J Mater Sci Technol ›› 2011, Vol. 27 ›› Issue (3): 218-222.

• Mechanical and Functional Properties of Materials • Previous Articles     Next Articles

Exchange Coupling and Magnetic Behavior of SmCo5-xSnx Alloys

Hamid Zaigham, F. Ahmad Khalid   

  1. Faculty of Materials Science and Engineering, GIK Institute of Engineering Sciences and Technology, Topi, KPK, Pakistan
  • Received:2010-05-14 Revised:2010-11-08 Online:2011-03-28 Published:2011-03-21
  • Contact: Hamid Zaigham

Abstract: Exchange coupling and magnetic properties of SmCo5 alloys containing different amounts of Sn were investigated in sintered magnets. X-ray diffraction analysis revealed the formation of Sm2Co17 and Sm2Co7 phases in SmCo5 matrix. Exchange coupling mechanism was evaluated by switching field distribution, dc-demagnetization and magnetization curves as function of reverse applied field. Energy product of 59.2 kJ/m3 (7.4 MGOe), remanent magnetization to maximum magnetization ratio of 0.97 and remanence coercivity to intrinsic coercivity ratio of 1.75 were achieved for 0.2 at.% Sn.

Key words: Nanocomposite magnet, Nanocrystalline phases, Sintering, Exchange interactions