Role of the interfaces in the crystallization and hysteresis mechanisms of amorphous Fe-B thin films
Role of the interfaces in the crystallization and hysteresis mechanisms of amorphous Fe-B thin films
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界面在非晶 Fe-B 薄膜结晶和滞后机制中的作用
DOI:
10.1016/j.jallcom.2021.159276
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发表时间:
2021
影响因子:
6.2
通讯作者:
F Cebollada
中科院分区:
文献类型:
--
作者:
Unai Urdiroz;F Javier Palomares;A Mayoral;IV Soldatov;R Schäfer;JM Gonzalez;Marta Sanchez-Agudo;E Navarro;A Ruiz;María Alonso;Luis Vázquez;F Cebollada
In this work we study the crystallization processes of two sets of amorphous Fe80B20films fabricated by Pulsed Laser Ablation Deposition on substrates with different nature, Corning glass® and MgO(001). We analyze their magnetic hysteresis mechanisms by means of magneto-optic techniques and Transmission Electron Microscopy. The as-deposited amorphous films present a highly homogeneous uniaxial magnetic anisotropy with the easy axis orientation dependent on the type of substrate and much weaker than that of bulk alloys with similar composition. The onset of crystallization for the films deposited on glass and MgO appears, respectively, at temperatures 150 °C and 250 °C below that of their bulk counterparts. We study the role of the substrate in the crystallization mechanism and the resulting nanostructure of the magnetic films. While the crystallization of the MgO-deposited films proceeds in a broad front growing from the substrate to the surface, that of the glass-deposited films takes place through the nucleation and growth of isolated crystallites. We analyze the evolution of the coercivity during the crystallization of the films. It follows a similar trend for both types, remaining in values close to those of the amorphous precursors until it rises steeply at a given annealing temperature. The threshold of the steep coercivity increase of the glass-deposited films is shifted to lower temperatures with respect to the MgO ones, in spite of the higher crystallization onset temperature of the former. The coercivity mechanisms have been analyzed, correlated to the films interfacial characteristics and compared to those of bulk alloys.
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DOI:
--
发表时间:
1997
期刊:
影响因子:
--
作者:
P. Vavassori;F. Ronconi;E. Puppin
通讯作者:
E. Puppin
DOI:
--
发表时间:
1997
期刊:
影响因子:
--
作者:
F. Cebollada;J. González;C. Julián;S. Suriñach
通讯作者:
S. Suriñach
DOI:
--
发表时间:
1978
期刊:
影响因子:
--
作者:
G. Schroeder;R. Schäfer;H. Kronmüller
通讯作者:
H. Kronmüller
DOI:
--
发表时间:
1996
期刊:
影响因子:
--
作者:
P. Vavassori;F. Ronconi;E. Puppin
通讯作者:
E. Puppin
DOI:
--
发表时间:
1993
期刊:
影响因子:
--
作者:
V. Martín;J. Bernardi;J. Fidler;F. Cebollada;J. González
通讯作者:
J. González