Zobrazeno 1 - 10
of 113
pro vyhledávání: '"Per-Anker Lindgård"'
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
Autor:
Per-Anker Lindgård
Publikováno v:
Journal of Magnetism and Magnetic Materials. 266:88-95
The structural behavior of ideal, bulk FCC antiferromagnets in a field is known to be very complex (Phys. Rev. Lett. 53 (1984) 1692; Phys. Rev. Lett. 61 (1988) 629, Phys. Rev. Lett. 64 (1990) 1421). Kodoma and Berkowitz (Phys. Rev. B 59 (1999) 6321)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::707ec1e8a555dbda32eaef0efafeecd8
https://doi.org/10.1016/s0304-8853(03)00459-1
https://doi.org/10.1016/s0304-8853(03)00459-1
Autor:
Per-Anker Lindgård
Publikováno v:
Journal of Physics: Condensed Matter. 15:S1779-S1786
A brief overview is given of the nature and importance of proteins. Current equilibrium theories concerning the folding process are discussed and an alternative non-equilibrium model proposed. This so-called hydrophobic hinge model can predict protei
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::99ef977e47816e0919ca8378f2afa5f5
https://doi.org/10.1088/0953-8984/15/18/311
https://doi.org/10.1088/0953-8984/15/18/311
Publikováno v:
Journal of Physics: Condensed Matter. 15:V5-V9
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6e5a1ec85cac78b30ce10974f902b381
https://doi.org/10.1088/0953-8984/15/18/401
https://doi.org/10.1088/0953-8984/15/18/401
Publikováno v:
physica status solidi (a). 189:1039-1042
We present neutron diffraction data of NiO nanoparticles measuring the total magnetization and the sublattice magnetization at various temperatures. Electron microscopy shows that the particles are disc shaped with average diameter of about 12 nm and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e7dac0ea30745936ecf13cd7a9316c82
https://doi.org/10.1002/1521-396x(200202)189:3<1039::aid-pssa1039>3.0.co
https://doi.org/10.1002/1521-396x(200202)189:3<1039::aid-pssa1039>3.0.co
Autor:
Steen Mørup, Kim Lefmann, Per-Anker Lindgård, Cathrine Frandsen, Mikkel Fougt Hansen, S.N. Klausen, F. Bødker
Publikováno v:
Hyperfine Interactions. :347-357
The magnetic properties of antiferromagnetic nanoparticles have been studied by Mossbauer spectroscopy and neutron scattering. Temperature series of Mossbauer spectra of non-interacting, superparamagnetic hematite nanoparticles were fitted by use of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7d7a1bbe89fc44c9cc61a87e725d58a5
https://doi.org/10.1023/a:1025430411360
https://doi.org/10.1023/a:1025430411360
Publikováno v:
Le Journal de Physique IV. 11:Pr8-299
We have extended the degenerate BEG model[1] to include magnetic degrees of freedom in order to study the premartensitic effects in Ni 2 MnGa. The model is solved by using mean-field theory and Monte Carlo techniques [2]. The numerical simulations re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a87799b26fe3dcf5e59e0cc124c6fdf4
https://doi.org/10.1051/jp4:2001851
https://doi.org/10.1051/jp4:2001851
Autor:
Steen Mørup, Kurt Nørgaard Clausen, S.N. Klausen, Per-Anker Lindgård, Mikkel Fougt Hansen, F. Bødker, K. Lefmann
Publikováno v:
Europhysics Letters (EPL). 54:526-532
We present inelastic neutron scattering studies of 4 nm maghemite nanoparticles. In applied magnetic fields (1-4 T) at 300 K, we observe a clear signal from collective magnetic excitations (spin precession of the whole particle moment). The precessio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::10d67e6f5fc7ebe8ab747b2c652a10fe
https://doi.org/10.1209/epl/i2001-00279-7
https://doi.org/10.1209/epl/i2001-00279-7
Autor:
Per-Anker Lindgård, Mikkel Fougt Hansen, F. Bødker, Kim Lefmann, Kurt Nørgaard Clausen, Steen Mørup
Publikováno v:
Journal of Magnetism and Magnetic Materials. 221:10-25
We give an introduction to inelastic neutron scattering and the dynamic scattering function for magnetic nanoparticles. Differences between ferromagnetic and antiferromagnetic nanoparticles are discussed and we give a review of recent results on ferr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3618b95798a032731ccfda0214f135f6
https://doi.org/10.1016/s0304-8853(00)00372-3
https://doi.org/10.1016/s0304-8853(00)00372-3
Autor:
Per-Anker Lindgård, Jeff Baker
Publikováno v:
Physical Review B. 60:16941-16949
We have performed Monte Carlo simulations of the properties of a NaCl (001) surface covered by full or partial layers of KCl, for coverages up to 5 monolayers (ML). A wide variety of structures of the film is found. For integer ML coverages we find t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::40b2f1e3c7c84670c98d457fd08651d7
https://doi.org/10.1103/physrevb.60.16941
https://doi.org/10.1103/physrevb.60.16941