Imaging, Manipulation, and Spectroscopic Measurements of Nanomagnets by Magnetic Force Microscopy

MRS Bulletin ◽  
2004 ◽  
Vol 29 (7) ◽  
pp. 457-462 ◽  
Author(s):  
Xiaobin Zhu ◽  
Peter Grütter

AbstractMagnetic force microscopy (MFM) is a well-established technique for imaging the magnetic structures of small magnetic particles. In cooperation with external magnetic fields, MFM can be used to study the magnetization switching mechanism of submicrometer-sized magnetic particles. Various MFM techniques allow the measurement of a hysteresis curve of an individual particle, which can then be compared to ensemble measurements. The advantage of using MFM-constructed hysteresis loops is that one can in principle understand the origin of dispersion in switching fields. It is also possible to directly observe the correlation between magnetic particles through careful imaging and control of the external magnetic field. In all of these measurements, attention needs to be paid to avoid artifacts that result from the unavoidable magnetic tip stray field. Control can be achieved by optimizing the MFM operation mode as well as the tip parameters. It is even possible to use the tip stray field to locally and reproducibly manipulate the magnetic-moment state of small particles. In this article, we illustrate these concepts and issues by studying various lithographically patterned magnetic nanoparticles, thus demonstrating the versatility of MFM for imaging, manipulation, and spectroscopic measurements of small particles.

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Marco Coïsson ◽  
Gabriele Barrera ◽  
Federica Celegato ◽  
Alessandra Manzin ◽  
Franco Vinai ◽  
...  

2000 ◽  
Vol 15 (3) ◽  
pp. 751-755 ◽  
Author(s):  
J. P. Sinnecker ◽  
J. M. García ◽  
A. Asenjo ◽  
M. Vázquez ◽  
A. García-Arribas

Co90P10 amorphous microtubes with thickness ranging from 2 to 19 μm were electrodeposited onto Cu wire substrates. Samples exhibit radial magnetic anisotropy as deduced from hysteresis loops and magnetic force microscopy imaging. These microtubes show quite noticeable giant magnetoimpedance effect (GMI) with amplitude depending on layer thickness and frequency. The hysteresis in the GMI curves is small, which can be ascribed to the radial anisotropy. Such small hysteresis is of importance for technological applications.


2003 ◽  
Vol 93 (10) ◽  
pp. 8540-8542 ◽  
Author(s):  
Xiaobin Zhu ◽  
P. Grütter ◽  
V. Metlushko ◽  
Y. Hao ◽  
F. J. Castaño ◽  
...  

2009 ◽  
Vol 2009 ◽  
pp. 1-4 ◽  
Author(s):  
Kei Tanaka ◽  
Masamichi Yoshimura ◽  
Kazuyuki Ueda

Carbon nanotubes (CNTs) have been successfully grown on the tip apex of an atomic force microscopy (AFM) cantilever by microwave plasma-enhanced chemical vapor deposition (MPECVD). Both scanning electron microscopy (SEM) and transmission electron microscopy (TEM) observations reveal that the diameter of the CNTs is∼30 nm and the magnetic particles with diameter of∼20 nm, which was used as catalyst for the CNT growth, exist on the top. This CNT probe has been applied to magnetic force microscopy (MFM) on the ultrahigh-density magnetic recording media with 1200 kilo flux change per inch (kfci).


Author(s):  
Xiukun Hu ◽  
Gaoliang Dai ◽  
Sibylle Sievers ◽  
Alexander Fernandez Scarioni ◽  
Volker Neu ◽  
...  

2009 ◽  
Vol 152-153 ◽  
pp. 241-244
Author(s):  
V. Karoutsos ◽  
Panagiotis Poulopoulos ◽  
M. Angelakeris ◽  
E.T. Papaioannou ◽  
Paul Fumagalli ◽  
...  

Co/Pt multilayers reside among the best candidates for perpendicular magneto-optic recording. In this work, Co/Pt multilayers were prepared by electron-beam evaporation under ultrahigh vacuum conditions on polyimide. X-ray diffraction measurements revealed the high quality of multilayer stacking. Magneto-optic polar Kerr effect experiments were used in order to obtain magnetization hysteresis loops of the films. We have studied the magnetic-domain morphology on the surface of the films via Magnetic Force Microscopy. The field applied during these measurements was 2.3 kOe oriented perpendicular to the film plane; this field seems to stabilize and enhance out-of-plain stripe domains against in plain domains that may be expected from magnetization curves. Finally, we observed that when the applied field approaches the magnetic saturation field, then the domain morphology turns to be dominated by bubble domains.


Sign in / Sign up

Export Citation Format

Share Document