Magnetostrictive properties of Tb0.2Gd0.8 single crystal in high magnetic fields

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:510

Article

Nikitin, S. A.¹  Ivanova, T. I.¹  Zvonov, A. I.¹  Koshkid'ko, Yu. S.²  Cwik, J.²  Rogacki, K.² 

[1] Lomonosov Moscow State Univ, Fac Phys, Moscow 119991, Russia

[2] PAS, Inst Low Temp & Struct Res, PL-50950 Wroclaw, Poland

关键词: Magnetic materials;    Magnetostriction;    Single crystal;    Rare-earth alloys;    Magnetocrystalline anisotropy;    High magnetic fields;   

DOI  :  10.1016/j.jmmm.2020.166967

来源: Elsevier

【 摘 要 】

Temperature and field dependencies of the magnetostriction of the Tb0.2Gd0.8 single crystal were measured in strong magnetic fields up to 14 T in a temperature range of 4.2-300 K. The temperature dependencies of five magnetostriction constants lambda(alpha,0)(1), lambda(alpha,0)(2), lambda(alpha,2)(1),lambda(alpha,2)(2) and lambda(nu,2) were determined, using Clark's theory for rare-earth hexagonal close-packed single crystals. Giant values of linear and volume magnetostriction due to forced magnetostriction were found in the Tb0.2Gd0.8 single crystal (lambda(bc) = 1.6 x 10(-3)) in the region of the Curie temperature (near room temperatures). It is shown that giant values of forced magnetostriction are caused by the sharp dependence of exchange interactions on interatomic distances along the hexagonal the c axis.

【 授权许可】

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