PC Micromagnetic Simulator Design Examples

This page contains design examples that were created using the Micromagnetics Simulator program. You can download these designs to your computer and use them as a starting point for your own designs. If you have already installed the MMS Viewer as a plug-in in your browser, you can view these designs online by clicking on any of the links below. Designs containing recorded simulations will be automatically replayed by the Viewer. Available animation-recording controls can be used to replay animations after the Viewer has been launched (consult the User's Manual for more detailed instructions on using animation-recording controls).

Magnetization curves of magnetic cube with uniaxial anisotropy

Parametric simulation illustrating family of magnetization curves of a magnetic cube with a magnetic uniaxial anisotropy strength of 30 Oe along the z (vertical) axis. The parameter is the external field direction as determined by its polar orientation which is varied from 0 to 90 degrees. Polar cuts of the parametric plot reveal sections of the classical Stoner-Wohlfarth asteroid.
Simple parametric magnetic random access memory (MRAM) device characteristics
MRAM device illustrating parametric output of device magnetization and magnetoresistive characteristics. The parameter is the thickness of the free (bottom) layer which is varied from 1 to 10 nm. The characteristics are obtained by subjecting the device to a cyclic field in the longitudinal direction.
Simple MR Spin-Valve Head
Spin-valve magnetoresistive (MR) read-head structure in which magnetization reversal of magnetic layers is modeled using the single-domain approximation. The device is scaled 100 times vertically when displayed, to aid the visualization of the multilayer structure. The pinning layer is a composite structure of two identical permanent magnets of opposite polarity, occupying the same location in space. The interlayer magnetostatic interaction effects of the pinning layer is thus eliminated. The pinned layer is exchange coupled to one of the permanent magnets. The layers of the device are connected in a parallel electrical circuit. The device is subjected to a cyclic external field in the transverse direction (y-axis).
MRAM Spin-Valve Gallery
A collection of interacting magnetic random access memory (MRAM) spin valves of different shapes and sizes, using the single-domain approximation. Each device is modeled by a separate design group. The system is scaled 100 times vertically when displayed, to aid the visualization of the device structures. Characteristic pinning fields are defined for the pinned layers. The system is subjected to a cyclic external field along the x-axis.
MR Read-Head Concept
Illustration of concept of an MR read-head moving over perpendicular media. Different device groups are used to model the MR head and the media. The media is modeled using three permanent magnets with alternating magnetization directions.
Dynamic Cubes
This simulation shows the damped-precession magnetization reversal response of two magnetic cubes having different dynamic properties.
Dynamic Film
Illustration of the dynamic magnetization reversal of a magnetic thin film in response to an applied longitudinal field.
Example showing some recognizable objects. This example illustrates the versatility of the geometric design capabilities of the software.
Example illustrating interacting objects having different properties. Some of the elements move independently and intersect other elements at different stages of their motion.
Back to PC Micromagnetic Simulator main page.

The National Institute of Standards and Technology (NIST) is an agency of the U.S. Commerce Department.

Privacy policy / security notice / accessibility statement / Disclaimer / Freedom of Information Act (FOIA) /
No Fear Act Policy / ExpectMore.gov (performance of federal programs) / NIST Information Quality Standards /
Environmental Policy Statement

Date created: February 10, 1999 | Last updated: April 27, 2011    Contact: Webmaster