Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Daniel Esmarch Madsen"'
Publikováno v:
Croatica Chemica Acta, Vol 88, Iss 4, Pp 481-485 (2015)
By use of Mössbauer spectroscopy we have studied the magnetic properties of samples of goethite nanoparticles with different particle size. The spectra are influenced by fluctuations of the magnetization directions, but the size dependence is not in
Externí odkaz:
https://doaj.org/article/d3b25a9d6c874c18b0346db047208ca8
Autor:
David Tanner, Rico Petersen, Erhad Ascic, Thomas E. Nielsen, Mette Reimert Hansen, Ragnhild Gaard Ohm, Casper Lykke Hansen, Daniel Esmarch Madsen
Publikováno v:
Chemistry - A European Journal. 20:3297-3300
A ruthenium hydride/Brønsted acid-catalyzed tandem sequence is reported for the synthesis of 1,3,4,9-tetrahydropyrano[3,4-b]indoles (THPIs) and related oxacyclic scaffolds. The process was designed on the premise that readily available allylic ether
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ce469cd1d4a73ff2708088b4bb91a874
https://doi.org/10.1002/chem.201304270
https://doi.org/10.1002/chem.201304270
Autor:
Steen Mørup, Per-Anker Lindgård, Christian R.H. Bahl, Kim Lefmann, Daniel Esmarch Madsen, J. Garde, Thomas Bagger Stibius Jensen
Publikováno v:
The European Physical Journal B. 62:53-57
In magnetic nanoparticles the uniform precession (q = 0 spin wave) mode gives the predominant contribution to the magnetic excitations. We have calculated the energy of the uniform mode in antiferromagnetic nanoparticles with uncompensated magnetic m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::89f7dea35950fa6a598a0712040db1d2
https://doi.org/10.1140/epjb/e2008-00122-1
https://doi.org/10.1140/epjb/e2008-00122-1
Publikováno v:
Journal of Magnetism and Magnetic Materials. 305:95-99
We have investigated the influence of anisotropy on the magnetization curves of antiferromagnetic nanoparticles. We show that if such curves are analyzed in a conventional way, i.e. using a Langevin function in combination with a linear term, this us
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2db06a5ad73af272b0466383ed486cca
https://doi.org/10.1016/j.jmmm.2005.11.033
https://doi.org/10.1016/j.jmmm.2005.11.033
Autor:
Thomas E. Nielsen, Mette Reimert Hansen, David Tanner, Ragnhild Gaard Ohm, Rico Petersen, Daniel Esmarch Madsen, Erhad Ascic, Casper Lykke Hansen
Publikováno v:
ChemInform. 45
A variety of tetrahydropyranoindoles and related scaffolds are synthesized from allylic ethers via an isomerization/oxocarbenium cyclization sequence.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4864c028a4e166a6238ac57579d483a9
https://doi.org/10.1002/chin.201436149
https://doi.org/10.1002/chin.201436149
Autor:
Steen Mørup, Takeshi Kasama, Daniel Esmarch Madsen, L Cervera-Gontard, Rafal E. Dunin-Borkowski, Christian Koch, Mikkel Fougt Hansen, Cathrine Frandsen
Publikováno v:
Journal of physics. Condensed matter : an Institute of Physics journal. 21(1)
Mossbauer spectra of antiferromagnetic goethite (α-FeOOH) particles usually show an asymmetric line broadening, which increases with increasing temperature, although the magnetic anisotropy is expected to be so large that magnetic relaxation effects
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a2b542b0501158d3224bf5da138e27ad
https://pubmed.ncbi.nlm.nih.gov/21817244
https://pubmed.ncbi.nlm.nih.gov/21817244
Autor:
Jeffrey R. Johnson, R. V. Morris, Göstar Klingelhöfer, Jari í Hjøllum, H. M. Arneson, Ralf Gellert, K. Leer, J. K. Jensen, Kenneth E. Herkenhoff, M. Sims, Finn Folkmann, Thomas J. Wdowiak, Walter Goetz, Stubbe F. Hviid, Daniel Rodionov, Morten Madsen, Jonathan Merrison, C. S. Binau, E. McCartney, Kjartan M. Kinch, P. Bertelsen, S. W. Squyres, J. Proton, Miles J. Johnson, Albert S. Yen, M. Olsen, Haraldur P. Gunnlaugsson, James F. Bell, D. W. Ming, Daniel Esmarch Madsen
Publikováno v:
Madsen, M B, Goetz, W, Bertelsen, P, Binau, C S, Folkmann, F, Gunnlaugsson, H P, Hjøllum, J Í, Hviid, S F, Jensen, J, Kinch, K M, Leer, K, Madsen, D E, Merrison, J P, Olsen, M, Arneson, H M, Bell III, J F, Gellert, R, Herkenhoff, K E, Johnson, J R, Johnson, M J, Klingenhöfer, G, McCartney, E, Ming, D W, Morris, R V, Proton, J B, Rodionov, D, Sims, M, Squyres, W, Wdowiak, T & Yen, A S 2009, ' Overview of the magnetic properties experiments on the Mars Explorations Rovers ', Journal of Geophysical Research, vol. 114 . https://doi.org/10.1029/2008JE003098
[1] The Mars Exploration Rovers have accumulated airborne dust on different types of permanent magnets. Images of these magnets document the dynamics of dust capture and removal over time. The strongly magnetic subset of airborne dust appears dark br
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fb573f13bb6659cee475a97358d7958c
https://pure.au.dk/portal/da/publications/overview-of-the-magnetic-properties-experiments-on-the-mars-explorations-rovers(81bd9e30-f8aa-11de-9c17-000ea68e967b).html
https://pure.au.dk/portal/da/publications/overview-of-the-magnetic-properties-experiments-on-the-mars-explorations-rovers(81bd9e30-f8aa-11de-9c17-000ea68e967b).html
Autor:
Cathrine Frandsen, Christian R.H. Bahl, Daniel Esmarch Madsen, Steen Mørup, Mikkel Fougt Hansen
Publikováno v:
ChemInform. 38
The magnetic properties of nanoparticles of antiferromagnetic materials are reviewed. The magnetic structure is often similar to the bulk structure, but there are several examples of size-dependent magnetic structures. Owing to the small magnetic mom
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cca1e94a96c9745bd02e04bd03e3d064
https://doi.org/10.1002/chin.200749241
https://doi.org/10.1002/chin.200749241
Autor:
Cathrine Frandsen, Per-Anker Lindgård, S. Nyborg Ancona, Steen Mørup, Christian R.H. Bahl, Daniel Esmarch Madsen, Kim Lefmann, L. Theil Kuhn
Publikováno v:
Physical Review B. 74
By use of inelastic neutron scattering we have studied magnetic fluctuations in 8-nm particles of antiferromagnetic {alpha}-Fe{sub 2}O{sub 3} (hematite) as a function of temperature and applied magnetic fields. The fluctuations are dominated by unifo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1cc331952e3f26ee5488eab2e3c65a6f
https://doi.org/10.1103/physrevb.74.184406
https://doi.org/10.1103/physrevb.74.184406
Autor:
Steen Mørup, Daniel Esmarch Madsen
Publikováno v:
Madsen, D E & Mørup, S 2006, ' Thermoinduced magnetization and uncompensated spins in antiferromagnetic nanoparticles ', Physical Review B Condensed Matter, vol. 75, no. 1, pp. 014405 . https://doi.org/10.1103/PhysRevB.74.014405
We have investigated the combined effect of an uncompensated moment and the thermoinduced magnetization on the initial susceptibility of nanoparticles of antiferromagnetic materials. We find that for nanoparticles with small values of the anisotropy
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5d00ee4dd9e75cfa314defaff9f52a25
https://doi.org/10.1103/physrevb.74.014405
https://doi.org/10.1103/physrevb.74.014405