Comment on “Exchange bias in the layered cobaltite Sr1.5Pr0.5CoO4” [J. Appl. Phys. 104, 023914 (2008)] | Zendy

J. Geshev | Zendy

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Comment on “Exchange bias in the layered cobaltite Sr1.5Pr0.5CoO4” [J. Appl. Phys. 104, 023914 (2008)]

Author(s) -

J. Geshev

Publication year - 2009

Publication title -

journal of applied physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.699

H-Index - 319

eISSN - 1089-7550

pISSN - 0021-8979

DOI - 10.1063/1.3098262

Subject(s) - cobaltite , condensed matter physics , magnetization , exchange bias , hysteresis , ferromagnetism , magnetic hysteresis , physics , coupling (piping) , magnetic field , materials science , magnetic anisotropy , quantum mechanics , metallurgy

Ang et al. [J. Appl. Phys. 104, 023914 (2008)] recently reported magnetization hysteresis loops shifted along both field and magnetization axes of layered cobaltites. The authors claimed that these shifts are characteristics of the exchange-bias phenomenon associated with coupling between ferromagnetic and spin-glass regions. The present comment affirms that their work shows no proofs supporting the observation of exchange bias since, due to lack of magnetic reversibility at high magnetic fields, all hysteresis loops displaced from the origin are actually minor loops naturally shifted along both axes.

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