Exchange-bias-like effect in Pr0.75Tb0.25Al2 and Pr0.7Tb0.3Al2 samples

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:339

Article

Tedesco, J. C. G.¹  Pires, M. J. M.²  Carvalho, A. Magnus G.³  de Sousa, V. S. R.⁴  Cardoso, L. P.¹  Coelho, A. A.¹ 

[1] Univ Estadual Campinas, UNICAMP, Inst Fis Gleb Wataghin, BR-13083859 Campinas, SP, Brazil

[2] Univ Fed Vales Jequitinhonha & Mucuri UFVJM, Inst Ciencia & Tecnol ICT, BR-39100000 Diamantina, MG, Brazil

[3] INMETRO, Div Metrol Mat DIMAT, BR-25250020 Duque De Caxias, RJ, Brazil

[4] Univ Estado Rio de Janeiro UERJ, Inst Fis Armando Dias Tavares, BR-20550013 Rio De Janeiro, RJ, Brazil

关键词: Ferrimagnetism;    Rare earth intermetallic;    Exchange bias;   

DOI  :  10.1016/j.jmmm.2013.02.049

来源: Elsevier

【 摘 要 】

The magnetic behavior of pseudobinary Pr0.7Tb0.3Al2 and Pr0.75Tb0.25Al2 compounds was studied, and a predominant ferrimagnetic ordering was observed. Noteworthy characteristics such as negative magnetization, compensation points and exchange-bias-like (EB-like) effect were found. This EB-like effect was observed at temperatures below the compensation points. The effect is somewhat different from the one already studied in similar systems combining light and heavy rare earths. The results indicate that the EB-like effect characteristics are related to the conduction electron magnetic polarization and an induced unidirectional anisotropy present in these compounds. (c) 2013 Elsevier B.V. All rights reserved.

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