Investigation of orbital magnetization in inverse spinel cobalt ferrite using magnetic Compton scattering

Abstract

We present the spin momentum densities of CoFe2O4 measured at 8 and 300 K using magnetic Compton scattering. The magnetic Compton profiles were decomposed into component profiles of constituents namely Fe and Co, to determine their role in the formation of total spin moment. It is seen that the major contribution (about 80%) in the spin moment is from Co, whereas the itinerant electrons show a small reverse polarization. Moreover, it is clearly visualized that the spin moment at Co reduces from 2.55 → 2.35 μB/f.u. while going from 8 → 300 K. The magnetic Compton profiles, when compared with the magnetization data, show about 17% contribution of orbital moment to the total magnetic moment at both temperatures. The origin of the orbital moment is explained on the basis of rotation of hole on t2g orbital of Co+2 ion.

Investigation of pressure-induced magnetic transitions in CoxFe3−xO4Subı́as1, Cuartero2, Garcı́a3 et al. 2013Phys. Rev. B314160View full textAdd to dashboardCite

“…However, a small contribution of Fe is still deduced from magnetic Compton scattering. 35 This fact is reflected in the amplitude of the XMCD signals at the Fe (Fig. 5) and Co (Fig.…”

Microstructure, AC impedance and DC electrical conductivity characteristics of NiFe2-xGdxO4 (x = 0, 0.05 and 0.075)

“…[12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31] However, the efforts towards understanding the effect of the substitution of rare earth (R) ions in spinel oxides are meager. Engineering the materials and development of devices for high frequency applications based on nickel ferrites is clearly dependent upon the fundamental knowledge of electrical behavior of these materials.…”

Study of spin and orbital magnetization in Dy- and Gd-doped Co ferrite using magnetic Compton scattering

“…4, it is clear that the difference between VSM and limited MCP data (8 and 300 K) is almost identical which depicts a similar amplitude of orbital moments in CFDO and CFGO at 2.5 T. Table I (at 8 K) in CFDO and CFGO, respectively, which is close to our earlier investigations on the parent compound CFO (0.58 6 0.03 l B /f.u.). 9 Data at 100 and 200 K (Fig. 4), which are not analyzed due to limited accuracy, also show a consistent trend.…”

“…9 The structure and phase purity of the compounds were authenticated by powder X-ray diffraction (XRD) using the Cu-Ka radiation at room temperature. Energy dispersive x-ray analysis was used to confirm the metallic compositions in samples.…”