# LongHCPulse: Long Pulse Heat Capacity on a Quantum Design PPMS

## TL;DR

LongHCPulse is software that enables efficient long-pulse heat capacity measurements on Quantum Design PPMS systems, allowing detailed study of first order transitions with reduced measurement time and integrated plotting tools.

## Contribution

The paper introduces LongHCPulse, a novel software tool that implements a long-pulse method for heat capacity measurement, improving speed and capability over existing techniques.

## Key findings

- Enables heat capacity measurement over 30-minute long pulses.
- Reduces measurement time by a factor of five.
- Successfully applied to ${
m Yb_{2}Ti_{2}O_{7}}$ data, matching standard methods.

## Abstract

This paper presents LongHCPulse: software which enables heat capacity to be collected on a Quantum Design PPMS using a long-pulse method. This method, wherein heat capacity is computed from the time derivative of sample temperature over long (30 min) measurement times, is necessary for probing first order transitions and shortens the measurement time by a factor of five. LongHCPulse also includes plotting utilities based on the Matplotlib library. I illustrate the use of LongHCPulse with the example of data taken on ${\rm Yb_{2}Ti_{2}O_{7}}$, and compare the results to the standard semi-adiabatic method.