Surface and EB effects in core/shell and hollow NPs: compiliation

Impacts of surface spins and inter-particle interactions on the magnetism of hollow γ-Fe₂O₃ nanoparticles.

Hafsa Khurshid, Zohreh Nemati Porshokouh, Manh-Huong Phan, Pritish Mukherjee, and Hariharan Srikanth

J. Appl. Phys. 115, 17E131 (2014)

Temperature dependence of ZFC and FC magnetization taken in a field of 50 Oe for (a) 10 nm and (b) 15 nm hollow particles.

Tuning exchange bias in Fe/γ-Fe₂O₃ core-shell nanoparticles: Impacts of interface and surface spins.

Hafsa Khurshid, Manh-Huong Phan, Pritish Mukherjee, and Hariharan Srikanth

Appl. Phys. Lett. 104, 072407 (2014) 

Temperature dependence of the net moment of frozen spins ( M f ) for (a) 15 nm, (b) 10 nm, and (c) 8 nm Fe/γ-Fe 2O 3 nanoparticles. H EB and M f are plotted as a function of particle size (d).

Mechanism and controlled growth of shape and size variant core/shell FeO/Fe3O4 nanoparticles.
Hafsa Khurshid, Wanfeng Li, Sayan Chandra, Manh-Huong Phan, George C. Hadjipanayis, Pritish Mukherjee and Hariharan Srikanth

Nanoscale 5, 7942 (2013) 

Hysteresis loops (M–H) measured in the ZFC and FC protocols for cubic, spherical, and octopod-shaped FeO/Fe₃O₄ nanoparticles. The inset of (a) shows an enlarged portion of the M–H curves featuring the low-field jump in the FC magnetization of the cubic nanoparticles. This feature is less pronounced in the case of the octopod-shaped nanoparticles (c) and is almost absent in the case of the spherical nanoparticles (b).

Asymmetric hysteresis loops and its dependence on magnetic anisotropy in exchange biased Co/CoO core-shell nanoparticles.

Sayan Chandra, Hafsa Khurshid, Manh-Huong Phan and Hariharan Srikanth

Appl. Phys. Lett. 101, 232405 (2012)

(a) Temperature dependence of exchange bias field for cooling field of 1 T and (b) temperature dependence of isothermal remanence. Insets in (a) show the ZFC and FC hysteresis loops at 10 K and 100 K. Inset in (b)shows the temperature dependence of blocking function distribution.

Surface spin disorder and exchange-bias in hollow maghemite nanoparticles.

Hafsa Khurshid, Wanfeng Li, Manh-Huong Phan, Pritish Mukherjee, George C. Hadjipanayis and Hariharan Srikanth

Appl. Phys. Lett. 101, 022403 (2012)

The FC M( H) loops taken at 5 K for (a) 9.2 nm and (b) 18.7 nm hollow nanoparticles. The TEM image of the 18.5 nm solid nanoparticles is shown in the inset of (b).