Temperature dependence of large exchange-bias in TbFe-Co/Pt

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Romer S., Marioni M., Thorwarth K., Joshi N., Corticelli C., Hug H., ...Daha Fazla

Applied Physics Letters, cilt.101, sa.22, 2012 (SCI-Expanded, Scopus)

• Yayın Türü: Makale / Tam Makale
• Cilt numarası: 101 Sayı: 22
• Basım Tarihi: 2012
• Doi Numarası: 10.1063/1.4767142
• Dergi Adı: Applied Physics Letters
• Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
• Açık Arşiv Koleksiyonu: AVESİS Açık Erişim Koleksiyonu
• İstanbul Yeni Yüzyıl Üniversitesi Adresli: Hayır

Özet

The exchange-bias effect provides unidirectional anisotropy to ferromagnetic thin-films in GMR and TMR sensors. It is weak because it relies on an inherently compensated coupling across a ferromagnet/antiferromagnet interface. We replace the antiferromagnet with a TbFe-based perpendicular- anisotropy amorphous ferrimagnet, coupling to an adjacent ferromagnet with 13 - 5 mJ/m2 for temperatures within 7.9-280 K. A large exchange-bias between 1.1 and 0.7 T in that temperature range ensues. The temperature dependence of the bias is step-like, and thus different from that of antiferromagnet-based exchange-bias systems. It suggests using this material in exchange-biased temperature assisted magnetic writing. © 2012 American Institute of Physics.