{"id":95,"date":"2015-12-09T13:55:03","date_gmt":"2015-12-09T13:55:03","guid":{"rendered":"http:\/\/labfiz.uwb.edu.pl\/lab\/magmicroscope\/?page_id=95"},"modified":"2016-03-14T20:44:47","modified_gmt":"2016-03-14T19:44:47","slug":"experimental-set-up","status":"publish","type":"page","link":"http:\/\/labfiz.uwb.edu.pl\/lab\/magmicroscope\/?page_id=95&lang=en","title":{"rendered":"Experimental Set-up."},"content":{"rendered":"

General scheme of remote type of experimental set-up is shown in Fig. 4.1. Fig. 4.2 illustrates technical solution for our remote experiment „Magnetism by Internet”. In a remote experiment Internaut could : (i) change experimental conditions (in our case: amplitude of external magnetic field H; a angle between polaryzer and analyzer); (ii) choose parameters for measurements (in our case number of measurements used for signal averaging); (iii) receive measured data (in our case: voltage-signal V(H,a) from the light detector in the microscope; magnetic domain images I(H,a) from the microscope; live-image of experimental set-up – an example is shown in Fig.4.3. CGI ( Common Geteway Interface ) enables communication between www server and the computer driving the experiment. Experimental data are available for Internaut by dynamically generated www pages.<\/p>\n\n\n\n\n
\"\"<\/td>\n<\/tr>\n
Fig 4.1 Scheme of remote experiment<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Our experimental set-up is based on polarizing optical microscope with: (i) computer driven step motor changing polaryzer position; (ii) the sample – garnet film is placed in air coil producing magnetic field H perpendicular to the film plane, the computer driven power supply allows H amplitude changes; (iii) two light detectors – CCD camera and light diode.<\/p>\n

Four types of experiment are available :<\/h4>\n
    \n
  1. Study of Malus law and Faraday effect<\/a><\/li>\n
  2. Registration of magnetic hysteresis loop<\/a><\/li>\n
  3. Observation of magnetic domains<\/a><\/li>\n
  4. Observation of experimental setup on-line<\/a><\/li>\n<\/ol>\n

    The proposed experiments give opportunities to reach different levels of understanding (qualitative and quantitative) of basic magnetism. The experiments are supported by different levels of theoretical descriptions presented in chapters 1-3. Using the description an Internaut could determine different material parameters such as : Faraday rotation angle, domain wall energy, magnetization saturation,…<\/p>\n

    The goals of the following experiments are:<\/h4>\n
      \n
    1. to study physics of magnetization processes;<\/li>\n
    2. to measure domain sizes and register the magnetic hysteresis loop of a thin garnet film;<\/li>\n
    3. to understand the physics of simplest domain structure – stripe domain structure, and determination of the material parameters of a given film;<\/li>\n
    4. to learn the magnetooptical domain imaging technique.<\/li>\n<\/ol>\n\n\n\n\n
      \"\"<\/td>\n<\/tr>\n
      Fig. 4.1 Scheme of our remote experiment Magnetizm by Internet<\/strong>.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n
      \"\" \"\"<\/td>\n<\/tr>\n
      Fig 4.3 Image of experimenta set-up optical microscope with living <\/em>object working aquarium with fishes.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

      General scheme of remote type of experimental set-up is shown in Fig. 4.1. Fig. 4.2 illustrates technical solution for our remote experiment „Magnetism by Internet”. In a remote experiment Internaut could : (i) change experimental conditions (in our case: amplitude of external magnetic field H; a angle between polaryzer and analyzer); (ii) choose parameters for […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":314,"menu_order":20,"comment_status":"closed","ping_status":"closed","template":"","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[22],"tags":[],"class_list":["post-95","page","type-page","status-publish","hentry","category-descriptions","post"],"_links":{"self":[{"href":"http:\/\/labfiz.uwb.edu.pl\/lab\/magmicroscope\/index.php?rest_route=\/wp\/v2\/pages\/95","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/labfiz.uwb.edu.pl\/lab\/magmicroscope\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"http:\/\/labfiz.uwb.edu.pl\/lab\/magmicroscope\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"http:\/\/labfiz.uwb.edu.pl\/lab\/magmicroscope\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/labfiz.uwb.edu.pl\/lab\/magmicroscope\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=95"}],"version-history":[{"count":4,"href":"http:\/\/labfiz.uwb.edu.pl\/lab\/magmicroscope\/index.php?rest_route=\/wp\/v2\/pages\/95\/revisions"}],"predecessor-version":[{"id":395,"href":"http:\/\/labfiz.uwb.edu.pl\/lab\/magmicroscope\/index.php?rest_route=\/wp\/v2\/pages\/95\/revisions\/395"}],"up":[{"embeddable":true,"href":"http:\/\/labfiz.uwb.edu.pl\/lab\/magmicroscope\/index.php?rest_route=\/wp\/v2\/pages\/314"}],"wp:attachment":[{"href":"http:\/\/labfiz.uwb.edu.pl\/lab\/magmicroscope\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=95"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/labfiz.uwb.edu.pl\/lab\/magmicroscope\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=95"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/labfiz.uwb.edu.pl\/lab\/magmicroscope\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=95"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}