Çift Katmanlı Demir Filmlerin Manyeto-Empedans Etkilerinin İncelenmesi

Cam zemin üzerinde manyetik çift katmanlı arasında manyetik olmayan bir tabaka kullanılarak (Fe/Cu/Fe) üretilen manyeto-empedans hücre (ME) elektron mikroskobu, X-ışını kırınımı, manyetik ve manyeto-empedans ölçümleri yapılarak incelenmiştir. ME etkisini gözlemlemek için frekansa bağlı empedans ölçümleri statik düşük manyetik alan altında yapılmıştır. Hücrelerin empedans değeri, 1 - 25 MHz frekans aralığında ve DC manyetik alanda (-25 - 25 Oe) sabit 4 mA AC akım kaynağı kullanılarak karakterize edilmiştir. Çift tepe tepkileri elde edilerek, ME etkisi % 35' e ve duyarlılığı 23.7 %/Oe' e kadar çıkartılmıştır. Gelecekteki sensör uygulamaları için bu malzeme, düşük fiyat aralığında ve kıyasla yüksek hassasiyet özelliklerine sahip dev manyeto-empedans etkisi gösterdiğinden dolayı umut verici bir aday haline getirilmiştir.

Anahtar Kelimeler:

Demir çok katmanlı filmler, Manyetoempedans, Sensör element

Investigation of Magneto-Impedance Effect of Bilayer Iron Films

Magnetoimpedance (MI) cell was fabricated using a non-magnetic layer among magnetic bilayer (Fe/Cu/Fe) on the glass substrate has been studied by using electron microscopy, X-ray diffraction, magnetic and magnetoimpedance measurements. In order to observe MI effect, frequency dependence of impedance measurements has performed under applying static low magnetic fields. The impedance value of the cells has been characterized by using constant 4 mA AC current source at frequencies 1 - 25 MHz and DC magnetic fields (-25 to 25 Oe). Double peak responses have been obtained, showing MI ratios up to % 35 and its sensitivity is around 23.7 %/Oe. For future sensing applications, this material is made a promising candidate for giant magnetoimpedance effect with the range of low price and relatively high sensitivity features.

Keywords:

Fe multilayers films, Magnetoimpedance, Sensing element,

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