Micromagnetic Simulation of Magnetic Nanowires (MNW) using OOMMF to Predict Heating Ability
2023.01.11 Yicong Chen, University of Minnesota
The simulation tool OOMMF can be found on nanoHUB at: https://nanohub.org/tools/oommf
Magnetic nanowires (MNWs) are potential candidates for heating in biomedical applications such as nanowarming of cryopreserved organs and hyperthermia treatment of cancer cells that require rapid heating rates. Therefore, it is essential to optimize their heating ability by controlling their properties. Using the OOMMF simulation tool in nanoHUB, we will learn how to specify properties of the MNWs, such as their geometry and material and how these properties will affect their magnetic reversal behavior. For instance, we will use the graph function in OOMMF to observe the changes of hysteresis loops on varying properties of MNWs and use the display function to explain these changes of hysteresis loops by tracking the types of different magnetic moment motion at the reversal. As a result of changing hysteresis behavior, the heating ability can be calculated for comparison to determine the best choice of MNWs for the heating process.
Table of Contents:
00:00 OOMMF Webinar
01:05 Overview
01:35 Motivation
02:35 Magnetic Nanowires can be Very Small
03:25 Magnetic Nanowires can be Very Hot
04:14 How? Magnetic Reversal Mechanisms
05:28 Theoretical limit of heating ability
07:58 User guide for OOMMF
09:18 OOMMF on nanoHUB
10:13 OOMMF on nanoHUB
11:07 OOMMF on nanoHUB
11:22 OOMMF on nanoHUB
11:48 OOMMF on nanoHUB
12:18 Mif file
13:21 OOMMF parameters
14:58 Mif file: geometry info 50x3000 cylinder
15:47 Mif file: material info Fe
19:17 Mif file: external field
20:08 Output/data process
21:48 Output/data process
22:56 Output/data process
25:06 Output/data process: heating ability
25:40 Sample calculation: heating ability of MNW
30:01 OOMMF Demo
39:07 MIF Generator for OOMMF Demo
This resource and related downloads can be found at: https://nanohub.org/resources/36773
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