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	<title>P Archives - ARkival Technology Magnetics Lab</title>
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	<title>P Archives - ARkival Technology Magnetics Lab</title>
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		<title>Pulsed Magnetic Measurements &#038; Pulse Analyses (PEMF)</title>
		<link>https://arkival.com/pulsed-magnetic-measurements-pulse-analyses/</link>
		
		<dc:creator><![CDATA[laKival]]></dc:creator>
		<pubDate>Wed, 15 Nov 2023 12:43:33 +0000</pubDate>
				<category><![CDATA[Article]]></category>
		<guid isPermaLink="false">https://arkival.com/?p=3046</guid>

					<description><![CDATA[<p>Magnetic Pulse measurements &#38; Analyses include: Waveform measurement &#38; recording Pulse Measurement (RMS, voltage, or RMS Peak) Digitized Triggering (Rising or Falling edges) Pulse timing durations Frequency measurements True Magnetic Peak measurements The operational design, measurements, instrumentation, robotics and 1D, 2D or 3D data collection can be optimized for specific products and designated target locations&#8230; <br /> <a class="read-more" href="https://arkival.com/pulsed-magnetic-measurements-pulse-analyses/">Read more</a> [...]</p>
<p><a class="btn btn-secondary arkival-read-more-link" href="https://arkival.com/pulsed-magnetic-measurements-pulse-analyses/">Read More...</a></p>
<p>The post <a href="https://arkival.com/pulsed-magnetic-measurements-pulse-analyses/">Pulsed Magnetic Measurements &amp; Pulse Analyses (PEMF)</a> appeared first on <a href="https://arkival.com">ARkival Technology Magnetics Lab</a>.</p>
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										<content:encoded><![CDATA[<p>Magnetic Pulse measurements &amp; Analyses include:</p>
<ul>
<li>Waveform measurement &amp; recording</li>
<li>Pulse Measurement (RMS, voltage, or RMS Peak)</li>
<li>Digitized Triggering (Rising or Falling edges)</li>
<li>Pulse timing durations</li>
<li>Frequency measurements</li>
<li>True Magnetic Peak measurements</li>
</ul>
<p>The operational design, measurements, instrumentation, robotics and 1D, 2D or 3D data collection can be optimized for specific products and designated target locations of/for PEMF focus&#8230; as used in medical &amp; therapeutic applications.</p>
<p>The post <a href="https://arkival.com/pulsed-magnetic-measurements-pulse-analyses/">Pulsed Magnetic Measurements &amp; Pulse Analyses (PEMF)</a> appeared first on <a href="https://arkival.com">ARkival Technology Magnetics Lab</a>.</p>
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		<title>Permeability, Relative Permeability and Susceptibility</title>
		<link>https://arkival.com/permeability-relative-permeability-and-susceptibility/</link>
		
		<dc:creator><![CDATA[laKival]]></dc:creator>
		<pubDate>Mon, 10 Feb 2020 19:10:15 +0000</pubDate>
				<category><![CDATA[Article]]></category>
		<guid isPermaLink="false">https://arkival.com/?p=1356</guid>

					<description><![CDATA[<p>Note: Magnetic parameters of Magnetizing Force (H) and Flux density (B) used for Permeability measurements Permeability is the measure of the resistance of a material against the formation of a magnetic field. It is a measure  of the magnetization that a material obtains in response to an applied magnetic field. Magnetic permeability is typically represented by the&#8230; <br /> <a class="read-more" href="https://arkival.com/permeability-relative-permeability-and-susceptibility/">Read more</a> [...]</p>
<p><a class="btn btn-secondary arkival-read-more-link" href="https://arkival.com/permeability-relative-permeability-and-susceptibility/">Read More...</a></p>
<p>The post <a href="https://arkival.com/permeability-relative-permeability-and-susceptibility/">Permeability, Relative Permeability and Susceptibility</a> appeared first on <a href="https://arkival.com">ARkival Technology Magnetics Lab</a>.</p>
]]></description>
										<content:encoded><![CDATA[<style type="text/css">body.kc-css-system .kc-css-2106081 ,body.kc-css-system .kc-css-2106081 p{font-family: Open Sans;font-weight: 400;}</style>
<figure id="attachment_129" class="wp-caption aligncenter" style="width: 300px;" aria-describedby="caption-attachment-129"><img fetchpriority="high" decoding="async" class="alignnone wp-image-190 size-medium" src="https://arkival.com/wp-content/uploads/2026/04/Hysteresis-Graph-300x194.png" alt="" width="300" height="194" srcset="https://arkival.com/wp-content/uploads/2026/04/Hysteresis-Graph-300x194.png 300w, https://arkival.com/wp-content/uploads/2026/04/Hysteresis-Graph.png 473w" sizes="(max-width: 300px) 100vw, 300px" /><figcaption id="caption-attachment-129" class="wp-caption-text">Note: Magnetic parameters of Magnetizing Force (H) and Flux density (B) used for Permeability measurements</figcaption></figure>
<p><strong>Permeability</strong> is the measure of the resistance of a material against the formation of a magnetic field. It is a measure  of the magnetization that a material obtains in response to an applied magnetic field. Magnetic permeability is typically represented by the Greek letter μ. In general, permeability is not a constant value, as it can vary with the position in the medium, the frequency of the applied magnetic field, humidity, temperature, and other criteria. In a nonlinear medium, the sample permeability can depend on the strength of the magnetic field. Permeability as a function of frequency also addresses real or complex values.</p>
<p>A closely related property of materials is magnetic susceptibility, which is a dimensionless proportionality factor that indicates the degree of magnetization of a material in response to an applied magnetic field.</p>
<p><strong>About Permeability Units</strong></p>
<p>In SI units, permeability is measured in henries per meter (H/m), or equivalently in newtons per ampere squared (N⋅A−2). The permeability constant μ0, also known as the magnetic constant or the permeability of free space, is a measure of the amount of resistance encountered when forming a magnetic field in a classical vacuum.</p>
<p>Until 20 May 2019, the magnetic constant had the exact (defined)<sup id="cite_ref-1" class="reference"></sup> value <i>μ</i><sub>0</sub> = 4<span class="texhtml mvar">π</span> × 10<sup>−7</sup> H/m ≈ <span class="nowrap">12.57×10<sup>−7</sup> H/m</span>.</p>
<p>On 20 May 2019, a revision to the <strong>SI</strong> system went into effect, making the vacuum permeability no longer a constant but rather a value that needs to be determined experimentally;<sup id="cite_ref-2" class="reference"></sup> <span class="nowrap">4<span class="texhtml mvar">π</span> × 1.00000000082(20)×10<sup>−7</sup> H⋅m<sup>−1</sup></span> is a recently measured value in the new system. It is proportional to the dimensionless fine-structure constant with no other dependencies.</p>
<p>In 2019, the <strong>SI</strong> base units were redefined in agreement with the International System of Quantities, effective on the 144th anniversary of the Metric Convention, 20 May 2019. In the redefinition, four of the seven <strong>SI</strong> base units – the kilogram, ampere, kelvin, and mole – were redefined by setting exact numerical values for the Planck constant, the elementary electric charge, the Boltzmann constant, and the Avogadro constant, respectively.</p>
<p>In electromagnetism, the auxiliary magnetic field <strong>H</strong> represents how the magnetic field <strong>B</strong> influences the organization of magnetic dipoles in a given medium, including dipole migration and magnetic dipole reorientation. Its relation to permeability is</p>
<p><span class="mwe-math-element"><img decoding="async" class="mwe-math-fallback-image-inline aligncenter" src="https://wikimedia.org/api/rest_v1/media/math/render/svg/a39244f3c9bf55730932029179ce5972a26d72e7" alt="{mathbf {B}}=mu {mathbf {H}}" aria-hidden="true" /></span></p>
<p>where the permeability, <i>μ</i>, is a scalar if the medium is isotropic or a second rank tensor for an anisotropic medium.</p>
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<p><span id="Relative_permeability_and_magnetic_susceptibility" class="mw-headline"><b>Relative</b> permeability and magnetic susceptibility</span></p>
<p>Relative permeability, denoted by the symbol  <span class="mwe-math-element"><img decoding="async" class="mwe-math-fallback-image-inline" src="https://wikimedia.org/api/rest_v1/media/math/render/svg/bc6a7458faaa5ff5912633d5305ae3c086041a21" alt="{displaystyle mu _{mathrm {r} }}" aria-hidden="true" /></span>, is the ratio of the permeability of a specific medium to the permeability of free space <i>μ</i><sub>0</sub>:</p>
<p><span class="mwe-math-element"><img decoding="async" class="mwe-math-fallback-image-inline aligncenter" src="https://wikimedia.org/api/rest_v1/media/math/render/svg/6aa994cadfef8dde9db94e3ed9c228320dee474a" alt="" width="68" height="39" aria-hidden="true" /></span></p>
<p><span class="mwe-math-element"><img decoding="async" class="mwe-math-fallback-image-inline" src="https://wikimedia.org/api/rest_v1/media/math/render/svg/77d3a4e6d16149e55c3426611a6fe0affd256bd8" alt="{displaystyle mu _{0}approx }" aria-hidden="true" /></span> 4<span class="texhtml mvar">π</span> × 10<sup>−7</sup> N⋅A<sup>−2</sup> is the magnetic permeability of free space.</p>
<p>In terms of relative permeability, the magnetic susceptibility is</p>
<p><span class="mwe-math-element"><img decoding="async" class="mwe-math-fallback-image-inline aligncenter" src="https://wikimedia.org/api/rest_v1/media/math/render/svg/4acd2581f2289959697e67429e408ffb063e9e16" alt="chi_m = mu_r - 1." aria-hidden="true" /></span></p>
<p>The number <i>χ</i><sub>m</sub> is a dimensionless quantity, sometimes called <em>volumetric</em> or <em>bulk</em> susceptibility, to distinguish it from <i>χ</i><sub>p</sub> (<i>magnetic mass</i> or <i>specific</i> susceptibility) and <i>χ</i><sub>M</sub> (<i>molar</i> or <i>molar mass</i> susceptibility).</p>
<p><img decoding="async" class="aligncenter" src="https://upload.wikimedia.org/wikipedia/commons/thumb/0/04/Permeability_by_Zureks.svg/1280px-Permeability_by_Zureks.svg.png" width="136" height="105" /></p>
<p>The post <a href="https://arkival.com/permeability-relative-permeability-and-susceptibility/">Permeability, Relative Permeability and Susceptibility</a> appeared first on <a href="https://arkival.com">ARkival Technology Magnetics Lab</a>.</p>
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