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Tytuł pozycji:

Dependence of the Magnetization Process on the Thickness of Fe 70 Pd 30 Nanostructured Thin Film.

Tytuł :
Dependence of the Magnetization Process on the Thickness of Fe 70 Pd 30 Nanostructured Thin Film.
Autorzy :
Salaheldeen, Mohamed
Abu-Dief, Ahmed Mohamed
Martínez-Goyeneche, Lucía
Alzahrani, Seraj Omar
Alkhatib, Fatmah
Álvarez-Alonso, Pablo
Blanco, Jesús Ángel
Pokaż więcej
Temat :
MAGNETIC alloys
MAGNETIZATION
THIN films
CRITICAL temperature
MAGNETIC sensors
MAGNETIZATION reversal
ANODIC oxidation of metals
CURIE temperature
Źródło :
Materials (1996-1944); Dec2020, Vol. 13 Issue 24, p5788, 1p
Czasopismo naukowe
Fe–Pd magnetic shape-memory alloys are of major importance for microsystem applications due to their magnetically driven large reversible strains under moderate stresses. In this context, we focus on the synthesis of nanostructured Fe70Pd30 shape-memory alloy antidot array thin films with different layer thicknesses in the range from 20 nm to 80 nm, deposited onto nanostructured alumina membranes. A significant change in the magnetization process of nanostructured samples was detected by varying the layer thickness. The in-plane coercivity for the antidot array samples increased with decreasing layer thickness, whereas for non-patterned films the coercive field decreased. Anomalous coercivity dependence with temperature was detected for thinner antidot array samples, observing a critical temperature at which the in-plane coercivity behavior changed. A significant reduction in the Curie temperature for antidot samples with thinner layer thicknesses was observed. We attribute these effects to complex magnetization reversal processes and the three-dimensional magnetization profile induced by the nanoholes. These findings could be of major interest in the development of novel magnetic sensors and thermo-magnetic recording patterned media based on template-assisted deposition techniques. [ABSTRACT FROM AUTHOR]
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