Prof. Jo Stöhr

Prof. Hermann Dürr

Prof. H. C. Siegmann

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Control of the metal-insulator transition in vanadium dioxide by modifying orbital occupancy
N.B. Aetukuri, A.X. Gray, M. Drouard, M. Cossale, L. Gao, A.H. Reid, R. Kukreja, H. Ohldag, C.A. Jenkins, E. Arenholz, K.P. Roche, H.A. Dürr, M.G. Samant and S.S.P. Parkin, Nature Phys. 9, 661 (2013).

Magnetic design evolution in perpendicular magnetic recording media as revealed by resonant small angle x-ray scattering
T. Wang, V. Mehta, Y. Ikeda, H. Do, K. Takano, S. Florez, B.D. Terris, B. Wu, C.E. Graves, M. Shu, R. Rick, A.O. Scherz, J. Stöhr and O. Hellwig, Appl. Phys. Lett. 103, 112403 (2013).

Speed limit of the insulator-metal transition in magnetite
S. de Jong*, R. Kukreja*, C. Trabant, N. Pontius, C. F. Chang, T. Kachel, M. Beye, F. Sorgenfrei, C. H. Back, B. Bräuer, W. F. Schlotter, J. J. Turner, O. Krupin, M. Doehler, D. Zhu, M. A. Hossain, A. O. Scherz, D. Fausti, F. Novelli, M. Esposito, W. S. Lee, Y. D. Chuang, D. H. Lu, R. G. Moore, M. Yi, M. Trigo, P. Kirchmann, L. Pathey, M. S. Golden, M. Buchholz, P. Metcalf, F. Parmigiani, W. Wurth, A. Föhlisch, C. Schüßler-Langeheine and H.A. Dürr, Nature Mater. 12, 882 (2013).
*These authors contributed equally to this work.

Nanoscale spin reversal by non-local angular momentum transfer following ultrafast laser excitation in ferrimagnetic GdFeCo
C.E. Graves*, A.H. Reid*, T. Wang, B. Wu, S. de Jong, K. Vahaplar, I. Radu, D.P. Bernstein, M. Messerschmidt, L. Müller, R. Coffee, M. Bionta, S.W. Epp, R. Hartmann, N. Kimmel, G. Hauser, A. Hartmann, P. Holl, H. Gorke, J.H. Mentink, A. Tsukamoto, A. Fognini, J.J. Turner, W.F. Schlotter, D. Rolles, H. Soltau, L. Strüder, Y. Acremann, A.V. Kimel, A. Kirilyuk, Th. Rasing, J. Stöhr, A.O. Scherz, and H.A. Dürr, Nature Mater. 12, 293 (2013).
*These authors contributed equally to this work.


Interplay between intrinsic and stacking-fault magnetic domains in bi-layered manganites
M.A. Hussain, M.H. Burkhardt, S. Sarkar, H. Ohldag, Y.-D. Chuang, A. Scholl, A.T. Young, A. Doran, D.S. Dessau, H. Zheng, J.F. Mitchell, H.A. Dürr, and J. Stöhr, Appl. Phys. Lett. 101, 132402 (2012).

Femtosecond Single-Shot Imaging of Nanoscale Ferromagnetic Order in Co/Pd Multilayers Using Resonant X-Ray Holography
T. Wang, D. Zhu, B. Wu, C.E. Graves, S. Schaffert, T. Rander, L. Müller, B. Vodungbo, C. Baumier, D.P. Bernstein, B. Bräuer, V. Cros, S. de Jong, R. Delaunay, A. Fognini, R. Kukreja, S. Lee, V. Lopez-Flores, J. Mohanty, B. Pfau, H. Popescu, M. Sacchi, A.B. Sardinha, F. Sirotti, P. Zeitoun, M. Messerschmidt, J.J. Turner, W.F. Schlotter, O. Hellwig, R. Mattana, N. Jaouen, F. Fortuna, Y. Acremann, C. Gutt, H.A. Dürr, E. Beaurepaire, C. Boeglin, S. Eisebitt, G. Grübel, J. Lüning, J. Stöhr, and A.O. Scherz, Phys. Rev. Lett. 108, 237202 (2012).

Imaging the First-Order Magnetic Transition in La0.35Pr0.275Ca0.375MnO3
M.H. Burkhardt, M.A. Hussain, S. Sarkar, Y.-D. Chuang, A.G. Cruz Gonzalez, A. Doran, A. Scholl, A.T. Young, N. Tahir, Y.J. Choi, S.-W. Cheong, H.A. Dürr, and J. Stöhr, Phys. Rev. Lett. 108, 267403 (2012).

X-ray pulse preserving single-shot optical cross-correlation method for improved experimental temporal resolution
M. Beye, O. Krupin, G. Hays, A.H. Reid, D. Rupp, S. de Jong, S. Lee, W.-S. Lee, Y.-D. Chuang, R. Coffee, J.P. Cryan, J.M. Glownia, A. Föhlisch, M.R. Holmes, A.R. Fry, W.E. White, C. Bostedt, A.O. Scherz, H.A. Dürr and W.F. Schlotter, Appl. Phys. Lett. 100, 121108 (2012).

Creation and diagnosis of a solid-density plasma with an X-ray free-electron laser
S. Vinko, O. Ciricosta, B. Cho, K. Engelhorn, H. Chung, C.R.D. Brown, T. Burian, J. Chalupský, R. Falcone, C.E. Graves, V. Hájková, A. Higginbotham, L. Juha, J. Krzywinski, H.J. Lee, M. Messerschmidt, C. Murphy, Y. Ping, A. Scherz, W. Schlotter, S. Toleikis, J. Turner, L. Vysin, T. Wang, B. Wu, U. Zastrau, D. Zhu, R.W. Lee, P. Heimann, B. Nagler, and J.S. Wark, Nature 482, 59 (2012).


Observations of laser induced magnetization dynamics in Co/Pd multilaters with coherent x-ray scattering
B. Wu, D. Zhu, Y. Acremann, T. Miller, A. Lindenberg, O. Hellwig, J. Stöhr, and A. Scherz, Appl. Phys. Lett. 99, 252505 (2011).

Coherence properties of individual femtosecond pulses of an x-ray free-electron laser
I. Vartanyants, A.Singer, A. Mancuso, O. Yefanov, A. Sakdinawat, Y. Liu, E. Bang, G. Williams, G. Cadenazzi, B. Abbey, H. Sinn, D. Attwood, K. Nugent, E. Weckert, T. Wang, B. Wu, C.E. Graves, A. Scherz, J. Turner, W. Schlotter, M. Messerschmidt, J. Lüning,Y. Acremann, P. Heimann, D. Mancini, V. Joshi, J. Krzywinski, R. Soufli, M. Fernandez-Perea, S. Hau-Riege, A. Peele, Y. Feng, O. Krupin, S. Moeller, and W. Wurth, Phys. Rev. Lett. 107, 144801 (2011).

Linac Coherent Light Source soft x-ray materials science instrument optical design and monochromator commissioning
P. Heimann, O. Krupin, W. Schlotter, J. Turner, J. Krzywinski, F. Sorgenfrei, M. Messerschmidt, D. Bernstein, J. Chalupský, V. Hájková, S. Hau-Riege, M. Holmes, L. Juha, N. Kelez, J. Lüning, D. Nordlund, M. Fernandez-Perea, A. Scherz, R. Soufli, W. Wurth, and M. Rowen, Rev. Sci. Instrum. 82, 093104 (2011).

Nonuniform switching of the perpendicular magnetization in a spin-torque-driven magnetic nanopillar
D.P. Bernstein, B. Bräuer, R. Kukreja, J. Stöhr, T. Hauet, J. Cucchiara, S. Mangin, J. Katine, T. Tyliszczak, K. Chou, and Y. Acremann Phys. Rev. B 83, 180410 (2011).

Images of a spin-torque-driven magnetic nano-oscillator
X.W. Yu, V. Pribiag, Y. Acremann, A. Tulapurkar, T. Tyliszczak, K. Chou, B. Bräuer, Z.-P. Li, O.J. Lee, P. Gowtham, D. Ralph, R. Buhrman and J. Stöhr, Phys. Rev. Lett. 106, 167202 (2011).

Solvent additives and their effects on blend morphologies of bulk heterojunctions
T. Salim, L. Wong, B. Bräuer, R. Kukreja, Y. Foo, Z. Bao, and Y. Lam, J. Mater. Chem. 21, 242 (2011).


High resolution x-ray lensless imaging by differential holographic encoding
D. Zhu, M. Guizar-Sicairos, B. Wu, A. Scherz, Y. Acremann, T. Tyliszczak, P. Fischer, N. Friedenberger, K. Ollefs, M. Farle, J. R. Fienup, and J. Stöhr, Phys. Rev. Lett. 105, 043901 (2010).

Holographic x-ray image reconstruction through the application of differential and integral operators
M. Guizar-Sicairos, D. Zhu, J. R. Fienup, B. Wu, A. Scherz, and J. Stöhr, Opt. Lett. 35, 928 (2010).

X-ray micropscopy imaging of the grain orientation in a pentacene field-effect transistor
B. Bräuer, A. Virkar, S. Mannsfeld, D. Bernstein, R. Kukreja, K. Chou, T. Tyliszczak, Z. Bao, and Y. Acremann, Chem. Mater. 22, 3693 (2010).


Near edge x-ray absorption fine structure spectroscopy with x-ray free-electron lasers
D. P. Bernstein, Y. Acremann, A. Scherz, M. Burkhardt, J. Stöhr, M. Beye, W. F. Schlotter, T. Beeck, F. Sorgenfrei, A. Pietzsch, W. Wurth, and A. Föhlisch, Appl. Phys. Lett. 95, 134102 (2009).

Phase retrieval in x-ray lensless holography by reference beam tuning
D. Zhu, B. Wu, R. Rick, J. Stöhr, and A. Scherz, Opt. Lett. 34, 2604 (2009) .

Time-resolved x-ray imaging of magnetization dynamcis in spin-transfer torque devices
V. Chembrolu, J.P. Strachan, X.W. Yu, A.A. Tulapurkar, T. Tyliszczak, J.A. Katine, M.J. Carey, and J. Stöhr, Y. Acremann, Phys. Rev. B 80, 024417 (2009).

Electric field induced magnetic anisotropy in a ferrormagnet
S.J. Gamble, Mark H. Burkhardt, A. Kashuba, Rolf Allenspach, Stuart S.P. Parking, H. C. Siegmann, and J. Stöhr, Phys. Rev. Lett. 102, 217201 (2009).

Magnetization switching without charge or spin currents
J. Stöhr, H. C. Siegmann, A. Kashuba, and S.J. Gamble, Appl. Phys. Lett. 94, 073504 (2009).

Optimal signal-to-noise ratios for soft x-ray lensless imaging
R. Rick, A. Scherz, W.F. Schlotter, D. Zhu, J. Lüning, and J. Stöhr, Opt. Lett. 34, 650 (2009) .


An amplifier concept for spintronics
Y. Acremann, X.W. Yu, A.A. Tulapurkar, A. Scherz, V. Chembrolu, J.A. Katine, M.J. Carey, H.C. Siegmann, and J. Stöhr, Appl. Phys. Lett. 93, 102513 (2008).

Nanoscale imaging with resonant coherent x rays: extension of multiple-wavelength anomalous diffraction to nonperiodic structures
A. Scherz, D. Zhu, R. Rick, W.F. Schlotter, S. Roy, J. Lüning, and J. Stöhr, Phys. Rev. Lett. 101, 076101 (2008).

Direct observation of spin-torque driven magnetization reversal through nonuniform modes
J.P. Strachan, V. Chembrolu, Y. Acremann, X.W. Yu, A.A. Tulapurkar, T. Tyliszczak, J.A. Katine, M.J. Carey, M.R. Scheinfein, H.C. Siegmann, and J. Stöhr, Phys. Rev. Lett. 100, 247201 (2008).


Extended field of view soft x-ray Fourier transform holography: toward imaging ultrafast evolution in a single shot
W. F. Schlotter, J. Lüning, Ramon Rick, Kang Chen, A. Scherz, S. Eisebitt, C. M. Günther, W. Eberhardt, O. Hellwig, and J. Stöhr, Opt. Lett. 32, 3110 (2007).

Phase imaging of magnetic nanostructures using resonant soft x-ray holography
A. Scherz, W. F. Schlotter, K. Chen, R. Rick, J. Stöhr, J. Lüning, I. McNulty, C. M. Günther, R. Radu, W. Eberhardt, O. Hellwig, and S. Eisebitt, Phys. Rev. B 76, 214410 (2007).


Time-resolved imaging of spin transfer switching: beyond the macrospin concept
Y. Acremann, J.P. Strachan, V. Chembrolu, S.D. Andrews, T. Tyliszczak, J.A. Katine, M.J. Carey, B.M. Clemens, H.C. Siegmann, and J. Stöhr, Phys. Rev. Lett. 96, 217202 (2006).

Parallel versus antiparallel interfacial coupling in exchange biased Co/FeF2
H. Ohldag, H. Shi, E. Arenholz, J. Stöhr, and D. Lederman, Phys. Rev. Lett. 96, 027203 (2006).

Multiple reference Fourier transform holography with soft x rays
W. F. Schlotter, R. Rick, K. Chen, A. Scherz, J. Stöhr, J. Lüning, S. Eisebitt, C. M. Günther, W. Eberhardt, O. Hellwig, and I. McNulty, Appl. Phys. Lett. 89, 163112 (2006).


Dissipation of spin angular momentum in magnetic switching
C. Stamm, I. Tudosa, H.C. Siegmann, J. Stöhr, A.Y. Dobin, G. Woltersdorf, B. Heinrich, A. Vaterlaus Phys. Rev. Lett. 94, 197603 (2005).

An x-ray photoemission eletron microscope using an electron mirror aberration corrector for the study of complex materials
J. Feng, E. Forest, A.A. MacDowell, M. Marcus, H. Padmore, S. Raoux, D. Dobin, A. Scholl, R. Schlueter, P. Schmid, J. Stöhr, W. Wan, D.H. Wei, and Y. Wu, J. Phys.: Condens. Matter 17, S1339 (2005).


Lensless imaging of magnetic nanostructures by x-ray spectro-holography
S. Eisebitt, J. Lüning, M. Lörgen, W. Eberhardt, J. Lüning, S. Andrews, and J. Stöhr, Nature.432, 885 (2004).

Creation of an antiferromagnetic exchange spring
A. Scholl, M. Lierati, E. Arenholz, H. Ohldag, and J. Stöhr, Phys. Rev. Lett. 92, 247201 (2004).

Vortex core-driven magnetization dynamics
S.-B. Choe, Y. Acremann, A. Scholl, A. Bauer, A. Doran, J. Stöhr, and H. A. Padmore Science 304, 420 (2004).

The ultimate speed of magnetic switching in granular recording media
I. Tudosa, C. Stamm, A.B. Kashuba, F. King, H.C. Siegmann, J. Stöhr, G. Ju, B. Lu, and D. Weller Nature. 428, 831 (2004).

Scalable approach for lensless imaging at x-ray wavelengths
S. Eisebitt, M. Lörgen, W. Eberhardt, J. Lüning, S. Andrews, and J. Stöhr, Appl. Phys. Lett. 84, 3373 (2004).


Correlation between exchange bias and pinned interfacial spins
H. Ohldag, A. Scholl, F. Nolting, E. Arenholz, S. Maat, A.T. Young, M. Carey, and J. Stöhr, Phys. Rev. Lett. 91, 017203 (2003).

Polarization effects in coherent scattering from magnetic specimen: implications for x-ray holography, lensless imaging, and correlation spectroscopy
S. Eisebitt, M. Lörgen, W. Eberhardt, J. Lüning, J. Stöhr, C.T. Rettner, O. Hellwig, E.E. Fullerton, and G. Denbeaux, Phys. Rev. B 68, 104419 (2003).

Determination of the antiferromagnetic spin axis in epitaxial LaFeO3 films by x-ray magnetic linear dichroism spectroscopy
J. Lüning, F. Nolting, A. Scholl, H. Ohldag, J.W. Seo, J. Fompeyrine, J.-P. Locquet, and J. Stöhr, Phys. Rev. B 67, 214433 (2003).


Spectroscopic identification and direct imaging of interfacial magnetic spins
H. Ohldag, T.J. Regan, J. Stöhr, A. Scholl, F. Nolting, J. Lüning, C. Stamm, S. Anders, and R.L. White, Phys. Rev. Lett. 87, 247201 (2001).

Liquid crystal alignment on carbonaceous surfaces with orientational order
J. Stöhr, M.G. Samant, J. Lüning, A.C. Callegari, P. Chaudhari, J.P. Doyle, J.A. Lacey, S.A. Lien, S.Purushothaman, J.L. Speidell, Science 292, 2299 (2001).

Atomic-beam alignment of inorganic materials for liquid-crystal displays
P. Chaudhari, et. al., Nature 411, 56 (2001).

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