Investigation of Magneto-Impedance Effect of Bilayer Iron Films

Yıl 2017, Cilt: 38 Sayı: 2, 286 - 292, 24.04.2017

Ercüment Yüzüak Gizem Durak Yüzüak

https://doi.org/10.17776/cumuscij.289050

Cited By: 1

Öz

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.

Anahtar Kelimeler

Fe multilayers films, Magnetoimpedance, Sensing element

Çift Katmanlı Demir Filmlerin Manyeto-Empedans Etkilerinin İncelenmesi

Öz

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

Kaynakça

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