Zobrazeno 1 - 10
of 2 269
pro vyhledávání: '"Schrefl T"'
Autor:
Sandoval, Miguel A. Cascales, Jurczyk, J., Skoric, L., Sanz-Hernández, D., Leo, N., Kovacs, A., Schrefl, T., Hierro-Rodríguez, A., Fernández-Pacheco, A.
In-operando techniques enable real-time measurement of intricate physical properties at the micro- and nano-scale under external stimuli, allowing the study of a wide range of materials and functionalities. In nanomagnetism, in-operando techniques gr
Externí odkaz:
http://arxiv.org/abs/2411.10374
Autor:
Kovacs, A., Fischbacher, J., Gusenbauer, M., Oezelt, H., Herper, H. C., Vekilova, O. Yu., Nieves, P., Arapan, S., Schrefl, T.
Multiscale simulation is a key research tool for the quest for new permanent magnets. Starting with first principles methods, a sequence of simulation methods can be applied to calculate the maximum possible coercive field and expected energy density
Externí odkaz:
http://arxiv.org/abs/1903.11995
Autor:
Arapan, S., Nieves, P., Cuesta-López, S., Gusenbauer, M., Oezelt, H., Schrefl, T., Delczeg-Czirjak, E. K., Herper, H. C., Eriksson, O.
Publikováno v:
Phys. Rev. Materials 3, 064412 (2019)
In this work we use a multiscale approach toward a realistic design of a permanent magnet based on MnAl $\tau$-phase and elucidate how the antiphase boundary defects present in this material affect the energy product. We show how the extrinsic proper
Externí odkaz:
http://arxiv.org/abs/1903.06518
Autor:
Nieves, P., Arapan, S., Maudes, J., Marticorena, R., Del Brío, N. L., Kovacs, A., Echevarria-Bonet, C., Salazar, D., Weischenberg, J., Zhang, H., Vekilova, O. Yu., Serrano-López, R., Barandiaran, J. M., Skokov, K., Gutfleisch, O., Eriksson, O., Herper, H. C., Schrefl, T., Cuesta-López, S.
Publikováno v:
Comp.Mater.Sci. 168 (2019) 188-202
This paper describes the open Novamag database that has been developed for the design of novel Rare-Earth free/lean permanent magnets. The database software technologies, its friendly graphical user interface, advanced search tools and available data
Externí odkaz:
http://arxiv.org/abs/1902.05241
Autor:
Fischbacher, J., Kovacs, A., Kühnel, L. Exl J., Mehofer, E., Sepehri-Amin, H., Ohkubo, T., Hono, K., Schrefl, T.
Magnetization reversal in permanent magnets occurs by the nucleation and expansion of reversed domains. Micromagnetic theory offers the possibility to localize the spots within the complex structure of the magnet where magnetization reversal starts.
Externí odkaz:
http://arxiv.org/abs/1805.09798
Publikováno v:
Appl. Phys. Lett. 111, 192407 (2017)
Permanent magnet materials require a high uniaxial magneto-crystalline anisotropy. Exchange coupling between small crystallites with easy-plane anisotropy induces an effective uniaxial anisotropy if arranged accordingly. Nanostructuring of materials
Externí odkaz:
http://arxiv.org/abs/1711.03144
Autor:
Fischbacher, J., Kovacs, A., Oezelt, H., Gusenbauer, M., Schrefl, T., Exl, L., Givord, D., Dempsey, N. M., Zimanyi, G., Winklhofer, M., Hrkac, G., Chantrell, R., Sakuma, N., Yano, M., Kato, A., Shoji, T., Manabe, A.
Publikováno v:
Appl. Phys. Lett. 111, 072404 (2017)
The maximum coercivity that can be achieved for a given hard magnetic alloy is estimated by computing the energy barrier for the nucleation of a reversed domain in an idealized microstructure without any structural defects and without any soft magnet
Externí odkaz:
http://arxiv.org/abs/1708.01880
Autor:
Fischbacher, J., Kovacs, A., Oezelt, H., Schrefl, T., Exl, L., Fidler, J., Suess, D., Sakuma, N., Yano, M., Kato, A., Shoji, T., Manabe, A.
Conjugate gradient methods for energy minimization in micromagnetics are compared. When the step length in the line search is controlled, conjugate gradient techniques are a fast and reliable way to compute the hysteresis properties of permanent magn
Externí odkaz:
http://arxiv.org/abs/1701.05810
In this work we present a micromagnetic study of the performance potential of bit-patterned (BP) magnetic recording media via joint optimization of the design of the media and of the magnetic write heads. Because the design space is large and complex
Externí odkaz:
http://arxiv.org/abs/1603.09493
Autor:
Kovacs, A., Oezelt, H., Bance, S., Fischbacher, J., Gusenbauer, M., Reichel, F., Exl, L., Schrefl, T., Schabes, M. E.
Publikováno v:
J. Appl. Phys. 115, 17B704 (2014)
A fully-automated pole-tip shape optimization tool, involving write head geometry construction, meshing, micromagnetic simulation and evaluation, is presented. Optimizations have been performed for three different writing schemes (centered, staggered
Externí odkaz:
http://arxiv.org/abs/1504.03577