Project Geeker

Posted 2023-11-17Updated 2023-11-19Software2 minutes read (About 360 words)

Introduction

An I-V curve measurement is performed by applying a series of voltages to the device. At each voltage, the current flowing through the device is measured. The supplied voltage is measured by a voltmeter connected in parallel to the device, and the current is measured by an ammeter connected in series. This voltmeter and ammeter can now be integrated to SMU: Source Measure unit, which has been used in this project.

Posted 2023-11-16Updated 2023-11-19Software3 minutes read (About 483 words)

AHEMS - Anomalous Hall Effect Measurement System

Reference

The following paper shouold be referred to to understand the Anomalous Hall Effect:

[1] N. Nagaosa, J. Sinova, S. Onoda, A. H. MacDonald, and N. P. Ong, “Anomalous Hall effect,” Rev. Modern Phys., vol. 82, no. 2, pp. 1539–1592, May 2010, doi: 10.1103/RevModPhys.82.1539.

Introduction

AHE Measurement System GUI

Posted 2023-10-15Updated 2023-12-18Software / Automation5 minutes read (About 714 words)

AutoVA - Automated VCMA & AHE Measurement System

AutoVA - Automated VCMA/(magnetoelectric coupling) - Anomalous Hall effect Measurement System.

The software is used to control :

The E-field applied for the VCMA/Magnetoelectric coupling. (with the ramping function).
1. The E-fields can have multi-variants - (dwelling, pulser).
The electromagnetic filed.
The Soure Measure Unit (SMU) to apply one bias-current, and meanwhile measuring the Hall Voltage. Hysteresis loops can be obtained by looping the electromagnetic field.

The software has following features:

AutoVA_1.0.0