Magnetic study of M-type Ru–Ti doped strontium hexaferrite nanocrystalline particles

Journal Article · Sun Nov 01 00:00:00 EDT 2015 · Journal of Alloys and Compounds

DOI:https://doi.org/10.1016/j.jallcom.2015.06.274· OSTI ID:1352868

Alsmadi, A. M.; Bsoul, I.; Mahmood, S. H.; Alnawashi, G.; Al-Dweri, F. M.; Maswadeh, Y.; Welp, U.

We carried out a systematic study on the effect of the substitution of Ti2+ and Ru4+ ions for Fe3+ ions on the structural and magnetic properties of the strontium ferrite SrFe12-2xRuxTixO19 nanoparticles with (0 <= x <= 0: 3), using x-ray diffraction, Quantum Design PPMS-9 magnetometry, and electrical resistivity. A clear irreversibility between the zero-field-cooled and field-cooled curves was observed below room temperature and the zero-field-cooled magnetization curves displayed a broad peak at a temperature TM. These results were discussed within the framework of random particle assembly model and associated with the magnetic domain wall motion. The resistivity data showed some kind of a transition from insulator to perfect insulator around TM. The high-temperature magnetization measurements exhibited sharp peaks just below T-c indicating a superparamagnetic behavior. With Ru-Ti substitution, the saturation magnetization at 5 K showed small variations were it slightly increased with increasing x up to 0.2, and then decrease for x = 0.3, while the coercivity decreased monotonically, recording a reduction of about 78% at x = 0.3. These results were discussed in light of the cationic distributions based on the results of the structural refinements.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science - Office of Basic Energy Sciences - Materials Sciences and Engineering Division
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 1352868
• Journal Information: Journal of Alloys and Compounds, Vol. 648; ISSN 0925-8388
• Publisher: Elsevier
• Country of Publication: United States
• Language: English