Dresden 2006 – scientific programme

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MM: Metall- und Materialphysik

MM 20: Amorphous and Liquid Materials I

MM 20.5: Talk

Tuesday, March 28, 2006, 15:45–16:00, IFW D

Microstructure controlled magnetic properties of the Zr53Co23,5Al23,5 bulk metallic glasses — •Ahmed Shariq¹, Talaat Al-Kassab¹, Reiner Kirchheim¹, Dmitrij Bogdanov², Konrad Samwer², Qiang Jianbing³, and Chuang Dong⁴ — ¹Institut für Materialphysik, Friedrich Hund platz 1, D 37077, Göttingen, Germany — ²I. Physikalisches Institut, Friedrich Hund platz 1, D 37077, Göttingen, Germany — ³Department of Materials Engineering, Dalian University of Technology, Dalian 116024, China — ⁴State Key Laboratory of Materials Modification, Dalian University of technology, Dalian 116024, China

The unique set of properties offered by the amorphous alloys triggered intensive microstructural investigations in the last few years. The new amorphous alloys have much wider supercooled liquid region defined as the difference between crystallisation and glass transition temperatures and require relatively slower cooling rates. Zr53Co23,5Al23,5 has already been reported as a good glass forming alloy. In the present contribution, the magnetic properties of the bulk metallic glass of the above said system are shown. The bulk sample shows very soft ferromagnetic properties. The crystallization in this system occurs in two steps. With the introduction of the crystalline phase the magnetic properties vary considerably and the bulk sample also shows some magnetic anisotropy. The kinetics of the formation of these crystalline phases as a function of temperature and subsequent effect on the magnetic properties will be discussed.