File:Première observation de l effet Hopkinson.svg
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Français : Première observation de l'effet Hopkinson, lors de la mesure de la susceptibilité magnétique d'un échantillon de fer en fonction de la température. En pointillés, courbe lorsque l'échantillon est placé sous champ fort, qui ne montre pas l'effet ; en trait plein, lorsque l'échantillon est placé sous un champ douze fois plus faible, qui montre un pic pour une température légèrement plus faible que la température de Curie (valeur exacte du champ inconnue, les unités étant anciennes).
English: First observation of Hopkinson effect during the measurement of magnetic susceptibility of an iron sample as a function of temperature. In dash, curve of the sample in high field, which does not show the effect. In full line, sample under a field twelve time smaller, which features a peak for a temperature slightly lower than the Curie temperature (the exact value of the field is not known to me due to the very old measurement unit system used).
Português: Primeira observação do efeito Hopkinson, durante a medição da suceptibilidade duma amostra de ferro em função da temperatura. A linha ponteada mostra a evolução sob campo alto (onde o efeito não aparece). A outra linha, sob um campo doze vezes menor, mostra um pico para uma temperatura ligeiramente inferior à temperatura de Curie (não conheco o valor exacto do campo, por causa da antiguidade do sistema de unidades utilisada na publicação). |
| Date | |
| Source | Données expérimentales mesurées sur la publication d'origine (J. Hopkinson, Phil. Trans. Roy. Soc., 1889, pp. 443-465) et redessinées par mes soins. |
| Author | Cæruleum (talk) |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 16:57, 25 December 2006 | | 162 × 153 (33 KB) | Cæruleum (talk | contribs) | {{Information |Description= Première observation de l'effet Hopkinson, lors de la mesure de la susceptibilité magnétique d'un échantillon de fer en fonction de la température. En pointillés, courbe lorsque l'échantillon est placé sous champ fort, |
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