{"id":26347,"date":"2024-07-29T10:41:11","date_gmt":"2024-07-29T08:41:11","guid":{"rendered":"https:\/\/www.linseis.com\/methods-of-thermal-analysis\/4-point-probe-method\/"},"modified":"2024-12-11T14:08:14","modified_gmt":"2024-12-11T13:08:14","slug":"4-point-probe-method","status":"publish","type":"page","link":"https:\/\/www.linseis.com\/en\/methods\/4-point-probe-method\/","title":{"rendered":"4-Point Probe Method"},"content":{"rendered":"\t\t
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4-Point Probe Method<\/b><\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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4-Point Probe Method<\/h2>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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4 point measurement<\/h3>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Standard four-point probe measuring methods are usually used to characterize the electrical conductivity<\/strong><\/a> or the resistivity of a sample, since these are usually straightforward to carry out and the influence of wires and contact resistances on the measurement result can be suppressed. When extended by a magnetic field, the hall constant and from that the charge carrier concentration and hall mobility<\/strong><\/a> can be measured.<\/p>

For a correct measurement, the sample must form a closed area of \u200b\u200bconstant thickness without holes, be electrically insulated and be contacted with four spatially separated electrodes. Commonly, two special cases of four-wire measurement, the Hall bar structure and the Van-der-Pauw measurement, are used with a specific sample geometry and measurement routine.<\/p>

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The four-wire measurement can in principle be used for both macroscopic and nanostructured samples<\/strong>, but the preparation effort depends on the material properties of the sample and the chosen direction of measurement, and can be a challenge under certain circumstances.<\/p>\n

Examples include the creation of electrical contacts with low contact resistance on samples with limited conductivity and the cross-plane measurement of electrical conductivity on thin layers<\/strong>. The former can usually be solved by using large electrodes and the additional use of sample-specific contact pads made of a more suitable material. However, the correct placement of the electrodes for measuring the electrical conductivity in the confinement direction of thin films is more difficult.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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What characteristics does the 4-point probe method determine?<\/h2>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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The four-point probe method is used to determine the electrical transport properties<\/strong> of materials like the electrical conductivity, the resistivity, the hall constant, the charge carrier concentration and the charge carrier mobility.<\/strong><\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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4-Point Probe Method 4-Point Probe Method 4 point measurement Standard four-point probe measuring methods are usually used to characterize the electrical conductivity or the resistivity of a sample, since these are usually straightforward to carry out and the influence of wires and contact resistances on the measurement result can be suppressed. When extended by a […]<\/p>\n","protected":false},"author":3,"featured_media":0,"parent":26322,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"class_list":["post-26347","page","type-page","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.linseis.com\/en\/wp-json\/wp\/v2\/pages\/26347","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.linseis.com\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.linseis.com\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.linseis.com\/en\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.linseis.com\/en\/wp-json\/wp\/v2\/comments?post=26347"}],"version-history":[{"count":0,"href":"https:\/\/www.linseis.com\/en\/wp-json\/wp\/v2\/pages\/26347\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/www.linseis.com\/en\/wp-json\/wp\/v2\/pages\/26322"}],"wp:attachment":[{"href":"https:\/\/www.linseis.com\/en\/wp-json\/wp\/v2\/media?parent=26347"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}