, L. Bohaty, T. Lorenz and M. Braden
    Strong magnetoelastic coupling at the transition from harmonic to anharmonic order in NaFe(WO4)2 with 3d5 configuration
    Phys. Rev. B, 94, 104423, (2016). arXiv:1609.01849 [PDF, 4648 kB]

2015

  • M. Baum, A.C. Komarek, S. Holbein, M.T. Fernandez-Diaz, G. Andre, A. Hiess, Y. Sidis, P. Steffens, P. Becker, L. Bohaty and M. Braden
    Magnetic structure and multiferroic coupling in pyroxene NaFeSi2O6
    Phys. Rev. B, 91, 21, 214415, (2015)
  • S. Holbein, P. Steffens, T. Finger, A. C. Komarek, Y. Sidis, P. Link and M. Braden
    Field and temperature dependence of electromagnon scattering in TbMnO3 studied by inelastic neutron scattering
    Phys. Rev. B, 91, 014432, (2015)
  • F. Waßer, A. Schneidewind, Y. Sidis, S. Wurmehl, S. Aswartham, B. Büchner and M. Braden
    Spin reorientation in Ba0.65Na0.35Fe2As2 studied by single-crystal neutron diffraction
    Phys. Rev. B, 91, 060505(R), (2015)
  • N. Qureshi, M. Valldor, L. Weber, A. Senyshyn, Y. Sidis and M. Braden
    Magnetic spin-flop transition and interlayer spin-wave dispersion in PrCaFeO4 revealed by neutron diffraction and inelastic neutron scattering
    Phys. Rev. B, 91, 224402, (2015)
  • J. Stein, M. Baum, S. Holbein, T. Cronert, V. Hutanu, A. C. Komarek and M. Braden
    Control of multiferroic domains by external electric fields in TbMnO3
    J. Phys.: Condens. Matter, 27, 446001, (2015)
  • S. Kunkemöller, D. Khomskii, P. Steffens, A. Piovano, A. A. Nugroho and M. Braden
    Highly Anisotropic Magnon Dispersion in Ca2RuO4: Evidence for Strong Spin Orbit Coupling
    Phys. Rev. Lett., 115, 247201, (2015)

2014

  • M. Baum, J. Leist, Th. Finger, K. Schmalzl, A. Hiess, L.P. Regnault, P. Becker, L. Bohaty, G. Eckold and M. Braden
    Kinetics of the multiferroic switching in MnWO4
    Phys. Rev. B, 89, 14, 144406, (2014)
  • D. Niermann, C. P. Grams, M. Schalenbach, P. Becker, L. Bohatý, J. Stein, M. Braden and J. Hemberger
    Domain dynamics in the multiferroic phase of MnWO4
    Phys. Rev. B, 89, 13, 134412, (2014), http://link.aps.org/doi/10.1103/PhysRevB.89.134412
  • N. Qureshi, C. H. Lee, K. Kihou, K. Schmalzl, P. Steffens and M. Braden
    Anisotropy of incommensurate magnetic excitations in slightly overdoped Ba0.5K0.5Fe2As2 probed by polarized inelastic neutron scattering experiments
    Phys. Rev. B, 90, 100502(R), (2014)
  • S. Kunkemöller, A. A. Nugroho, Y. Sidis and M. Braden
    Spin-density-wave ordering in Ca0.5Sr1.5RuO4 studied by neutron scattering
    Phys. Rev. B, 89, 045119, (2014)
  • J. Brand, A. Stunault, S. Wurmehl, L. Harnagea, B. Büchner, M. Meven and M. Braden
    Spin susceptibility in superconducting LiFeAs studied by polarized neutron diffraction
    Phys. Rev. B, 89, 045141, (2014)
  • N. Qureshi, P. Steffens, D. Lamago, Y. Sidis, O. Sobolev, R. A. Ewings, L. Harnagea, S. Wurmehl, B. Büchner and M. Braden
    Fine structure of the incommensurate antiferromagnetic fluctuations in single-crystalline LiFeAs studied by inelastic neutron scattering
    Phys. Rev. B, 90, 144503, (2014)
  • T. Finger, K. Binder, Y. Sidis, A. Maljuk, D. N. Argyriou and M. Braden
    Magnetic order and electromagnon excitations in DyMnO3 studied by neutron scattering experiments
    Phys. Rev. B, 90, 224418, (2014)

2013

  • M. Baum, K. Schmalzl, P. Steffens, A. Hiess, L.P. Regnault, . M. Meven, P. Becker, L. Bohaty and M. Braden
    Controlling toroidal moments by crossed electric and magnetic fields
    Phys. Rev. B, 88, 2, 024414, (2013)
  • A. Shuvaev, V. Dziom, Anna Pimenov, M. Schiebl, A. A. Mukhin, A. C. Komarek, T. Finger, M. Braden and A. Pimenov
    Electric Field Control of Terahertz Polarization in a Multiferroic Manganite with Electromagnons
    Phys. Rev. Lett., 111, 227201, (2013)
  • N. Qureshi, E. Ressouche, A. A. Mukhin, V. Yu Ivanov, S. N. Barilo, S. V. Shiryaev and V. Skumryev
    Stabilization of multiferroic spin cycloid in Ni3V2O8 by light Co doping
    Phys. Rev. B, 88, 174412, (2013)
  • C. H. Lee, P. Steffens, N. Qureshi, M. Nakajima, K. Kihou, A. Iyo, H. Eisaki and M. Braden
    Universality of the Dispersive Spin-Resonance Mode in Superconducting BaFe2As2
    Phys. Rev. Lett., 111, 167002, (2013)
  • J. Reul, L. Fels, N. Qureshi, K. Shportko, M. Braden and M. Grüninger
    Temperature-dependent optical conductivity of layered LaSrFeO4
    Phys. Rev. B, 87, 205142, (2013), http://prb.aps.org/abstract/PRB/v87/i20/e205142. arXiv:1303.0709 [PDF, 835 kB]
  • S. K. Niesen, G. Kolland, M. Seher, O. Breunig, M. Valldor, M. Braden, B. Grenier and T. Lorenz
    Magnetic phase diagrams, domain switching and a quantum phase transition of the quasi-1D Ising-like antiferromagnet BaCo2V2O8
    Phys. Rev. B, 87, 224413, (2013). arXiv:1303.5599 [PDF, 3234 kB]
  • N. Qureshi, H. Ulbrich, Y. Sidis, A. Cousson and M. Braden
    Magnetic structure and magnon dispersion in LaSrFeO4
    Phys. Rev. B, 87, 054433, (2013)
  • P. Steffens, C. H. Lee, N. Qureshi, K. Kihou, A. Iyo, H. Eisaki and M. Braden
    Splitting of Resonance Excitations in Nearly Optimally Doped Ba(Fe0.94Co0.06)2As2: An Inelastic Neutron Scattering Study with Polarization Analysis
    Phys. Rev. Lett., 110, 137001, (2013)

2012

  • A C. Komarek, M. Reuther, T. Lorenz, A. Cousson, P. Link, W. Morgenroth, D. Trots, C. Baehtz and M. Braden
    Evidence for charge and orbital order in the doped titanates RE(1-x)CaxTiO3 (RE=Y, Er, Lu)
    Submitted, Phys. Rev. Lett., (2012). arXiv:1109.0234
  • H. Ulbrich and M. Braden
    Neutron scattering studies on stripe phases in non-cuprate materials
    Physica C, 481, 31, (2012). arXiv:1201.2356v1
  • N. Qureshi, P. Steffens, Y. Drees, A. C. Komarek, D. Lamago, Y. Sidis, L. Harnagea, H.-J. Grafe, S. Wurmehl, B. Büchner and M. Braden
    Inelastic Neutron-Scattering Measurements of Incommensurate Magnetic Excitations on Superconducting LiFeAs Single Crystals
    Phys. Rev. Lett., 108, 117001, (2012)
  • H. Ulbrich, P. Steffens, D. Lamago, Y. Sidis and M. Braden
    Hourglass Dispersion in Overdoped Single-Layered Manganites
    Phys. Rev. Lett., 108, 247209, (2012)
  • N. Qureshi, P. Steffens, S. Wurmehl, S. Aswartham, B. Büchner and M. Braden
    Local magnetic anisotropy in BaFe2As2: A polarized inelastic neutron scattering study
    Phys. Rev. B, 86, 060410(R), (2012)
  • J. Knolle, V. B. Zabolotnyy, I. Eremin, S. V. Borisenko, N. Qureshi, M. Braden, D. V. Evtushinsky, T. K. Kim, A. A. Kordyuk, S. Sykora, Ch. Hess, I. V. Morozov, S. Wurmehl, R. Moessner and B. Büchner
    Incommensurate magnetic fluctuations and Fermi surface topology in LiFeAs
    Phys. Rev. B, 86, 174519, (2012)
  • W.-D. Stein, J. Liebertz, P. Becker, L. Bohatý and M. Braden
    Structural investigations of the tetraborates MB4O7 (M = Pb, Sr, Ba)
    Euro. Phys. J. B, 85, 236, (2012)
  • H.-H. Wu, M. Buchholz, C. Trabant, C.F. Chang, A.C. Komarek, F. Heigl, M .v. Zimmermann, M . Cwik, F. Nakamura, M. Braden and C. Schüßler-Langeheine
    Charge stripe order near the surface of 12-percent doped La2-xSrxCuO4
    Nat. Commun., 3, 1023, (2012)

2011

2010

  • T. Finger, D. Senff, K. Schmalzl, W. Schmidt, L. P. Regnault, P. Becker, L. Bohatỳ and M. Braden
    Electric-field control of the chiral magnetism of multiferroic MnWO4 as seen via polarized neutron diffraction
    Phys. Rev. B, 81, 054430, (2010), http://link.aps.org/doi/10.1103/PhysRevB.81.054430
  • N. Qureshi, Y. Drees, J. Werner, S. Wurmehl, C. Hess, R. Klingeler, B. Büchner, M. T. Fernández-Díaz and M. Braden
    Crystal and magnetic structure of the oxypnictide superconductor LaFeAsO1−xFx: A neutron-diffraction study
    Phys. Rev. B, 82, 184521, (2010), http://link.aps.org/doi/10.1103/PhysRevB.82.184521
  • T. Finger, D. Senff, K. Schmalzl, W. Schmidt, L. P. Regnault, P. Becker, L. Bohatý and M. Braden
    Polarized-neutron-scattering studies on the chiral magnetism in multiferroic MnWO4
    J. Phys.: Conf. Ser., 211, 012001, (2010)
  • M. Janoschek, P. Böni and M. Braden
    Optimization of elliptic neutron guides for triple-axis spectroscopy
    , 613, 119, (2010)
  • Chul-Ho Lee, K. Kihou, K. Horigane, S. Tsutsui, T. Fukuda, H. Eisaki, A. Iyo, H. Yamaguchi, A.Q. R. Baron, M. Braden and K. Yamada
    Effect of K Doping on Phonons in Ba1-xKxFe2As2
    J. Phys. Soc. Jpn., 79, 014714, (2010)
  • A. Kondrat, J.E. Hamann-Borrero, N. Leps, M. Kosmala, O.J. Schumann, A. KÄohler, J. Werner, G. Behr, M. Braden, R. Klingeler and B. Büchner C. Hess
    Synthesis and physical properties of LaO1-xFxFeAs
    Euro. Phys. J. B, 70, 461, (2010)

2009

2008

2007

2006

2005

2004

2003

2002

Theses

2013

2011

  • S. Holbein
    Mikroskopische und makroskopische Untersuchungen an Multiferroika
    Diploma thesis, Universität zu Köln, (2011)
  • A. Bielefeld
    Charakterisierung von La2-xSrxNiO4-Einkristallen: Eingrenzung der Streifenkorrelationen
    Diploma thesis, Universität zu Köln, (2011)

2010

  • A. Silex
    Mott transition, Ferromagnetism and Metamagnetism in Ruthenates
    Diploma thesis, Universität zu Köln, (2010)
  • Y. Drees
    Strukturuntersuchungen mit Röntgen- und Neutronenbeugung an LaO1-xFeAsFx und Li1-dFeAs
    Diploma thesis, Universität zu Köln, (2010)
  • J. Brand
    Strukturbestimmungen an Ruthenaten und Na10Mn4O9
    Diploma thesis, Universität zu Köln, (2010)
  • O.J. Schumann
    Structural Investigations on layered Manganates and Ruthenates
    PhD thesis, Universität zu Köln, (2010)

2009

  • M. Baum
    Magnetische Struktur und Anregungen in Multiferroika
    Diploma thesis, Universität zu Köln, (2009)
  • H. Ulbrich
    Strukturelle und dynamische Untersuchungen in 113 und 214-Manganaten
    Diploma thesis, Universität zu Köln, (2009)
  • M. Kosmala
    Strukturuntersuchungen am 1111-FeAs-Supraleiter und halb-dotiertem einfach geschichteten Perowskitten
    Diploma thesis, Universität zu Köln, (2009)
  • M. Gottschlich
    Strukturbestimmungen an Sr2RhO4, Sr2Ru1-xTixO4, Ti2O3 und V2O3
    Diploma thesis, Universität zu Köln, (2009)
  • A.C. Komarek
    Complex Ordering phenomena in transition-metal oxides and oxyhalides
    PhD thesis, Universität zu Köln, (2009)
  • M. Gellesch
    Präparation und Charakterisation von La/SrMnO3-Kristallen
    Bachelor thesis, Universität zu Köln, (2009)

2008

  • S. Price
    Streuuntersuchungen an komplexen Schichtruthenaten
    Diploma thesis, Universität zu Köln, (2008)

2007

  • T. Finger
    Strukturuntersuchungen an Kobaltaten
    Diploma thesis, Universität zu Köln, (2007)
  • P. Steffens
    Magnetism in layered ruthenates
    PhD thesis, Universität zu Köln, (2007)
  • M. Cwik
    The interplay of lattice, spin and charge degrees of freedom in layered cobaltates
    PhD thesis, Universität zu Köln, (2007)
  • D. Senff
    Neutron scattering studies on magnetic excitations in complex ordered manganites
    PhD thesis, Universität zu Köln, (2007)
  • W.D. Stein
    Struktur und Gitterdynamik in azentrischen Boraten
    PhD thesis, Universität zu Köln, (2007)

2005

  • M. Haider
    Strukturuntersuchungen an La2-xSrxCo1-yRuyO4 und Umbau der XPD Anlagen
    Diploma thesis, Universität zu Köln, (2005)

2004

  • O.J. Schumann
    Neutronen- und Röntgenmessungen an Ruthenium-Verbindungen
    Diploma thesis, Universität zu Köln, (2004)
  • T. Taetz
    Präparation und Charakterisierung von NaxCoO2
    Diploma thesis, University of cologne, (2004)
  • A. Komarek
    Strukturuntersuchungen an Titanaten
    Diploma thesis, Universität zu Köln, (2004)

2003

  • P. Steffens
    Struktur und Magnetismus in Ca2-xSrxRuO4
    Diploma thesis, Universität zu Köln, (2003)
  • D. Senff
    Magnetische und orbitale Korrelationen in einfach geschichteten Manganaten der Reihe La1-xSr1+xMnO4
    Diploma thesis, Universität zu Köln, (2003)
  • O. Friedt
    Interplay between electronic, magnetic and structural instabilities in Ca2-xSrxRuO4 a neutron scattering study
    PhD thesis, Université Paris, (2003)