Intermag 2022 Paper AA-05 (EOF-08) : Data Files & Scripts
This page gives all the information needed to reproduce the FORC+ results in
paper AA-05 (EOF-08) at the MMM-Intermag meeting in New Orleans, Jan. 11, 2022:
"FORC Analysis of Nanopatterned vs. Unpatterned Films: Coercivity and Switching Mechanisms", by
Alecsander D. Mshar, Allen G. Owen, Daniel D. Arnold, P. B. Visscher, Randy K. Dumas, and Subhadra Gupta (University of Alabama).
(Full paper, as accepted for conference proceedings, can be downloaded here.)
Each calculation requires
- a FORC+ executable,
- a FORC data file, and
- a script (instruction) file.
To get started, download the latest (beta) version (1.84) of the executable code, and a script file default.scrpt.
There are two FORC data files on this server. They are measured with the maximum thickness multilayer (12 CoPd bilayers).
- "Unpat.txt" has the FORC data of the unpatterned film, and
- "Patterned.txt" that of the film patterned and etched for 2.5 minutes at an etch angle (see the paper text) of 35 degrees.
With these data files, you can reproduce (or modify)
- Fig. 2: Drag Unpat.txt to FORC+...exe. To zoom in on the region shown in Fig. 2, move the cursor (using the arrow keys) to the lower right of the upper left M(H,HR) window (where the "x" is in Fig. 2(c)). In the lower left FORC distribution window, this will be near the orange peak. Then press (capital) Z twice to zoom in, centered on the cursor. To increase/decrease color oversaturation, press capital/lower case "C".
In general, it's useful to watch the console (text) window (make sure it's not hidden by the graphics window) because it will often tell you what you're doing. Here is a complete list of the keyboard commands, if you're curious. For example, "w" toggles between black and white background.
- Fig. 3: Exit from FORC+ (press "Esc" -- the x at the upper right that usually closes a window doesn't work yet in FORC+). Drag the other file Patterned.txt to the executable. (Figure 3 is not zoomed.)
- Fig. 4: You don't need to restart FORC+ -- just put the cursor near the positive (orange) peak (or whatever you want to zoom on) and press "Z".
The FORC+ code has been developed by P. B. Visscher.
To return to the main FORC+ website (MagVis.org) click here.