TXEMM | MATERIALS · TESTING
AC Permeability Testing
Frequency-Dependent Magnetic Properties & Loss Characterization
Measure complex permeability, magnetic losses, and AC response of soft magnetic materials under controlled excitation.
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Understand How Your Material Responds Under AC Excitation
Understand How Your Material Responds Under AC Excitation
Understand the behavior, outputs and applications covered by AC permeability characterization
AC Permeability Testing
Measures complex permeability under AC excitation to capture frequency-dependent storage and loss behavior.
What It Tells You
Initial permeability (μi)
Complex permeability (μ′, μ″)
Frequency dependence
Loss-related behavior
Sensitivity to field amplitude
Typical Applications
Inductors
Transformers
Ferrites
EMI suppression
RF components
Soft magnetic cores
Best For
Ferrites, soft magnetic alloys, powder cores, amorphous and nanocrystalline materials, and laminated magnetic materials where frequency-dependent permeability, magnetic loss, and resonance behavior are important.
Ideal when AC behavior affects efficiency, impedance, EMI response, or operating frequency, and when comparing materials or evaluating processing and stress effects.
What TXEMM Can Measure
What TXEMM Can Measure
Connect AC testing to permeability, loss and frequency-response data for your engineering decision
Permeability vs. Frequency
Measure how μ′ and μ″ vary across decades of frequency.
Complex Permeability
Extract complex permeability to quantify storage and loss components.
Amplitude Dependence
Evaluate how permeability and loss change with excitation amplitude.
Temperature Dependence
Assess the effect of temperature on frequency-dependent performance.
Sample Format & Test Considerations
Sample Format & Test Considerations
Sample geometry, winding and test conditions affect AC permeability results.
Ring-Core Sample
Ring-Core Sample
Geometry:
Toroidal core with uniform cross-section.
Sample Size:
OD 1.50 in · ID 1.25 in · t ~0.014 in
Before Shipping:
Other dimensions may be possible — contact us first.
Strip / Ribbon
Strip / Ribbon
Geometry:
Width, thickness, and edge condition matter.
Winding/Fixture:
Uniform, tight windings over the test section.
Control:
Minimize strain and define test length.tions affect AC permeability results.
Laminated Specimen
Laminated Specimen
Geometry:
Lamination factor and stacking affect results.
Winding/Fixture:
Insulated, low-leakage winding setup.
Control:
Magnetizing field, frequency, and temperature.
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