In superparamagnetism (a form of magnetism), the Néel effect appears when a superparamagnetic material in a conducting coil is subject to varying frequencies of magnetic fields. The non-linearity of the superparamagnetic material acts as a frequency mixer, with voltage measured at the coil terminals. It consists of several frequency components, at the initial frequency and at the frequencies of certain linear combinations. The frequency shift of the field to be measured allows for detection of a direct current field with a standard coil.
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| - Effet Néel (fr)
- Effetto Néel (it)
- Néel effect (en)
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| - In superparamagnetism (a form of magnetism), the Néel effect appears when a superparamagnetic material in a conducting coil is subject to varying frequencies of magnetic fields. The non-linearity of the superparamagnetic material acts as a frequency mixer, with voltage measured at the coil terminals. It consists of several frequency components, at the initial frequency and at the frequencies of certain linear combinations. The frequency shift of the field to be measured allows for detection of a direct current field with a standard coil. (en)
- L’effetto Néel appare nel momento in cui un materiale superparamagnetico posizionato all'interno di una bobina conduttrice, è sottoposto a dei campi magnetici di diverse frequenze. La non linearità del materiale superparamagnetico agisce come un mixer di frequenze. La tensione misurata ai capi della bobina comprende allora diverse componenti di frequenza, non soltanto alle frequenze d'origine, ma anche a alcuni valori dati dalla loro combinazione lineare. In questo modo, la trasposizione in frequenza del campo da misurare permette di individuare un campo, prodotto da una corrente continua, con una semplice bobina.« Effet Néel » et « Neel Effect » sono dei marchi depositati e detenuti dalla società Neelogy. (it)
- L’effet Néel apparaît lorsqu’un matériau superparamagnétique placé à l’intérieur d’une bobine conductrice est soumis à des champs magnétiques de fréquences différentes. La non-linéarité du matériau superparamagnétique agit comme un mélangeur de fréquences. La tension mesurée aux bornes de la bobine comprend alors plusieurs composantes fréquentielles, non seulement aux fréquences d’origine, mais aussi à certaines de leurs combinaisons linéaires. Ainsi, la transposition en fréquence du champ à mesurer permet de détecter un champ produit par un courant continu avec une simple bobine. (fr)
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| - In superparamagnetism (a form of magnetism), the Néel effect appears when a superparamagnetic material in a conducting coil is subject to varying frequencies of magnetic fields. The non-linearity of the superparamagnetic material acts as a frequency mixer, with voltage measured at the coil terminals. It consists of several frequency components, at the initial frequency and at the frequencies of certain linear combinations. The frequency shift of the field to be measured allows for detection of a direct current field with a standard coil. (en)
- L’effet Néel apparaît lorsqu’un matériau superparamagnétique placé à l’intérieur d’une bobine conductrice est soumis à des champs magnétiques de fréquences différentes. La non-linéarité du matériau superparamagnétique agit comme un mélangeur de fréquences. La tension mesurée aux bornes de la bobine comprend alors plusieurs composantes fréquentielles, non seulement aux fréquences d’origine, mais aussi à certaines de leurs combinaisons linéaires. Ainsi, la transposition en fréquence du champ à mesurer permet de détecter un champ produit par un courant continu avec une simple bobine. « Effet Néel » et « Neel Effect » sont des marques déposées et détenues par la société Neelogy. (fr)
- L’effetto Néel appare nel momento in cui un materiale superparamagnetico posizionato all'interno di una bobina conduttrice, è sottoposto a dei campi magnetici di diverse frequenze. La non linearità del materiale superparamagnetico agisce come un mixer di frequenze. La tensione misurata ai capi della bobina comprende allora diverse componenti di frequenza, non soltanto alle frequenze d'origine, ma anche a alcuni valori dati dalla loro combinazione lineare. In questo modo, la trasposizione in frequenza del campo da misurare permette di individuare un campo, prodotto da una corrente continua, con una semplice bobina.« Effet Néel » et « Neel Effect » sono dei marchi depositati e detenuti dalla società Neelogy. (it)
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