Physics Lab Equipment

LEAI-16 Microwave Ferromagnetic Resonance Apparatus

LEAI-16 Microwave Ferromagnetic Resonance Apparatus

Note: oscilloscope not included

Features

  • Simple structure

  • High quality microwave devices

  • Ample experimental examples

  • Stable performance



Introduction

Ferromagnetic resonance (FMR) is an important topic in magnetism even in solid state physics. It is the basis of microwave ferrite physics. Microwave ferrite has important applications in radar and microwave communications. This microwave ferromagnetic resonance apparatus is an experimental instrument for measuring the ferromagnetic resonance curve of ferromagnetic samples. The instruction manual contains comprehensive materials including experimental configurations, principles and step-by-step instructions. Please click Experiment Theory and Contents to find more information about this apparatus.

 

Using this apparatus, the following experiments can be conducted:

 

1. Observe microwave ferromagnetic resonance phenomena of ferromagnetic materials.

2. Measure ferromagnetic resonance line width (ΔH) of microwave ferrite materials.

3. Measure the Lande's g-factor of microwave ferrite.

4. Learn how to use a microwave experimental system.

* Some observed experimental results shown at left.


Specifications

Microwave System
Sample2 ( mono-crystal and poly-crystal, one each)
Microwave frequency meterrange: 8.6 GHz ~ 9.6 GHz
Waveguide dimensionsinner: 22.86 mm × 10.16 mm (EIA: WR90 or IEC: R100)
Electromagnet
Input voltage and accuracyMax: ≥ 20 V, 1% ± 1 digit
Input current range and accuracy0 ~ 2.5 A, 1% ± 1 digit
Stability≤ 1x10-3+5 mA
Strength of magnetic field0 ~ 450 mT
Sweep Field
Output voltage≥ 6 V
Output current range0.2 A ~ 0.7 A
Solid State Microwave Signal Source
Frequency
8.6 ~ 9.6 GHz
Frequency drift
≤ ± 5×10-4/15 min
Working voltage
~ 12 VDC
Output power
> 20 mW under equal amplitude mode



Operation mode & parameters

Equal amplitude

Internal square-wave modulation

Repetition frequency: 1000 Hz

Accuracy:   ± 15%

Skewness: < ± 20%

Voltage standing wave ratio
< 1.2
Waveguide dimensions
inner: 22.86 mm × 10.16 mm (EIA: WR90 or IEC: R100)


Parts List

DescriptionQty
Controller Unit1
Electromagnet1
Support Base3
Microwave System1 set (including various microwave components, source, detector, etc)
Sample2 ( mono-crystal and poly-crystal, one each)
Cable1 set
Instructional Manual1

     Apparatus of Microwave Ferromagnetic Resonance.png

Diagram of experimental system

(Click figure to enlarge)


     LEAI-16 Microwave-1.jpg      Output power vs magnetic field

      Magnetic resonance signal on oscilloscope (Y-T mode).jpg

Magnetic resonance signal (Y-T mode)

      Magnetic resonance signal on oscilloscope (X-Y mode).jpg

Magnetic resonance signal (X-Y mode)

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