Magnetic properties of Mn3O4 film with a coexistence of two preferential orientations

Abstract

A Mn3O4 film with a coexistence of two preferential orientations has been grown on a Pt(111)//Si(100) substrate by plasma-assisted molecular beam epitaxy. The structural characteristics and chemical compositions of the film are investigated by using X-ray diffraction, Raman, and X-ray photoelectron spectra in detail. Together with the magnetic tests, the film is demonstrated to be a polycrystalline hausmannite Mn3O4 with no other impurities. Moreover, the hysteresis loops of the film are found to display a step or a characteristic shrinking at low fields. On the other hand, similar magnetic characteristics have also been discovered on the film with two phases grown on a MgAl2O4(001) substrate. In our opinion, considering the large magnetocrystalline anisotropy and shape anisotropy of the single crystal Mn3O4 film reported in previous works, the special structures and phases of the two films result in both of them as soft+hard magnetic composites, in agreement with some other reports.

Manganese oxide synthesized from spent Zn-C battery for supercapacitor electrode application

“…It was observed that Mn 2p peak consists of two main spin−orbital lines with binding energies at ~641.65 and 653.4 eV which are attributed to Mn 2p 3/2 and Mn 2p 1/2 respectively. The observed difference of binding energy value of ~11.75 eV between the spin-orbit splitting of Mn 2p 3/2 and Mn 2p 1/2 levels and their position are in agreement with the reported value for Mn 3 O 4 in literature 37,40,41 . The highest O1s A peak was observed at 529.7 eV and attributed to the Mn-O and O1s B peak observed at 531.08 eV can be attributed to loosely bonded Mn-OH either due to oxidation or water or adventitious contamination 42 .…”

Selective Oxidation of Biomass-Derived Alcohols and Aromatic and Aliphatic Alcohols to Aldehydes with O2/Air Using a RuO2-Supported Mn3O4 Catalyst

“…59 Two well-resolved doublets centered at 653.53 and 641.81 eV corresponding to Mn 2p 1/2 and Mn 2p 3/2 , respectively, were observed in the high-resolution XPS spectrum of Mn 2p, confirming the presence of Mn 2+ and Mn 3+ species in Mn 3 O 4 (Figure 6f). 60 The spin–orbit splitting value (Δ E ) between the two doublets was 11.74 eV that matched well with the reported value of Mn 3 O 4 . 60…”

“…60 The spin–orbit splitting value (Δ E ) between the two doublets was 11.74 eV that matched well with the reported value of Mn 3 O 4 . 60…”

Strong Enhancement of deSoot Activity of Transition Metal Oxides by Alkali Doping: Additive Effects of Potassium and Nitric Oxide

“…Where possible the symmetry was assigned based on the supporting literature. The Mn 3 O 4 spectra showed six visible bands: 175, 289, 318, 374, 477, and 658 cm -1 [41]. Bands at 186, 285, 393, 479, 514, 582, 639 and 750 cm -1 were visible on the cryptomelane spectra [42].…”