Tekin İZGİ, Nevzat BAYRİ, Selçuk ATALAY, Veli Serkan KOLAT, Melike PEKTAŞ

CoSiB Tellerin Manyeto-empedansında Isıl İşlem Etkisi

Bu çalışmada Co72.5Si12.5B15 tellerde Manyeto-empedans (ME) etkinin ısıl işleme bağlılığı incelenmiştir. Numuneler 460°C’de farklı sürelerde ısıtılmıştır (1-400 dakika). Düşük süreli ısıl işlemlerin manyetik yumuşaklıkta artışa yol açtığı bulunmuştur. MI değerinde en büyük değişim 1MHz frekans değerinde gözlenmiştir. MI, Hc ve maksimum alan hassasiyet (S) değerleri 460 °C’de 10 dakika ısıl işlemde sırasıyla %247, 1.28 A/m ve A/m başına %1.35 olarak belirlenmiştir. Düşük ısıl işlem süresinde ortaya çıkan bu yüksek MI ve alan hassasiyet değeri bu telin düşük manyetik alan sensörlerinin tasarımında kullanılabileceğini göstermektedir.

Annealing effect on Magneto-impedance in CoSiB wires

In this study, thermal treatments dependence of Magneto-impedance (MI) effect in Co72.5Si12.5B15 wires has been investigated. Wires were annealed at 460 °C for different times (1- 400 min). It was found that low time annealed leads to increase in magnetic softness. The largest change in the MI was observed at 1 MHz frequency value. It was determined that maximum MI, coercivity (Hc) and maximum field sensitivity (S) values were 247%, 1.28 A/m and 1.35% per A/m respectively in the wire annealed at 460 °C for 10 minutes. This high MI and field sensitivity value occurring in low annealed time shows that this wire can be used in the design of low magnetic field sensors.

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