Thermal nanoconversion of ferromagnetic nanoislands

被引：3

作者：

Barker, O. J. ^{[1
]}

Mohammadi-Motlagh, A. ^{[1
]}

Wright, A. J. ^{[1
]}

Batty, R. ^{[1
]}

Finch, H. ^{[2
]}

Vezzoli, A. ^{[3
]}

Keatley, P. S. ^{[4
]}

O'Brien, L. ^{[1
]}

机构：

[1] Univ Liverpool, Dept Phys, Liverpool, England

[2] Univ Liverpool, Dept Elect Engn & Elect, Liverpool, England

[3] Univ Liverpool, Dept Chem, Liverpool, England

[4] Univ Exeter, Dept Phys & Astron, Exeter, England

来源：

APPLIED PHYSICS LETTERS | 2024年 / 124卷 / 11期

基金：

英国工程与自然科学研究理事会;

关键词：

THIN-FILMS; MAGNETIC-ANISOTROPY; LITHOGRAPHY;

D O I：

10.1063/5.0189759

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In this work, we investigate the use of post-fabrication thermal nanoconversion (TNC), using a heated scanning probe tip, to modify the magnetic properties of Ni80Fe20 elliptical nanoislands with varying aspect ratio. Despite Ni80Fe20 being unoptimized for TNC, by comparing quasistatic and dynamic magneto-optical Kerr effect microscopy measurements, we demonstrate that TNC at a contact temperature of 250 C-degrees increases the saturation magnetization of the treated nanoislands, reaching a value close to 800 kA/m. Micromagnetic simulations of the nanoislands indicate that the TNC technique can be used to alter the remanent state, from a single domain to a vortex. These results demonstrate the opportunities afforded by TNC to modify the properties of selected areas in a thin film or a patterned sample, particularly when designing magnonic crystals and other nanomagnetic devices.

引用

页数：6

共 35 条

[1] Thermochemical scanning probe lithography of protein gradients at the nanoscale [J].