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Engineering exchange bias and bias temperature by modulating the spin glassy state in single phase Bi9Fe5Ti3O27

Abstract

Exchange anisotropy was observed normally at ferromagnetic (FM) / anti-ferromagnetic (AFM) interfaces and also usually at low temperatures. An effective way to find new single phase materials with strong exchange bias (EB) and with high operation temperatures is required for making them in practical applications of future spintronic devices. In this work, the exchange bias behaviors of single phase Bi9Fe5Ti3O27 (BFT) were found able to be manipulated by altering its spin glassy state, when the material was intentionally prepared in the nanobelt format. A core-shell model was proposed to explain the controllable behavior of both exchange bias and bias temperature, in which the AFM domain could be effectively depressed within the nanobelts when changing their particle sizes. A direct observation of two spin glassy behaviors corresponding to two distinct peaks in the zero field cooling (ZFC) curves manifests the validity of the proposed core-shell model.

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Publication details

The article was received on 27 Mar 2017, accepted on 14 May 2017 and first published on 16 May 2017


Article type: Paper
DOI: 10.1039/C7NR02156A
Citation: Nanoscale, 2017, Accepted Manuscript
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    Engineering exchange bias and bias temperature by modulating the spin glassy state in single phase Bi9Fe5Ti3O27

    R. Peng, G. Wang, H. Yang, J. Wang, S. Sun, Z. Fu, X. Zhai, R. J. Knize and Y. lu, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR02156A

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