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Magnetic properties of the CoO/Fe(001) system with a bottom-up engineered interface

Brambilla, A. ; Picone, A. ; Giannotti, D. ; Calloni, A. ; Berti, G. ; Hedayat, H. ; Carpene, E. ; Dallera, C. ; Zani, M. ; Vinai, G. ; Torelli, P. ; Foerster, M. ; Aballe, L. ; Finazzi, M. ; Duò, L. ; Ciccacci, F.

Journal of magnetism and magnetic materials, 2019-04, Vol.475, p.54-59 [Periódico revisado por pares]

Amsterdam: Elsevier B.V

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Título:
Magnetic properties of the CoO/Fe(001) system with a bottom-up engineered interface
Autor: Brambilla, A. ; Picone, A. ; Giannotti, D. ; Calloni, A. ; Berti, G. ; Hedayat, H. ; Carpene, E. ; Dallera, C. ; Zani, M. ; Vinai, G. ; Torelli, P. ; Foerster, M. ; Aballe, L. ; Finazzi, M. ; Duò, L. ; Ciccacci, F.
Assuntos: Antiferromagnetism ; Antiferromagnets ; Buffer layers ; Cobalt ; Cobalt oxide ; Emission analysis ; Emission microscopy ; Iron ; Magnetic anisotropy ; Magnetic domains ; Magnetic properties ; Magnetic Second Harmonic Generation ; Magnetism ; Magnetization reversal ; Photoelectrons ; Second harmonic generation ; Thickness ; X-ray magnetic dichroism ; X-ray photoelectron emission microscopy
É parte de: Journal of magnetism and magnetic materials, 2019-04, Vol.475, p.54-59
Descrição: •Magnetic properties of ultrathin CoO grown on Fe(001) using a Co buffer layer.•Samples have no Fe oxides at the interface and show uniaxial magnetic anisotropy.•CoO ultrathin films are antiferromagnetically ordered at room temperature.•Magnetic domains in CoO, in Co and in Fe mimic each other and reverse together.•Magnetic 2nd Harmonic Generation suggests pinned magnetic moments at the interface. Ultrathin CoO films can be grown onto Fe(001) by exploiting Co buffer layers with nanometer thickness, with the result of avoiding the formation of Fe oxides at the interface. Such a system is characterized by a magnetic anisotropy that influences the magnetization reversal behavior, making the Fe easy magnetization axes inequivalent. Here, we exploit Magnetic Second Harmonic Generation to show that such an anisotropy is related to the buried interface and that it is not related to the magnetic properties of the antiferromagnetic CoO layer. In fact, CoO is magnetically ordered already at room temperature, even for low thicknesses and independently on the presence of Fe oxides. The magnetic domains configuration of CoO mimics those of both Fe and Co in all cases, as testified by magnetic PhotoElectron Emission Microscopy measurements.
Editor: Amsterdam: Elsevier B.V
Idioma: Inglês

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Magnetic properties of the CoO/Fe(001) system with a bottom-up engineered interface

Brambilla, A. ; Picone, A. ; Giannotti, D. ; Calloni, A. ; Berti, G. ; Hedayat, H. ; Carpene, E. ; Dallera, C. ; Zani, M. ; Vinai, G. ; Torelli, P. ; Foerster, M. ; Aballe, L. ; Finazzi, M. ; Duò, L. ; Ciccacci, F.

Amsterdam: Elsevier B.V

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