Mössbauer Studies of the Structure of Core/Shell Fe{sub 3}O{sub 4}/γ-Fe{sub 2}O{sub 3} Nanoparticles

Journal Article · Wed May 15 00:00:00 EDT 2019 · Technical Physics Letters

DOI:https://doi.org/10.1134/S1063785019050079· OSTI ID:22929271

Obaidat, I. M. ^[1]; Valliulin, A. A. ^[2]; Semenov, V. G. ^[3]; Al-Omari, I. A. ^[4]; Nayek, C. ^[1]

---

1. Department of Physics, United Arab Emirates University (United Arab Emirates)
2. Kazan Federal University (Russian Federation)
3. St. Petersburg State University (Russian Federation)
4. Department of Physics, Sultan Qaboos University (Oman)

The phase composition, the structure of cores and shells, and the dependences of the shell thickness on the fabrication technique were determined by Mössbauer spectroscopy for core/shell Fe{sub 3}O{sub 4}/γ-Fe{sub 2}O{sub 3} magnetic nanoparticles (MNPs) with Fe{sub 3}O{sub 4} cores of a fixed size (8 nm) and γ-Fe{sub 2}O{sub 3} shells of a varying thickness (1, 3, or 5 nm). A layer on the MNP surface with a magnetic state differing from that in the bulk was found. It was also found that a spin-glass state probably exists between the core and the shell. The studied core/shell Fe{sub 3}O{sub 4}/γ-Fe{sub 2}O{sub 3} MNPs have promising applications in various fields (e.g., biomedicine).

• OSTI ID: 22929271
• Journal Information: Technical Physics Letters, Journal Name: Technical Physics Letters Journal Issue: 5 Vol. 45; ISSN 1063-7850
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
FABRICATION
IRON OXIDES
MAGNETIC MATERIALS
MOESSBAUER SPECTROMETERS
NANOPARTICLES
SPIN GLASS STATE
THICKNESS