Magnetic ordering in electronically phase separated Sr/O co-doped La(2-x)Sr(x)CuO(4+y) (2009)
Udby, L., Andersen, N. H., Chou, F. C., Christensen, N. B., Emery, S. B., Lefmann, K., ...
We present results of magnetic neutron diffraction experiments on the co-doped super-oxygenated La(2-x)Sr(x)CuO(4+y) (LSCO+O) system with x=0.09. The spin-density wave has been studied and we find...
Field-induced magnetic phases and electric polarization in LiNiPO4 (2009)
Jensen, T. B. S., Christensen, N. B., Kenzelmann, M., Rønnow, H. M., Niedermayer, C., Andersen, N. H., ...
Neutron diffraction is used to probe the (H,T) phase diagram of magneto-electric (ME) LiNiPO4 for magnetic fields along the c-axis. At zero field the Ni spins order in two antiferromagnetic phases....
Field-induced magnetic phases and electric polarization in LiNiPO4 (2009)
N.B. Christensen, M. Kenzelmann, H.M. Rønnow, C. Niedermayer, ...
Journal article
In-situ synchrotron x-ray study of MgB2 formation when doped by SiC 2007-09-16 - 2007-09-16 (2008)
A.B. Abrahamsen, N.H. Andersen, M. Herrmann, ...
Contribution to a conf. proceeding (journal)
A.B. Abrahamsen, N.H. Andersen, K. Saksl
Contribution to a conf. proceeding (journal)
Antiferromagnetic ordering in superconducting ${\bf YBa_2Cu_3O_{6.5}}$ (2006)
Sidis, Y., Ulrich, C., Bourges, P., Bernhard, C., Niedermayer, C., Regnault, L. P., ...
Commensurate antiferromagnetic ordering has been observed in the superconducting high-$Tc$ cuprate ${\rm YBa_{2}Cu_{3}O_{6.5}}$ (${\rm T_{c}}$=55 K) by polarized and unpolarized elastic neutron...
Bahl, C. R. H., Lefmann, K., Abrahamsen, A. B., Ronnow, H. M., Saxild, F., Jensen, T. B. S., ...
Recently a monochromatic multiple data taking mode has been demonstrated for diffraction experiments using a RITA type cold neutron spectrometer with a multi-bladed analyser and a position-sensitive...
O. Eibl, B. Birajdar, N.H. Andersen, ...
Contribution to a conf. proceeding (journal)
Phonon-induced quadrupolar ordering of the magnetic superconductor TmNi2B2C (2006)
N.H. Andersen, J. Jensen, M. V. Zimmermann, R. Pinholt, ...
Journal article
Magnetic and quadrupolar ordering in TmNi2B2C 2005-11-28 - 2005-12-02 (2006)
N.H. Andersen, J. Jensen, R. Pinholt, ...
Contribution to a conf. proceeding (journal)
In situ investigations of phase transformations in Fe-sheathed MgB2 wires (2006)
R. Pinholt, N.H. Andersen, P. Kovac, I. Husek, ...
Journal article
N.H. Andersen, R. Pinholt, P. Kova, ...
Contribution to a conf. proceeding (journal)
Phonon-induced quadrupolar ordering of the magnetic superconductor TmNi$_2$B$_2$C (2005)
Andersen, N. H., Jensen, J., Jensen, T. B. S., Zimmermann, M. V., Pinholt, R., Abrahamsen, A. B., ...
We present synchrotron x-ray diffraction studies revealing that the lattice of thulium borocarbide is distorted below T_Q = 13.5 K at zero field. T_Q increases and the amplitude of the displacements...
High-energy Cu spin excitations in PrBa2Cu3O6+x (2005)
Boothroyd, A. T., Andersen, N. H., Larsen, B. H., Zhokhov, A. A., Frost, C. D., Adroja, D. T.
This paper describes high-energy neutron inelastic scattering measurements of propagating magnetic excitations in PrBa2Cu3O6+x (x approx 0.2 and 0.93). The measurements probe the acoustic and optic...
Phonon dispersion relations in PrBa§2Cu§3O§6§+§x(x~0.2). (2004)
Gardiner, C.H., Boothroyd, A.T., Larsen, B.H., Reichardt, W., Zhokhov, A.A., Andersen, N.H., ...
Physical Review B, 69(2004) S.092302/1-4
Phonon Dispersion Relations in PrBa2Cu3O6+x (x ~ 0.2) (2003)
Gardiner, C. H., Boothroyd, A. T., Larsen, B. H., Reichardt, W., Zhokhov, A. A., Andersen, N. H., ...
We report measurements of the phonon dispersion relations in non-superconducting, oxygen-deficient PrBa2Cu3O6+x (x ~ 0.2) by inelastic neutron scattering. The data are compared with a model of the...
Gilardi, R., Mesot, J., Drew, A. J., Divakar, U., Lee, S. L., Andersen, N. H., ...
We report on a small angle neutron scattering study of the vortex lattice in overdoped La{2-x}Sr{x}CuO{4} (x=0.2) up to high magnetic fields (9.5 Tesla) applied perpendicular to the CuO2 planes. At...
Andersen, N. H., Poulsen, S. H., Helleberg, K., Ivarsen, P., Knudsen, S. T., Mogensen, C. E.
Aims: To investigate left ventricular systolic and diastolic function in patients with essential hypertension and diabetes mellitus associated with hypertension by the myocardial performance index...
Frello, T., Andersen, N.H., Baziljevich, M., Johansen, T.H., Grivel, J.C., Poulsen, H.F., ...
Physical Review B, 67(2003) S.024509/1-5
Lippmann, T., Blaha, P., Andersen, N.H., Henning, F., Poulsen,H.F., Wolf, T., ...
Acta Crystallographica A, 59(2003) S.437-51
Coupled Magnetic Excitations in Single Crystal PrBa2Cu3O6.2 (2001)
Lister, S. J. S., Boothroyd, A. T., Andersen, N. H., Larsen, B. H., Zhokhov, A. A., Christensen, A. N., ...
The dispersion of the low-energy magnetic excitations of the Pr sublattice in PrBa2Cu3O6.2 is determined by inelastic neutron scattering measurements on a single crystal. The dispersion, which shows...
Eskildsen, M. R., Abrahamsen, A. B., Kogan, V. G., Gammel, P. L., Mortensen, K., Andersen, N. H., ...
We have investigated the temperature dependence of the H || c flux line lattice structural phase transition from square to hexagonal symmetry, in the tetragonal superconductor LuNi_2B_2C (T_c = 16.6...
Antiferromagnetic ordering in superconducting ${\bf YBa_2Cu_3O_{6.5}}$ (2001)
Sidis, Y., Ulrich, C., Bourges, P., Bernhard, C., Niedermayer, C., Regnault, L. P., ...
Commensurate antiferromagnetic ordering has been observed in the superconducting high-$Tc$ cuprate ${\rm YBa_{2}Cu_{3}O_{6.5}}$ (${\rm T_{c}}$=55 K) by polarized and unpolarized elastic neutron...
Antiferromagnetic Ordering in Superconducting YBa2Cu3O6.5 (2001)
Sidis, Y., Ulrich, C., Bourges, P., Bernhard, C., Niedermayer, C., Regnault, L. P., ...
Flux Line Lattice Reorientation in the Borocarbide Superconductors with H || a (2001)
Abrahamsen, A. B., Andersen, N. H., Bishop, D. J., Canfield, P. C., Eskildsen, M. R., Gammel, P. L., ...
Coupled Magnetic Excitations in Single Crystal PrBa2Cu3O6.2 (2001)
Andersen, N. H., Boothroyd, A. T., Larsen, B. H., Lister, S. J. S., Zhokhov, A. A.
Topological analysis of YBa§2Cu§3O§6§.§9§8.: I. Critical points. (2001)
Lippmann, T., Andersen, N.H., Wolf, T., Schneider, J.R.
Lebech, B. [Hrsg.]
Lippmann, T., Andersen, N.H., Wolf, T., Schneider, J.R.
Lebech, B. [Hrsg.]
Topological analysis of YBa§2Cu§3O§6§.§9§8. III. Interatomic surfaces. (2001)
Lippmann, T., Andersen, N.H., Wolf, T., Schneider, J.R.
Jahresbericht 2000 = Annual Report Hamburger Synchrotronstrahlungslabor HASYLAB am Deutschen Elektronen-Synchrotron DESY Part I S.633-34
Frello, T., Andersen, N.H., Madsen, J., Abrahamsen, A.B., Zimmermann, M.von, Niemöller, T., ...
Physical Review B, 61(2000) S.R9253
Charge density studies of YBa§2Cu§3O§6§.§9§8. (2000)
Lippmann, T., Andersen, N.H., Wolf, T., Schneider, J.R.
Risoe-R-1156(EN) (February 2000) S.33
Käll, M., Zimmermann, M.von, Andersen, N.H., Madsen, J., Frello, T., Poulsen, H.F., ...
Europhysics Letters, 51(2000) S.447-53
Interdependence of magnetism and superconductivity in the borocarbide TmNi2B2C (1999)
Noergaard, K., Eskildsen, M. R., Andersen, N. H., Jensen, J., Hedegaard, P., Klausen, S. N., ...
We have discovered a new antiferromagnetic phase in TmNi2B2C by neutron diffraction. The ordering vector is Q_A = (0.48,0,0) and the phase appears above a critical in-plane magnetic field of 0.9 T....
Zimmermann, M. V., Frello, T., Andersen, N. H., Madsen, J., Käll, M., Schmidt, O., ...
High energy x-ray diffraction is used to investigate the bulk oxygen ordering properties of YBa_2Cu_3O_{6+x}. Superstructures of Cu-O chains aligned along the b axis and ordered with periodicity ma,...
Charge stripes seen with x-rays in La_(1.45)Nd_(0.4)Sr_(0.15)CuO_(4) (1999)
Niemoeller, T., Ichikawa, N., Frello, T., Huennefeld, H., Andersen, N. H., Uchida, S., ...
Superstructure reflections due to the ordering of holes into stripes in La_(1.45)Nd_(0.4)Sr_(0.15)CuO_4 have been studied with high energy x-ray diffraction. These reflections have been observed...
Magnetic excitations and pressure studies on single-crystals of PrBa§2Cu§3O§6§+§x. (1999)
Lister, S.J.S., Boothroyd, A.T., Andersen, N.H., Zhokhov, A.A., Christensen, A.N., Wolf, T.
1st Euroconf.on Anomalous Complex Superconductors, Agia Pelagia, GR, September 26 - October 3, 1998
Superstructure formation and the structural phase diagram of YBa§2Cu§3O§6§+§x. (1999)
Andersen, N.H., Zimmermann, M.von, Frello, T., Käll, M., Mönster, D., Lindgärd, P.A., ...
1st Euroconf.on Anomalous Complex Superconductors, Agia Pelagia, GR, September 26 - October 3, 1998
Incommensurate magnetism in non-superconducting PrBa§2Cu§3O§6§.§9§2. (1999)
Boothroyd, A.T., Hill, J.P., Mc Morrow, D.F., Andersen, N.H., Stunault, A., Vettier, C., ...
1st Euroconf.on Anomalous Complex Superconductors, Agia Pelagia, GR, September 26 - October 3, 1998
Brecht, E., Schweiss, P., Wolf, T., Boothroyd, A.T., Reynolds, J.M., Andersen, N.H., ...
Physical Review B, 59(1999) S.3870-78
Magnetic ordering of Nd`3`+ in single-crystal NdBa§2Cu§3O§6§+§x. (1999)
Boothroyd, A.T., Reynolds, J.M., Andersen, N.H., Brecht, E., Wolf, T., Chowdhury, A.J.S.
Physical Review B, 60(1999) S.1400-08
Magentic order of the Nd sublattice in NdBa§2Cu§3O§6§+§x (x=0.1, 0.95). (1999)
Boothroyd, A.T., Reynolds, J.M., Andersen, N.H., Brecht, E., Wolf, T.
RISOE-R-1099(EN) (April 99) S.41
Superstructure formation and structural phase diagram of YBa§2Cu§3O§6§+§x. (1999)
Frello, T., Andersen, N.H., Käll, M., Madsen, J., Zimmermann, M.von, Niemöller, T., ...
RISOE-R-1099(EN) (April 99) S.43
Pressure study of the magnetic order in PrBa§2Cu§3O§6§+§x. (1999)
Lister, S.J.S., Boothroyd, A.T., Andersen, N.H., Wolf, T.
RISOE-R-1099(EN) (April 99) S.45
Flux turbulence in NdBa§2Cu§3O§6§+§x and underdoped YBa§2Cu§3O§6§+§x single crystals. (1999)
Frello, T., Baziljevich, M., Johansen, T.H., Andersen, N.H., Wolf, T., Koblischka, M.R.
Physical Review B, 59(1999) S.R6639
Brecht, E., Wolf, T., Schweiss, P., Schmahl, W.W., Boothroyd, A.T., Reynolds, J., ...
RISOE-R-1014(EN) S.41
Incommensurate Magnetism in PrBa§2Cu§3O§6§+§x. (1998)
Boothroyd, A.T., Andersen, N.H., Hill, J.P., Wolf, T.
Nielsen, M. et al. [Hrsg.]
Frello, T., Baziljevich, M., Johansen, T.H., Andersen, N.H., Wolf, T.
Nielsen, M. et al. [Hrsg.]
Oxygen ordering properties of NdBa§2Cu§3O§6§,§5 studied by hard x-ray diffraction. (1998)
Frello, T., Madsen, J., Abrahamsen, A., Andersen, N.H., Niemöller, T., Zimmermann, M.von, ...
Nielsen, M. et al. [Hrsg.]
Incommensurate magnetism in PrBa§2Cu§3O§6§.§9§2. (1998)
Hill, J.P., Boothroyd, A.T., Andersen, N.H., Brecht, E., Wolf, T.
Physical Review B, 58(1998) S.11211-14
Brecht, E., Schmahl, W.W., Schmenn, S., Lütgemeier, H., Andersen, N.H., Lebech, B., ...
5.Jahrestagung der Deutschen Gesellschaft für Kristallographie, Hamburg, 10.-12.März 1997
Brecht, E., Boothroyd, A.T., Reynolds, J., Andersen, N.H., Schmenn, S., Lütgemeier, H., ...
LSF User Meeting, Stockholm, S, March 20-23, 1997
Boothroyd, A.T., Longmore, A., Andersen, N.H., Brecht, E., Wolf, T.
Physical Review Letters, 78(1997) S.130-33
Brecht, E., Schmahl, W.W., Fuess, H., Schmenn, S., Lütgemeier, H., Andersen, N.H., ...
Physical Review B, 56(1997) S.940-48
Evidence for enhancement of T§c by ortho-II ordering in YBa§2Cu§3O§6§.§5. (1997)
Madsen, J., Andersen, N.H., Zimmermann, M.von, Wolf, T.
RISOE-R-933(EN) S.47
Frello, T., Andersen, N.H., Madsen, J., Käll, M., Schmidt, O., Zimmermann, M.von, ...
RISOE-R-933(EN) S.41
Magnetic structures in NdBa§2Cu§3O§6§+§x. (1997)
Boothroyd, A.T., Reynolds, J.M., Brecht, E., Wolf, T., Andersen, N.H.
RISOE-R-933(EN) S.49
Frello, T., Andersen, N.H., Madsen, J., Käll, M., Zimmermann, M.von, Schmidt, O., ...
Proc.of the 5th Internat.Conf.on Materials and Mechanisms of Superconductivity High-Temperature Superconductors (M2S-HTSC), Beijing, China, February 28 - March 4, 1997
Antiferromagnetic ordering of reduced NdBa§2Cu§3O§6§+§x single crystals. (1996)
Brecht, E., Schmahl, W.W., Fuess, H., Andersen, N.H., Lebech, B., Wolf, T.
RISOE-R-863(EN) S.45
Superstructures in pure and doped YBa§2Cu§3O§6§+§x high-Tc superconductors. (1996)
Zimmermann, M.von, Schneider, J.R., Andersen, N.H., Frello, T., Käll, M., Madsen, J., ...
RISOE-R-863(EN) S.51
Small-angle neutron scattering of the magnetic flux line lattice in NdBa§2Cu§3O§6§+§x. (1996)
Eskildsen, M.R., Andersen, N.H., Mortensen, K., Yaron, U., Gammel, P.L., Bishop, D., ...
RISOE-R-863(EN) S.56
Magnetic ordering in high-purity single crystals of PrBa§2Cu§3Osub (6+x). (1996)
Longmore, A., Boothroyd, A.T., Andersen, N.H., Brecht, E., Wolf, T.
RISOE-R-863(EN) S.57
Brecht, E., Schmahl, W.W., Miehe, G., Rodewald, M., Fuess, H., Andersen, N.H., ...
Physica C, 265(1996) S.53-66
Brecht, E., Schmahl, W.W., Fuess, H., Casalta, H., Schleger, P., Lebech, B., ...
Physical Review B, 52(1996) S.9601-
CCD photometry of the $\delta$-Scuti star $\kappa^{2}$Boo (1995)
Frandsen, S, Jones, A, Kjeldsen, H, Viskum, M, Hjorth, J, Andersen, N H, ...
Brecht, E., Casalta, H., Schleger, P., Andersen, N.H., Schmahl, W.W., Fuess, H., ...
Proc.of the 4th Internat.Conf.on Materials and Mechanisms of Superconductivity and High Temperature Superconductors, Grenoble, F, July 4-9, 1994
Brecht, E., Schmahl, W.W., Miehe, G., Rodewald, M., Gonschorek, W., Fuess, H., ...
3.Jahrestagung der Deutschen Gesellschaft für Kristallographie, Darmstadt, 6.-8.März 1995 (Poster)
Brecht, E., Schmahl, W.W., Fuess, H., Casalta, H., Lebech, B., Andersen, N.H., ...
3.Jahrestagung der Deutschen Gesellschaft für Kristallographie, Darmstadt, 6.-8.März 1995
No antiferromagnetic reordering at low temperature in pure YBa§2Cu§3O§6§+§x. (1995)
Casalta, H., Schleger, P., Brecht, E., Montfrooij, W., Andersen, N.H., Lebech, B., ...
Physica C, 235-240(1994) S.1623-24
Reduction and reoxidation experiments on YBa§2Cu§3§-§xAl§xO§6§+§d§e§l§t§a single crystals. (1995)
Brecht, E., Schmahl, W.W., Miehe, G., Fuess, H., Andersen, N.H., Wolf, T.
Physica C, 235-240(1994) S.471-72
Absence of AF reordering at low temperature in pure YBa§2Cu§3O§6§+§x. (1995)
Casalta, H., Schleger, P., Montfrooij, W., Andersen, N.H., Lebech, B., Brecht, E., ...
Risoe-R-779(EN) (January 95) S.27
Effect of Al doping on the magnetism of YBa§2Cu§3O§6§+§x single crystals. (1995)
Brecht, E., Schmahl, W.W., Fuess, H., Casalta, H., Schleger, P., Lebech, B., ...
Risoe-R-779(EN) (January 95) S.35
Brecht, E., Schmahl, W.W., Fuess, H., Andersen, N.H., Wolf, T.
Risoe-R-779(EN) (January 95) S.43
Brecht, E., Schmahl, W.W., Miehe, G., Fuess, H., Andersen, N.H., Wolf, T.
4th Internat.Conf.on Materials and Mechanisms of Superconductivity and High Temperature Superconductors, Grenoble, F, July 4-9, 1994
Absence of the second magnetic transition [T§N§2] in YBa§2Cu§3O§6§+§x. (1994)
Casalta, H., Schleger, P., Montfrooij, W., Lebech, B., Andersen, N.H., Brecht, E., ...
4th Internat.Conf.on Materials and Mechanisms of Superconductivity and High Temperature Superconductors, Grenoble, F, July 5-9, 1994
Absence of a second antiferromagnetic transition in pure YBa§2Cu§3O§6§+§x. (1994)
Casalta, H., Schleger, P., Brecht, E., Montfrooij, W., Andersen, N.H., Lebech, B., ...
Physical Review B, 50(1994) S.9688
Local oxygen ordering in superconducting YBa§2Cu§3O§6§.§4 observed by neutron diffraction. (1992)
Zeiske, T., Sonntag, R., Hohlwein, D., Andersen, N.H., Wolf, T.
Nature, 353(1991) S.542-44
Lecture notes of basic courses presented at 1 st Topsøe Summer School on Superconductivity (1988)
N. H. Andersen, K. Mortensen, N. H. Andersen, K. Mortensen, L. M. Falicov
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Neutron-Diffraction and Tsdc on Ba1-Xuxf2+2x Solid Electrolytes (1986)
Ouwerkerk, M., Andersen, N.H., Veldkamp, F.F., Schoonman, J.
Tsdc and Neutron-Scattering Measurements on Ba1-Xlaxf2+X and Ba1-Xuxf2+2x Solid-Solutions (1985)
Ouwerkerk, M., Veldkamp, F.F., Andersen, N.H., Schoonman, J.
TSDC and neutron scattering measurements on Ba1-xLaxF2+x and Ba1-xUxF2+2x solid solutions (1985)
Ouwerkerk, M., Veldkamp, F.F., Andersen, N.H., Schoonman, J.
A study was made of the dynamical behaviour of bound interstitial fluoride ions in disordered Ba1−xLaxF2+x and Ba1−xUxF2+2x solid solutions with Thermally Stimulated Depolarisation Current...
Kinetics of MgB2 formation studied bu in-situ synchrotron x-ray diffraction 2006-08-27 - 2006-09-01
A.B. Abrahamsen, N.H. Andersen, J. Homeyer, ...
Conference presentation
Empirical parameterization of a model for predicting peptide helix/coil equilibrium populations.
A modification of the Lifson-Roig formulation of helix/coil transitions is presented; it (1) incorporates end-capping and coulombic (salt bridges, hydrogen bonding, and side-chain interactions with...
Poulsen, S H, Andersen, N H, Heickendorff, L, Mogensen, C E
Objective: To investigate whether myocardial fibrosis assessed non-invasively is related to left ventricular (LV) longitudinal systolic function in patients with essential hypertension.