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written by Larry Engelhardt, Chad Garland, Cameron Rainey, and Austin Freeman
The Quantum Magnetism Analysis Model was created to help students as well as researchers who are studying magnetism.  It provides a very simple interface for defining (theoretical) quantum spin models; sliders are automatically created to vary the parameters in the models; and several plots are automatically created to visualize the results.  Within the program, several measured (experimental) data sets are included for a variety of real molecules.  These provide the opportunity to experience the modeling process by varying the parameters in the model and exploring how the simulated results compare to the measured data.

The interactions between neighboring quantum magnetic moments ("spins") are modeled using the Heisenberg model; calculations are carried out by numerically diagonalizing the matrix representation of the Heisenberg Hamiltonian; and plots display the energy spectrum, magnetization, and magnetic susceptibility as a function of temperature and magnetic field.

This simulation is a "Fully Integrated Tool for Magnetic Analysis in Research & Teaching," so we also refer to it with the acronym "FIT-MART".  FIT-MART was developed using the Easy Java Simulations (EJS) modeling tool.  It is distributed as a ready-to-run (compiled) Java archive.  Double clicking ejs_fitmart.jar file will run the package if Java is installed.  In future versions of this simulation, curricular materials will be included to help students to learn about magnetism, and automated fitting routines will be included to help researchers quickly and easily model experimental data.

FIT-MART was developed using the Easy Java Simulations (EJS) modeling tool.  It is distributed as a ready-to-run (compiled) Java archive.  Double clicking ejs_fitmart.jar file will run the package if Java is installed.

Please note that this resource requires at least version 1.6 of Java.
View the supplemental document attached to this resource
  • FIT-MART: Quantum Magnetism with a Gentle Learning Curve
    The FIT-MART: Quantum Magnetism with a Gentle Learning Curve paper describes how to use FIT-MART to quickly get started simulating quantum magnetism. FIT-MART can be downloaded as a platform-independent executable Java (JAR) le. It allows the user to define (Heisenberg) Hamiltonians by electronically drawing pictures that represent quantum spins and operators. Sliders are automatically generated to control the values of the parameters in the model, and when the values change, several plots are updated in real time to display both the resulting energy spectra and the equilibrium magnetic properties. Several experimental data sets for real magnetic molecules are included in FIT-MART to allow easy comparison between simulated and experimental data, and FIT-MART users can also import their own data for analysis and compare the goodness of fit for different models.
View the source code document attached to this resource
  • Quantum Magnetism Analysis Source Code
    The source code zip archive contains an XML representation of the Quantum Magnetism Analysis Model.  Unzip this archive in your EJS workspace to compile and run this model using EJS.
Subjects Levels Resource Types
Quantum Physics
- General
- Multi-particle Systems
- Spin and Finite Dimensional Systems
- Upper Undergraduate
- Graduate/Professional
- Lower Undergraduate
- Collection
- Instructional Material
= Curriculum support
= Interactive Simulation
Intended Users Formats Ratings
- Learners
- Professional/Practitioners
- Educators
- application/java
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Access Rights: Free access
License: This material is released under a GNU General Public License Version 3 license. Additional information is available.
Rights Holder: Larry Englehardt
Record Cloner: Metadata instance created July 27, 2012 by Wolfgang Christian
Record Updated: Jun 19, 2014 by Wolfgang Christian
Last Update
when Cataloged:
July 27, 2012
Other Collections:
ComPADRE is beta testing Citation Styles!

Record Link
AIP Format
L. Engelhardt, C. Garland, C. Rainey, and A. Freeman, Computer Program QUANTUM MAGNETISM ANALYSIS MODEL, Version 1.0 (2012), WWW Document, (http://www.compadre.org/Repository/document/ServeFile.cfm?ID=12308&DocID=3050).
AJP/PRST-PER
L. Engelhardt, C. Garland, C. Rainey, and A. Freeman, Computer Program QUANTUM MAGNETISM ANALYSIS MODEL, Version 1.0 (2012), <http://www.compadre.org/Repository/document/ServeFile.cfm?ID=12308&DocID=3050>.
APA Format
Engelhardt, L., Garland, C., Rainey, C., & Freeman, A. (2012). Quantum Magnetism Analysis Model (Version 1.0) [Computer software]. Retrieved December 21, 2014, from http://www.compadre.org/Repository/document/ServeFile.cfm?ID=12308&DocID=3050
Chicago Format
Engelhardt, L, C. Garland, C. Rainey, and A. Freeman. "Quantum Magnetism Analysis Model." Version 1.0. http://www.compadre.org/Repository/document/ServeFile.cfm?ID=12308&DocID=3050 (accessed 21 December 2014).
MLA Format
Engelhardt, Larry, Chad Garland, Cameron Rainey, and Austin Freeman. Quantum Magnetism Analysis Model. Vers. 1.0. Computer software. 2012. Java 1.6. 21 Dec. 2014 <http://www.compadre.org/Repository/document/ServeFile.cfm?ID=12308&DocID=3050>.
BibTeX Export Format
@misc{ Author = "Larry Engelhardt and Chad Garland and Cameron Rainey and Austin Freeman", Title = {Quantum Magnetism Analysis Model}, Month = {July}, Year = {2012} }
Refer Export Format

%A Larry Engelhardt
%A Chad Garland
%A Cameron Rainey
%A Austin Freeman
%T Quantum Magnetism Analysis Model
%D July 27, 2012
%U http://www.compadre.org/Repository/document/ServeFile.cfm?ID=12308&DocID=3050
%O 1.0
%O application/java

EndNote Export Format

%0 Computer Program
%A Engelhardt, Larry
%A Garland, Chad
%A Rainey, Cameron
%A Freeman, Austin
%D July 27, 2012
%T Quantum Magnetism Analysis Model
%7 1.0
%8 July 27, 2012
%U http://www.compadre.org/Repository/document/ServeFile.cfm?ID=12308&DocID=3050


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Quantum Magnetism Analysis Model:

Is Based On Easy Java Simulations Modeling and Authoring Tool

The Easy Java Simulations Modeling and Authoring Tool is needed to explore the computational model used in the Quantum Magnetism Analysis Model.

relation by Wolfgang Christian

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