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4 papers · 1 filter
Magnetic nanoparticles as many-spin systems
H. Kachkachi, D. A. Garanin
We present a review of recent advances in the study of many-body effects in magnetic nanoparticles. Considering classical spins on a lattice coupled by the exchange interaction in…
On the optical extinction and distance of GRS 1915+105
C. Chapuis, S. Corbel
Based on new millimeter and radio observations, we reevaluate the total hydrogen column density along the line of sight to the microquasar GRS 1915+105 to NH=(3.5 +/- 0.3) 10^22 cm…
Partitions and Compositions defined by inequalities
S. Corteel, C. D. Savage
We consider sequences of integers defined by a system of linear inequalities with integer coefficients. We show that when the constraints are strong enough to guarantee that all th…
Surface anisotropy in nanomagnets: transverse or Néel ?
H. Kachkachi, H. Mahboub
Through the hysteresis loop and magnetization spatial distribution we study and compare two models for surface anisotropy in nanomagnets: a model with transverse anisotropy axes an…