Atomic multiplet calculation of 3d_{5/2} -> 4f resonant x-ray diffraction from Ho metal (2008)
Haverkort, M. W., Schüßler-Langeheine, C., Chang, C. F., Buchholz, M., Wu, H. -H., Ott, H., ...
We compare for Ho metal the x-ray absorption spectrum and the resonant soft x-ray diffraction spectra obtained at the $3d_{5/2} \to 4f$ ($M_5$) resonance for the magnetic 1st and 2nd order...
Resonant soft x-ray scattering from stepped surfaces of SrTiO3 (2008)
Schlappa, J., Schüßler-Langeheine, C., Chang, C. F., Hu, Z., Schierle, E., Ott, H., ...
We studied the resonant diffraction signal from stepped surfaces of SrTiO3 at the Ti 2p -> 3d (L2,3) resonance in comparison with x-ray absorption (XAS) and specular reflectivity data. The steps on...
Gericke, T., Wuertz, P., Reitz, D., Utfeld, C., Ott, H.
We report on the production of a F=1 spinor condensate of 87Rb atoms in a single beam optical dipole trap formed by a focused CO2 laser. The condensate is produced 13mm below the tip of a scanning...
Konings, S., Schuessler-Langeheine, C., Ott, H., Weschke, E., Schierle, E., Goedkoop, J. B.
We report the direct observation of slow fluctuations of helical antiferromagnetic domains in an ultra-thin holmium film using coherent resonant magnetic x-ray scattering. We observe a gradual...
A Scanning Electron Microscope for Ultracold Atoms (2006)
Gericke, T., Utfeld, C., Hommerstad, N., Ott, H.
We propose a new technique for the detection of single atoms in ultracold quantum gases. The technique is based on scanning electron microscopy and employs the electron impact ionization of trapped...
Direct observation of t2g orbital ordering in magnetite (2006)
Schlappa, J., Schuessler-Langeheine, C., Chang, C. F., Ott, H., Tanaka, A., Hu, Z., ...
Using soft-x-ray diffraction at the site-specific resonances in the Fe L23 edge, we find clear evidence for orbital and charge ordering in magnetite below the Verwey transition. The spectra show...
Butschak, G., Karsten, U., Schelhaas, U., Ott, H., Emmendörffer, A., Niemeyer, B., ...
In a search for novel immunostimulating substances we detected that culture supernatants of the gram-positive phytopathogenic bacterium, Rhodococcus fascians, were able to induce cytokine release...
Soft x-ray magnetic circular dichroism study on Gd-doped EuO thin films (2005)
Ott, H., Heise, S. J., Sutarto, R., Hu, Z., Chang, C. F., Hsieh, H. H., ...
We report on the growth and characterization of ferromagnetic Gd-doped EuO thin films. We prepared samples with Gd concentrations up to 11% by means of molecular beam epitaxy under distillation...
X-Ray Scattering at Lanthanide M5 Resonances: Application to Magnetic Depth Profiling (2005)
Ott, H., Schuessler-Langeheine, C., Schierle, E., Grigoriev, A. Yu., Leiner, V., Zabel, H., ...
Quantitative analyses of x-ray scattering from thin films of Ho and Dy metal at the M_5 resonances result in values of the optical constants and the magnetic scattering lengths f_m, with f_m as large...
Hwang, J. I., Ishida, Y., Kobayashi, M., Hirata, H., Takubo, K., Mizokawa, T., ...
We have studied the electronic structure of the diluted magnetic semiconductor Ga$_{1-x}$Mn$_{x}$N ($x$ = 0.0, 0.02 and 0.042) grown on Sn-doped $n$-type GaN using photoemission and soft x-ray...
Spectroscopy of stripe order in La1.8Sr0.2NiO4 using resonant soft x-ray diffraction (2005)
Schuessler-Langeheine, C., Schlappa, J., Tanaka, A., Hu, Z., Chang, C. F., Schierle, E., ...
Strong resonant enhancements of the charge-order and spin-order superstructure-diffraction intensities in La1.8Sr0.2NiO4 are observed when x-ray energies in the vicinity of the Ni L2,3 absorption...
Atom Interferometry in a Vertical Optical Lattice (2004)
Modugno, G., De Mirandes, E., Ferlaino, F., Ott, H., Roati, G., Inguscio, M.
We have studied the interference of degenerate quantum gases in a vertical optical lattice. The coherence of the atoms leads to an interference pattern when the atoms are released from the lattice....
Radio Frequency Selective Addressing of Localized Particles in a Periodic Potential (2004)
Ott, H., De Mirandes, E., Ferlaino, F., Roati, G., Türck, V., Modugno, G., ...
We study the localization and addressability of ultra cold atoms in a combined parabolic and periodic potential. Such a potential supports the existence of localized stationary states and we show...
Atom interferometry with trapped Fermi gases (2004)
Roati, G., De Mirandes, E., Ferlaino, F., Ott, H., Modugno, G., Inguscio, M.
We realize an interferometer with an atomic Fermi gas trapped in an optical lattice under the influence of gravity. The single-particle interference between the eigenstates of the lattice results in...
Insulating Behavior of a Trapped Ideal Fermi Gas (2004)
Pezze', L., Pitaevskii, L., Smerzi, A., Stringari, S., Modugno, G., DeMirandes, E., ...
We investigate theoretically and experimentally the center-of-mass motion of an ideal Fermi gas in a combined periodic and harmonic potential. We find a crossover from a conducting to an insulating...
Collisionally Induced Transport in Periodic Potentials (2003)
Ott, H., De Mirandes, E., Ferlaino, F., Roati, G., Modugno, G., Inguscio, M.
We study the transport of ultra cold atoms in a tight optical lattice. For identical fermions the system is insulating under an external force while for bosonic atoms it is conducting. This reflects...
In situ photoemission study of the room-temperature ferromagnet ZnGeP_2:Mn (2003)
Ishida, Y., Sarma, D. D., Okazaki, K., Okabayashi, J., Hwang, J. I., Ott, H., ...
The chemical states of the ZnGeP$_{2}$:Mn interface, which shows ferromagnetism above room-temperature, has been studied by photoemission spectroscopy. Mn deposition on the ZnGeP$_2$ substrate heated...
An Overview of the VERTIKATOR Project and Results of Alpine Pumping (2003)
Lugauer, M., Berresheim, H., Corsmeier, U., Dabas, A., Dyck, W., Emeis, S. ., ...
Buschmann, J., Dasenbrock, C., Fuhst, R., Pohlmann, G., Bartsch, W., Creutzenberg, O., ...
Aim of the study was to investigate the potential toxic effects of di-n-butylamine (DBA), a known skin and eye irritating compound, on the respiratory tract after inhalation exposure for up to 91...
Nonlinear Dynamics of a Bose-Einstein Condensate in a Magnetic Waveguide (2002)
Ott, H., Fortágh, J., Kraft, S., Günther, A., Komma, D., Zimmermann, C.
We have studied the internal and external dynamics of a Bose-Einstein condensate in an anharmonic magnetic waveguide. An oscillating condensate experiences a strong coupling between the center of...
Dynamics of a Bose-Einstein Condensate in an Anharmonic Trap (2002)
Ott, H., Fortagh, J., Zimmermann, C.
We present a theoretical model to describe the dynamics of Bose-Einstein condensates in anharmonic trapping potentials. To first approximation the center-of-mass motion is separated from the internal...
Bose-Einstein Condensates in Magnetic Waveguides (2002)
Fortagh, J., Ott, H., Kraft, S., Guenther, A., Zimmermann, C.
In this article, we describe an experimental system for generating Bose-Einstein condensates and controlling the shape and motion of the condensate by using miniaturised magnetic potentials. In...
Anomalous Longitudinal Magnetic Field near the Surface of Copper Conductors (2002)
Kraft, S., Guenther, A., Ott, H., Wharam, D., Zimmermann, C., Fortagh, J.
We have used ultracold atoms to characterize the magnetic field near the surface of copper conductors at room temperature carrying currents between 0.045 A and 2 A. In addition to the usual circular...
Microelectromagnets for Trapping and Manipulating Ultracold Atomic Quantum Gases (2002)
Fortagh, J., Ott, H., Schlotterbeck, G., Zimmermann, C., Herzog, B., Wharam, D.
We describe the production and characterization of microelectromagnets made for trapping and manipulating atomic ensembles. The devices consist of 7 fabricated parallel copper conductors 3 micrometer...
Surface Effects in Magnetic Microtraps (2002)
Fortagh, J., Ott, H., Kraft, S., Zimmermann, C.
We have investigated Bose-Einstein condensates and ultra cold atoms in the vicinity of a surface of a magnetic microtrap. The atoms are prepared along copper conductors at distances to the surface...
Bose-Einstein Condensation in a Surface Micro Trap (2001)
Ott, H., Fortagh, J., Schlotterbeck, G., Grossmann, A., Zimmermann, C.
Bose-Einstein condensation has been achieved in a magnetic surface micro trap with 4x10^5 87Rb atoms. The strongly anisotropic trapping potential is generated by a microstructure which consists of...
New inorganic-organic copolymers (Ormocer's) for dental applications (1994)
Wolter, H., Storch, W., Ott, H.
Urethane- and thioether (meth)acrylate alkoxysilanes have beenused, as sol-gel precursors, for the preparation of a special family of inorganic/organic copolymers (ORMOCER s). The basic silane type...
Wolter, H., Storch, W., Ott, H.
Due to the unesthetic appearance, the toxicologigal problems of mercury and the galvanic corrision there is a need for a posterior dental filling material which is able to substitute the amalgam...
LOW TEMPERATURE PHASE TRANSITIONS IN THE HEAVY ELECTRON COMPOUND YbSb (1988)
Bonville, P., Broto, J., Fert, A., Gonzalez-Jimenez, F., Hamzic, A., Hulliger, F., ...
Using Mössbauer spectroscopy on 170Yb, we detected two low temperature phase transitions in the heavy electron pnictide YbSb. Below TN = 0.32 K antiferromagnetic ordering of Yb3+ develops, and...
LOW TEMPERATURE PHASE TRANSITIONS IN THE HEAVY ELECTRON COMPOUND YbSb (1988)
Bonville, P., Broto, J., Fert, A., Gonzalez-Jimenez, F., Hamzic, A., Hulliger, F., ...
Using Mössbauer spectroscopy on 170Yb, we detected two low temperature phase transitions in the heavy electron pnictide YbSb. Below TN = 0.32 K antiferromagnetic ordering of Yb3+ develops, and...
LOW TEMPERATURE PHASE TRANSITIONS IN THE HEAVY ELECTRON COMPOUND YbSb (1988)
Bonville, P., Broto, J., Fert, A., Gonzalez-Jimenez, F., Hamzic, A., Hulliger, F., ...
Using Mössbauer spectroscopy on 170Yb, we detected two low temperature phase transitions in the heavy electron pnictide YbSb. Below TN = 0.32 K antiferromagnetic ordering of Yb3+ develops, and...
Some future-research priorities on ecophysiology of acid stress in aquatic organisms (1987)
Wood, C., Wendelaar Bonga, S.E., Vanderborght, O., Ott, H., Johannessen, M., Higler, B., ...
Crystal-field effects and phase transitions in Rocksalt-type cerium compounds (1979)
We discuss the general behaviour of crystal-field and exchange interactions in Ce monopnictides and Ce monochalcogenides.
Crystal-field effects and phase transitions in Rocksalt-type cerium compounds (1979)
We discuss the general behaviour of crystal-field and exchange interactions in Ce monopnictides and Ce monochalcogenides.
Crystal-field effects and phase transitions in Rocksalt-type cerium compounds (1979)
We discuss the general behaviour of crystal-field and exchange interactions in Ce monopnictides and Ce monochalcogenides.
MAGNETIC EXCITATIONS AND THE COOPERATIVE JAHN-TELLER TRANSITION IN PrCu2 (1978)
Kjems, J., Ott, H., Shapiro, S., Andres, K.
The structural distortion in PrCu2 below the Jahn-Teller transition at TD = 7.3 K has been measured by neutron diffraction. The primary order parameter is found to be the ezx strain of the...
SUPERCONDUCTING AND MAGNETIC PROPERTIES OF ErRh4B4 (1978)
Ott, H., Fertig, W., Johnston, D., Maple, M., Matthias, B.
We have measured the thermal expansion, the magnetization, the magnetostriction and the ac electrical resistance of ErRh4B4 at low temperatures. Special emphasis is given to the influence of magnetic...
MAGNETIC EXCITATIONS AND THE COOPERATIVE JAHN-TELLER TRANSITION IN PrCu2 (1978)
Kjems, J., Ott, H., Shapiro, S., Andres, K.
The structural distortion in PrCu2 below the Jahn-Teller transition at TD = 7.3 K has been measured by neutron diffraction. The primary order parameter is found to be the ezx strain of the...
SUPERCONDUCTING AND MAGNETIC PROPERTIES OF ErRh4B4 (1978)
Ott, H., Fertig, W., Johnston, D., Maple, M., Matthias, B.
We have measured the thermal expansion, the magnetization, the magnetostriction and the ac electrical resistance of ErRh4B4 at low temperatures. Special emphasis is given to the influence of magnetic...
MAGNETIC EXCITATIONS AND THE COOPERATIVE JAHN-TELLER TRANSITION IN PrCu2 (1978)
Kjems, J., Ott, H., Shapiro, S., Andres, K.
The structural distortion in PrCu2 below the Jahn-Teller transition at TD = 7.3 K has been measured by neutron diffraction. The primary order parameter is found to be the ezx strain of the...
SUPERCONDUCTING AND MAGNETIC PROPERTIES OF ErRh4B4 (1978)
Ott, H., Fertig, W., Johnston, D., Maple, M., Matthias, B.
We have measured the thermal expansion, the magnetization, the magnetostriction and the ac electrical resistance of ErRh4B4 at low temperatures. Special emphasis is given to the influence of magnetic...
Clinical response to therapy with thymopoietin pentapeptide (TP-5) in rheumatoid arthritis
Veys, E. M., Huskisson, E. C., Rosenthal, M., Vischer, T. L., Mielants, H., Thrower, P. A., ...
The effect of thymopoietin pentapeptide (TP-5) was evaluated in patients with rheumatoid arthritis (RA). Ninety-two patients were divided into 3 groups, namely, placebo, TP-5 intramuscularly (IM) 1...
Three brothers with algodystrophy of the hip.
We describe the clinical features of algodystrophy of the hip in 3 brothers, probably the first familial presentation of this disease to be reported. The symptoms and evolution of the disease are as...
HLA-B27 antigen in diagnosis of atypical seronegative inflammatory arthropathy.
Joliat, G, Ferro, A, Jeannet, M, Ott, H
Eighteen patients with an inflammatory pauciarticular peripheral arthropathy not typical of any known entity showed an asymmetrical pattern of disease, with a predilection for the lower extremities....