Modelling of MFM images of 180º and 90º domain walls in iron films

S Huo; JEL Bishop; JW Tucker; WM Rainforth; HA Davies

doi:10.1109/20.619661

Modelling of MFM images of 180º and 90º domain walls in iron films

S Huo, JEL Bishop, JW Tucker, WM Rainforth, HA Davies

The University of Bristol

Research output: Contribution to journal › Article (Academic Journal) › peer-review

5 Citations (Scopus)

Abstract

We report symmetric and antisymmetric 180/spl deg/ and 90/spl deg/ domain wall structures in (100) iron films obtained by micromagnetic computer simulation and the force gradients experienced by a pyramidal tip coated with thin CoCr film scanning them at 50 nm altitude. The magnetic force gradient was obtained numerically as the second difference of the interaction energy of the magnetic tip and the sample for small vertical displacements. The results showed that by using a magnetic force microscope (MFM), it is very difficult to distinguish (i) S and C type 180/spl deg/ domain walls in a thick iron film; and (ii) symmetric and asymmetric 90/spl deg/ Neel domain walls. However, S and C 180/spl deg/ domain walls can more readily be distinguished in thin magnetic films.

Translated title of the contribution	Modelling of MFM images of 180° and 90° domain walls in iron films
Original language	English
Pages (from-to)	4056-4058
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	33
DOIs	https://doi.org/10.1109/20.619661
Publication status	Published - 1997

Bibliographical note

Publisher: IEEE

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title = "Modelling of MFM images of 180º and 90º domain walls in iron films",

abstract = "We report symmetric and antisymmetric 180/spl deg/ and 90/spl deg/ domain wall structures in (100) iron films obtained by micromagnetic computer simulation and the force gradients experienced by a pyramidal tip coated with thin CoCr film scanning them at 50 nm altitude. The magnetic force gradient was obtained numerically as the second difference of the interaction energy of the magnetic tip and the sample for small vertical displacements. The results showed that by using a magnetic force microscope (MFM), it is very difficult to distinguish (i) S and C type 180/spl deg/ domain walls in a thick iron film; and (ii) symmetric and asymmetric 90/spl deg/ Neel domain walls. However, S and C 180/spl deg/ domain walls can more readily be distinguished in thin magnetic films.",

author = "S Huo and JEL Bishop and JW Tucker and WM Rainforth and HA Davies",

note = "Publisher: IEEE",

year = "1997",

doi = "10.1109/20.619661",

language = "English",

volume = "33",

pages = "4056--4058",

journal = "IEEE Transactions on Magnetics",

issn = "0018-9464",

publisher = "Institute of Electrical and Electronics Engineers (IEEE)",

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TY - JOUR

T1 - Modelling of MFM images of 180º and 90º domain walls in iron films

AU - Huo, S

AU - Bishop, JEL

AU - Tucker, JW

AU - Rainforth, WM

AU - Davies, HA

N1 - Publisher: IEEE

PY - 1997

Y1 - 1997

N2 - We report symmetric and antisymmetric 180/spl deg/ and 90/spl deg/ domain wall structures in (100) iron films obtained by micromagnetic computer simulation and the force gradients experienced by a pyramidal tip coated with thin CoCr film scanning them at 50 nm altitude. The magnetic force gradient was obtained numerically as the second difference of the interaction energy of the magnetic tip and the sample for small vertical displacements. The results showed that by using a magnetic force microscope (MFM), it is very difficult to distinguish (i) S and C type 180/spl deg/ domain walls in a thick iron film; and (ii) symmetric and asymmetric 90/spl deg/ Neel domain walls. However, S and C 180/spl deg/ domain walls can more readily be distinguished in thin magnetic films.

AB - We report symmetric and antisymmetric 180/spl deg/ and 90/spl deg/ domain wall structures in (100) iron films obtained by micromagnetic computer simulation and the force gradients experienced by a pyramidal tip coated with thin CoCr film scanning them at 50 nm altitude. The magnetic force gradient was obtained numerically as the second difference of the interaction energy of the magnetic tip and the sample for small vertical displacements. The results showed that by using a magnetic force microscope (MFM), it is very difficult to distinguish (i) S and C type 180/spl deg/ domain walls in a thick iron film; and (ii) symmetric and asymmetric 90/spl deg/ Neel domain walls. However, S and C 180/spl deg/ domain walls can more readily be distinguished in thin magnetic films.

U2 - 10.1109/20.619661

DO - 10.1109/20.619661

M3 - Article (Academic Journal)

VL - 33

SP - 4056

EP - 4058

JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

SN - 0018-9464

ER -