Determination of Magnetic Field Induced Martensitic Transformation Properties in Mo Added NiMnSbB Alloys

Öz

In this study, the structural and magnetic properties of Ni50-xMoxMn37Sb13+B2 (x=0, 1, 3, 5 ve 7) ferromagnetic shape memory Heusler alloys were investigated. According to XRD analyses performed at room temperature, 4O and 10M phases coexist in M0 and M1 samples, while M3, M5 and M7 samples have cubic L21 crystal structures. As a result of temperature dependent magnetization analysis (M-T), it was determined that all samples produced exhibited martensitic transformation. Phase transition temperatures decreased with increasing Mo content. In addition, increasing the Mo content led to a significant increase in the magnetization of both the martensite and the austenite phase. In the last section, it is revealed that the samples exhibit magnetic field-induced martensitic transformation at constant temperatures determined in the As-Af range.

Anahtar Kelimeler

• Martensitic transformation.
• Magnetic field induced martensitic phase transformation
• Magnetic shape memory.

Mo Eklenmiş NiMnSbB Alaşımlarında Manyetik Alan Kaynaklı Martensitik Dönüşüm Özelliklerinin Belirlenmesi

Öz

Bu çalışmada, Ni50-xMoxMn37Sb13+B2 (x=0, 1, 3, 5 ve 7) ferromanyetik şekil hafızalı Heusler alaşımlarının yapısal ve manyetik özellikleri incelenmiştir. Oda sıcaklığında gerçekleştirlen XRD analizlerine göre M0 ve M1 numunelerinde 4O ve 10M fazları bir arada bulunurken M3, M5 ve M7 numuneleri ise kübik L21 kristal yapısına sahiptir. Sıcaklığa bağlı manyetizasyon analizleri (M-T) sonucunda, üretilen bütün numunelerin martensitik dönüşüm sergiledikleri belirlenmiştir. Faz geçiş sıcaklıkları artan Mo oranı ile azalmıştır. Ayrıca Mo oranın artırılması hem martensit hemde ösenit fazın manyetizasyonunda dikkate değer bir artışa yol açmıştır. Son bölümde ise As-Af aralığında belirlenen sabit sıcaklıklarda numunelerin manyetik alan kaynaklı martensitik dönüşüm sergiledikleri açığa çıkarılmıştır.

Anahtar Kelimeler

• Martensitic transformation. Magnetic field induced martensitic phase transformation. Magnetic shape memory.
• Martensitic transformation.
• Magnetic field induced martensitic phase transformation
• Magnetic shape memory.

Kaynakça

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