Dependence of the Magnetization Process on the Thickness of Fe70Pd30 Nanostructured Thin Film

Salaheldeen, Mohamed; Abu-Dief, Ahmed Mohamed; Martínez-Goyeneche, Lucía; Alzahrani, Seraj Omar; Alkhatib, Fatmah; Álvarez-Alonso, Pablo; Blanco, Jesús Ángel

doi:10.3390/ma13245788

Open AccessArticle

Dependence of the Magnetization Process on the Thickness of Fe₇₀Pd₃₀ Nanostructured Thin Film

by

Mohamed Salaheldeen

^1,2,*

,

Ahmed Mohamed Abu-Dief

^3,4

,

Lucía Martínez-Goyeneche

²,

Seraj Omar Alzahrani

³,

Fatmah Alkhatib

⁵,

Pablo Álvarez-Alonso

^2,*

and

Jesús Ángel Blanco

²

¹

Physics Department, Faculty of Science, Sohag University, Sohag 82524, Egypt

²

Departamento de Física, Universidad de Oviedo, C/Calvo Sotelo 18, 33007 Oviedo, Spain

³

Chemistry Department, College of Science, Taibah University, Madinah P.O. Box 344, Saudi Arabia

⁴

Chemistry Department, Faculty of Science, Sohag University, Sohag 82534, Egypt

⁵

Chemistry Department, Faculty of Applied Science, Umm Al-Qura University, Makkah P.O. Box 715, Saudi Arabia

^*

Authors to whom correspondence should be addressed.

Materials 2020, 13(24), 5788; https://doi.org/10.3390/ma13245788

Submission received: 21 October 2020 / Revised: 7 December 2020 / Accepted: 15 December 2020 / Published: 18 December 2020

(This article belongs to the Special Issue New Aspects of Ferromagnetic Shape Memory Alloys: From Fabrication to Applications)

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Abstract

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.

Keywords: nanoporous alumina templates; antidot arrays; Kerr effect; Curie temperature; Fe₇₀Pd₃₀ shape-memory alloy

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MDPI and ACS Style

Salaheldeen, M.; Abu-Dief, A.M.; Martínez-Goyeneche, L.; Alzahrani, S.O.; Alkhatib, F.; Álvarez-Alonso, P.; Blanco, J.Á. Dependence of the Magnetization Process on the Thickness of Fe₇₀Pd₃₀ Nanostructured Thin Film. Materials 2020, 13, 5788. https://doi.org/10.3390/ma13245788

AMA Style

Salaheldeen M, Abu-Dief AM, Martínez-Goyeneche L, Alzahrani SO, Alkhatib F, Álvarez-Alonso P, Blanco JÁ. Dependence of the Magnetization Process on the Thickness of Fe₇₀Pd₃₀ Nanostructured Thin Film. Materials. 2020; 13(24):5788. https://doi.org/10.3390/ma13245788

Chicago/Turabian Style

Salaheldeen, Mohamed, Ahmed Mohamed Abu-Dief, Lucía Martínez-Goyeneche, Seraj Omar Alzahrani, Fatmah Alkhatib, Pablo Álvarez-Alonso, and Jesús Ángel Blanco. 2020. "Dependence of the Magnetization Process on the Thickness of Fe₇₀Pd₃₀ Nanostructured Thin Film" Materials 13, no. 24: 5788. https://doi.org/10.3390/ma13245788

APA Style

Salaheldeen, M., Abu-Dief, A. M., Martínez-Goyeneche, L., Alzahrani, S. O., Alkhatib, F., Álvarez-Alonso, P., & Blanco, J. Á. (2020). Dependence of the Magnetization Process on the Thickness of Fe₇₀Pd₃₀ Nanostructured Thin Film. Materials, 13(24), 5788. https://doi.org/10.3390/ma13245788

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Dependence of the Magnetization Process on the Thickness of Fe₇₀Pd₃₀ Nanostructured Thin Film

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