C. Ritter

Publication List Details

Period

1991 - 2009

Number

159

Co-Authors

Neutron powder diffraction investigation of the structural and magnetic properties of (La1-yYy)FeAsO (2009)

Martinelli, A., Palenzona, A., Tropeano, M., Ferdeghini, C., Cimberle, M. R., Ritter, C.

The structural, magnetic and resistive properties of (La1-yYy)FeAsO compounds (y = 0.10, 0.20, 0.30) have been investigated by means of X-ray and neutron powder diffraction as well as by resistivity...

Low temperature magnetic structure of the quasi 1-dimensional magnet Ni2SiO4 (2009)

Colman, R H, Fennell, T, Ritter, C, Lau, G, Cava, R J, Wills, A S

Ni2SiO4, Liebenbergite, is an example of a quasi-one-dimensional magnet made up of frustrated corner sharing triangles of Ni2+ (S = 1) ions that propagate parallel to the b axis. Ni2SiO4 is...

Microphysical and radiative characterization of a subvisible midlevel Arctic ice cloud by airborne observations – a case study (2009)

A. Lampert, A. Ehrlich, A. Dörnbrack, O. Jourdan, G. Mioche, ...

During the Arctic Study of Tropospheric Aerosol, Clouds and Radiation (ASTAR) campaign, which was conducted in March and April 2007, an optically thin ice cloud was observed south of Svalbard at...

Airborne observations of a subvisible midlevel Arctic ice cloud: microphysical and radiative characterization (2009)

A. Lampert, A. Ehrlich, A. Dörnbrack, O. Jourdan, G. Mioche, ...

During the Arctic Study of Tropospheric Aerosol, Clouds and Radiation (ASTAR) campaign, which was conducted in March and April 2007, an optically thin ice cloud was observed at around 3 km altitude...

Observations of boundary layer, mixed-phase and multi-layer Arctic clouds with different lidar systems during ASTAR 2007 (2009)

A. Lampert, C. Ritter, A. Hoffmann, G. Mioche, A. Ehrlich, ...

During the Arctic Study of Tropospheric Aerosol, Clouds and Radiation (ASTAR), which was conducted in Svalbard in March and April 2007, tropospheric Arctic clouds were observed with two ground-based...

Ground-based lidar measurements from Ny-Ålesund during ASTAR 2007: a statistical overview (2009)

A. Hoffmann, C. Ritter, M. Stock, M. Shiobara, A. Lampert, M. Maturilli, ...

During the Arctic Study of Tropospheric Aerosol, Clouds and Radiation (ASTAR) in March and April 2007, measurements obtained at the AWIPEV Research station in Ny-Ålesund, Spitsbergen (operated by...

Aerosol distribution around Svalbard during intense easterly winds (2009)

A. Dörnbrack, I. S. Stachlewska, C. Ritter, R. Neuber

This paper reports on backscatter and depolarization measurements by an airborne lidar in the Arctic during the ASTAR 2004 campaign. A unique weather situation facilitated the observation of the...

AMALi – the Airborne Mobile Aerosol Lidar for Arctic research (2009)

I. S. Stachlewska, R. Neuber, A. Lampert, C. Ritter, G. Wehrle

The Airborne Mobile Aerosol Lidar (AMALi) is an instrument developed at the Alfred Wegener Institute for Polar and Marine Research for a trouble-free operation under the challenging weather...

On retrieval of lidar extinction profiles using Two-Stream and Raman techniques (2009)

I. S. Stachlewska, C. Ritter

The Two-Stream technique employes simultaneous measurements performed by two elastic backscatter lidars aiming at each other to sample into the same atmosphere. It allows for a direct retrieval of...

Toward Perfection: Kapellasite, Cu3Zn(OH)6Cl2, a New Model S = 1/2 Kagome Antiferromagnet (2008)

Colman, R. H., Ritter, C., Wills, A. S.

The search for the resonating valence bond (RVB) state continues to underpin many areas of condensed matter research. The RVB is made from the dimerisation of spins on different sites into...

Experimental observation of amontonian and superlubric sliding in extended nanocontacts. (2008)

Dietzel, D., Mönninghoff, T., Schwarz, U.D., Ritter, C., Fuchs, H., Schirmeisen, A.

72.Jahrestagung der Deutschen Physikalischen Gesellschaft und DPG Frühjahrstagung des Arbeitskreises Festkörperphysik, Fachverband Oberflächenphysik, Berlin, 25.-29.Februar 2008

The hemisphere-scale stratospheric impact of the Chisholm (Alberta) pyrocumulonimbus eruption. (2007)

Fromm, M., Barnes, J., Blum, U., Diner, D., Fricke, K.H., Gerding, M., ...

American Geophysical Union (AGU) Fall Meeting, San Francisco, Calif., December 11-15, 2006

High and low-temperature crystal and magnetic structures of epsilon-Fe2O3 and their correlation to its magnetic properties (2006)

Gich, M., Frontera, C., Roig, A., Taboada, E., Molins, E., Rechenberg, H. R., ...

The crystal and magnetic structures of the orthorhombic e-Fe2O3 have been studied by simultaneous Rietveld refinement of X-ray and neutron powder diffraction data in combination with Mossbauer...

Comparative study of the magnetic and electronic properties of Bi0.75A0.25MnO3 (x=2/8) with A=Ca and Sr (2006)

Garcia-Munoz, J L, Frontera, C, Beran, P, Bellido, N, Capdevila, X G, Calleja, A, ...

We present a comparative investigation of the Bi manganites with commensurate composition : Bi0.75Sr0.25MnO3 and Bi0.75Ca0.25MnO3. muSR and diffraction data confirm different structural, magnetic and...

Structural phase separation in La2/3Ba1/3MnO3: macroscopic and microscopic aspects (2005)

Beznosov, A. B., Fertman, E. L., Pal-Val, P. P., Pal-Val, L. N., Ritter, C., Rossell, M., ...

The structural phase transformation in the La2/3Ba1/3MnO3 perovskite manganite was studied by ultrasound, neutron diffraction and electron microscopy techniques. Minima of the velocity and maxima of...

Neutron inelastic scattering investigation of the magnetic excitations in Cu_2Te_2O_5X_2 (X=Br, Cl) (2005)

Crowe, S. J., Majumdar, S., Lees, M. R., Paul, D. McK., Bewley, R. I., Levett, S. J., ...

Neutron inelastic scattering investigations have been performed on the spin tetrahedral system Cu_2Te_2O_5X_2 (X = Cl, Br). We report the observation of magnetic excitations with a dispersive...

Effects of cation vacancy distribution in doped LaMnO3+delta perovskites (2005)

Malavasi, L., Ritter, C., Mozzati, M. C., Tealdi, C., Islam, M. S., Azzoni, C. B., ...

fit this paper, we report studies on the correlation between the presence and distribution of cation vacancies in doped manganites (La, M)MnO3+sigma (where M = Na, Ca) and their magnetic properties....

Variable temperature neutron powder diffraction study to determine the magnetic interactions in Sr(2)LnRuO(6) (Ln = Ho and Tb). (2004)

Parkinson, N. G., Hatton, P. D., Howard, J. A. K., Ritter, C., Ibberson, R. M., Wu, M. K.

Neutron powder diffraction has been used to study the two title compounds, Sr2HoRuO6 and Sr2TbRuO6, in order to determine the crystal and magnetic structures of the materials. Both materials have a...

Charge and orbital order in rare-earth and Bi manganites: a comparison (2003)

Garcia-Munoz, JL, Frontera, C, Aranda, MAG, Ritter, C, Llobet, A, Respaud, M, ...

A comparative investigation of the charge modulation tendencies in R-M-MnO3 and Bi-Sr-MnO3 manganites reveals remarkable differences in these series of materials. By means of magnetic,...

Anomalously high charge/orbital ordering temperature in Bi0.5Sr0.5MnO3 (2002)

Frontera, C, Garcia-Munoz, JL, Aranda, MAG, Ritter, C, Llobet, A, Ranno, L, ...

Neutron/synchrotron diffraction data and magnetic measurements provide direct evidence of charge/orbital ordering at anomalously high temperatures in Bi0.5Sr0.5MnO3, as well as in other (Bi, Sr)MnO3...

Electronic and magnetic transitions in Bi-Sr-Mn-O oxides: high temperature charge-ordering (2002)

Garcia-Munoz, JL, Frontera, C, Aranda, MAG, Ritter, C, Llobet, A, Ranno, L, ...

Neutron/synchrotron diffraction data and magnetic measurements provide direct evidence of charge/orbital ordering at anomalously high temperatures in (Bi,Sr)MnO3 manganites. We report oil the...

First Order Transition in the Spin Dynamics of Geometrically Frustrated Yb2Ti2O7 (2002)

Hodges, J. A., Bonville, P., Forget, A., Yaouanc, A., De Reotier, P. Dalmas, Andre, G., ...

Using neutron diffraction, 170Yb Mossbauer and muSR spectroscopies, we have examined the pyrochlore Yb2Ti2O7 where the Yb3+ S'=1/2 ground state has planar anisotropy. Below ~0.24K, the temperature of...

Low-temperature charge and magnetic order of Bi0.5Sr0.5MnO3 (2001)

Frontera, C, Garcia-Munoz, JL, Aranda, MAG, Ritter, C, Llobet, A, Respaud, M, ...

Low-temperature structural and magnetic properties of Bi0.5Sr0.5MnO3 investigated by neutron and synchrotron x-ray diffraction are reported. High-resolution powder diffraction data evidenced...

Magnetic-field -induced structural changes in the electron doped manganites: CaxSm1-xMnO3 (x = 0.8, 0.85) (2001)

Mahendiran, R., Algarabel, P. A., Morellon, L., Marquina, C., Ibarra, M. R., Maignan, A., ...

We studied the correlation between magnetic, electrical, structural, and magnetostriction properties of the electron doped manganites Ca$_x$Sm$_{1-x}$MnO$_3$ (x = 0.85, 0.8). The paramagnetic to...

Room temperature charge and orbital ordering and phase coexistence in Bi0.5Sr0.5MnO3 (2001)

Frontera, C, Garcia-Munoz, JL, Llobet, A, Aranda, MAG, Ritter, C, Respaud, M, ...

We present high-resolution neutron and synchrotron powder diffraction, magnetotransport, and magnetization measurements on Bi0.5Sr0.5MnO3 We report that, for the whole range of temperature 1.5 K less...

Charge-order and phase coexistence in Bi1/2Sr1/2MnO3 (2001)

Frontera, C, Garcia-Munoz, JL, Llobet, A, Aranda, MAG, Ritter, C, Respaud, M, ...

We present high-resolution neutron and synchrotron powder diffraction, magnetotransport and magnetization measurements on Bi1/2Sr1/2MnO3. We report that, for the whole range of temperature 1.5 K less...

Correlation Functions and Corner Transfer Matrix of the Chiral Potts Model (2000)

Ritter, C., Von Gehlen, G.

We use the Density Matrix Renormalization Group technique to compute correlation functions of the Z_3-chiral Potts quantum chain in the massive regimes. Chains of up to 70 sites are used and a clear...

Magnetic and structural properties of the double-perovskite Ca_2FeReO_6 (2000)

Westerburg, W., Lang, O., Felser, C., Tremel, W., Waldeck, M., Renz, F., ...

We suceeded in the preparation of polycrystalline Ca_2FeReO_6 which has a Curie temperature of 540 K, the highest value of all magnetic perovskites investigated up to now. This material has been...

Direct evidence of phase segregation and magnetic-field-induced structural transition in $Nd_{0.5}Sr_{0.5}MnO_3$by neutron diffraction (2000)

Ritter, C, Mahendiran, R, Ibarra, MR, Morellon, L, Maignan, A, Raveau, B, ...

We present direct evidence of the phase segregation and magnetic-field-induced structural transition in $Nd_{0.5}Sr_{0.5}MnO_3$ as proposed earlier [R. Mahendiran et al., Phys. Rev. Lett. 82, 2191...

Direct evidence of phase segregation and magnetic-field-induced structural transition in $Nd_{0.5}Sr_{0.5}MnO_3$by neutron diffraction (2000)

Ritter, C, Mahendiran, R, Ibarra, MR, Morellon, L, Maignan, A, Raveau, B, ...

We present direct evidence of the phase segregation and magnetic-field-induced structural transition in $Nd_{0.5}Sr_{0.5}MnO_3$ as proposed earlier [R. Mahendiran et al., Phys. Rev. Lett. 82, 2191...

Moisture Absorbing Anti-Arcing Coating and Method For Applying Same (1998)

Ritter,C., Kreps,R. W.

A moisture absorbing, anti-arcing compound comprises a mixture of a moisture active isocyanate resin and a generic anti-arcing compound. The isocyanate resin reacts with residual moisture in a high...

Indomethacin decreases viscosity of gallbladder bile in patients with cholesterol gallstone disease (1993)

Ritter, C., Niemeyer, A., Lange, V., Möhrle, W., Richter, Werner O., Meyer, L., ...

There is experimental evidence that inhibition of cyclooxygenase with nonsteroidal anti-inflammatory drugs may decrease cholesterol gall-stone formation and mitigate biliary pain in gall-stone...

Functional homologs of the Arabidopsis RPM1 disease resistance gene in bean and pea.

Dangl, J L, Ritter, C, Gibbon, M J, Mur, L A, Wood, J R, Goss, S, ...

We showed that a bacterial avirulence (avr) gene function, avrPpiA1, from the pea pathogen Pseudomonas syringae pv pisi, is recognized by some, but not all, genotypes of Arabidopsis. Thus, an avr...

Interference between Two Specific Pathogen Recognition Events Mediated by Distinct Plant Disease Resistance Genes.

Ritter, C, Dangl, JL

We demonstrate that the interaction of the avirulence gene avrRpt2 and the cognate resistance gene RPS2 interferes with the interaction of avrRpm1-RPM1 in Arabidopsis. Interference is mediated...

Retinoic acid suppresses parathyroid hormone (PTH) secretion and PreproPTH mRNA levels in bovine parathyroid cell culture.

MacDonald, P N, Ritter, C, Brown, A J, Slatopolsky, E

1,25-dihydroxyvitamin D3[1,25(OH)2D3] suppresses parathyroid hormone (PTH) gene transcription. Recent evidence suggests that retinoid X receptors are involved in 1,25(OH)2D3-mediated transcriptional...

Phosphorus restriction prevents parathyroid gland growth. High phosphorus directly stimulates PTH secretion in vitro.

Slatopolsky, E, Finch, J, Denda, M, Ritter, C, Zhong, M, Dusso, A, ...

Dietary phosphorus (P) restriction is known to ameliorate secondary hyperparathyroidism in renal failure patients. In early renal failure, this effect may be mediated by an increase in 1,25-(OH)2D3,...

Functional homologs of the Arabidopsis RPM1 disease resistance gene in bean and pea.

Dangl, J L, Ritter, C, Gibbon, M J, Mur, L A, Wood, J R, Goss, S, ...

We showed that a bacterial avirulence (avr) gene function, avrPpiA1, from the pea pathogen Pseudomonas syringae pv pisi, is recognized by some, but not all, genotypes of Arabidopsis. Thus, an avr...

Interference between Two Specific Pathogen Recognition Events Mediated by Distinct Plant Disease Resistance Genes.

Ritter, C, Dangl, JL

We demonstrate that the interaction of the avirulence gene avrRpt2 and the cognate resistance gene RPS2 interferes with the interaction of avrRpm1-RPM1 in Arabidopsis. Interference is mediated...

Retinoic acid suppresses parathyroid hormone (PTH) secretion and PreproPTH mRNA levels in bovine parathyroid cell culture.

MacDonald, P N, Ritter, C, Brown, A J, Slatopolsky, E

1,25-dihydroxyvitamin D3[1,25(OH)2D3] suppresses parathyroid hormone (PTH) gene transcription. Recent evidence suggests that retinoid X receptors are involved in 1,25(OH)2D3-mediated transcriptional...

Phosphorus restriction prevents parathyroid gland growth. High phosphorus directly stimulates PTH secretion in vitro.

Slatopolsky, E, Finch, J, Denda, M, Ritter, C, Zhong, M, Dusso, A, ...

Dietary phosphorus (P) restriction is known to ameliorate secondary hyperparathyroidism in renal failure patients. In early renal failure, this effect may be mediated by an increase in 1,25-(OH)2D3,...

Profile Methods.

Ritter, C., Bates, D.M.

regression analysis ; poverty