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

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:475

Article; Proceedings Paper

Brambilla, A.¹  Picone, A.¹  Giannotti, D.¹  Calloni, A.¹  Berti, G.^1,5  Hedayat, H.¹  Carpene, E.²  Dallera, C.¹  Zani, M.¹  Vinai, G.³  Torelli, P.³  Foerster, M.⁴  Aballe, L.⁴  Finazzi, M.¹  Duo, L.¹  Ciccacci, F.¹ 

[1] Politecn Milan, Dipartimento Fis, Piazza Leonardo da Vinci 32, I-20133 Milan, Italy

[2] Politecn Milan, Dipartimento Fis, IFN CNR, Piazza Leonardo da Vinci 32, I-20133 Milan, Italy

[3] IOM CNR, Lab TASC, SS 14 Km 163-5, I-34149 Trieste, Italy

[4] ALBA Synchrotron Light Facil, Cerdanyola Del Valles, Spain

[5] Max Planck Gesell, Fritz Haber Inst, Dept Chem Phys, Faradayweg 4-6, D-14195 Berlin, Germany

关键词: Cobalt oxide;    Antiferromagnets;    Magnetic Second Harmonic Generation;    X-ray magnetic dichroism;    X-ray photoelectron emission microscopy;   

DOI  :  10.1016/j.jmmm.2018.11.095

来源: Elsevier

【 摘 要 】

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 in-equivalent. 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.

【 授权许可】

Free