quantumPPMS

Analyzes data files (.dat) generated from VSM modules in the Physical Property Measurement System (PPMS). Extensive documentation is available in the reference manual.

Installation

# install.packages("devtools")
devtools::install_github("thomasgredig/quantumPPMS")

Usage

Loading data from a Quantum Design PPMS data file.

library(quantumPPMS)
filename = ppms.getSampleFiles()[1]
d = vsm.import(filename)
summary(d)
plot(d)

Predecated functions

Some functions in version 0.2 and earlier had different names; use the new functions instead, if help is needed on how to convert the old function, then use vsm.help().

old function	new function
analyze.single.VSM.loop	vsm.analyzeLoop
ppms.dat.info2	vsm.info
vsm.hyst.stats	vsm.hystStats
ppms.load	vsm.import

Hysteresis Loops

Finding data files is easy with the raw.findFiles function from the checkRAWfolder package.

library(quantumPPMS)
fname = vsm.getSampleFiles()[1]
d = vsm.import(fname)

print(d)
plot(d)

# color different loops and correct slope
q = vsm.data.frame(d)
ggplot(q, aes(H, Mcorr, col=loop)) +
  geom_point() + theme_bw()