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A Simple Automated System for Hall Effect
Measurements
(Sistem Automasi Ringkas untuk Pengukuran Kesan Hall)
Ariffin Abas
, Z.A.Talib & Z.A.Wahab
Department of Physics, Universiti
Putra Malaysia, 43400 Serdang Selangor, D.E. Malaysia
S.A. Halim*
Institute of Mathematical
Research (INSPEM), Universiti Putra Malaysia,
43400 Serdang Selangor, D.E. Malaysia
Diserahkan: 29 Jun 2011 / Diterima:
29 November 2011
ABSTRACT
This project deals with the development
of a computer interfacing technique for the study of Hall effect. A stepper
motor with resolution of 0.1 mm was used to move a pair of permanent magnet
backward and forward against the sample. The General Purpose Interface Bus (GPIB) card
together with a digital nanovoltmeter and teslameter using serial port siri RS232,
interface were used to measure the potential difference and magnetic field
strength, respectively. Hall effect for YBa2Cu3-xTixO7-δ system
(x=0.00, 0.01, 0.03 and 0.05) showed positive sign Hall coefficient showing
that the material is a hole type carrier at room
temperature. Parameters such as Hall coefficient and charge carrier
concentration were also display on the front panel of Lab View programming.
Keywords: Charge carrier concentration;
Hall coefficient; Hall effect
ABSTRAK
Projek ini berkaitan
dengan pembangunan teknik antaramuka untuk mengkaji kesan Hall. Sebuah
motor pelangkah dengan resolusi 0.1 mm digunakan untuk menggerakkan sepasang
magnet kekal ke hadapan dan belakang terhadap bahan ujian. Kad kegunaan am
antaramuka bas (GPIB) bersama dengan
nanovoltmeter dan teslameter menggunakan port siri RS232,
masing-masing digunakkan untuk mengukur beza keupayaan dan kekuatan medan magnet. Kesan Hall untuk sistem YBa2Cu3-xTixO7-δ (x=0.00,
0.01, 0.03 dan 0.05) yang telah dikaji menunjukkan sistem adalah didominasi
oleh lohong pada suhu bilik. Parameter seperti koefisien Hall dan
ketumpatan pembawa cas juga dipaparkan pada panel
hadapan program Lab view.
Kata kunci:
Kesan Hall; ketumpatan pembawa cas, koefisien Hall
RUJUKAN
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*Pengarang untuk surat-menyurat; email: ahalim@science.upm.edu.my
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