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Preparation, phase stability, and magnetization behavior of high entropy hexaferrites

Zhivulin VE 1 , Trofimov EA 1 , Zaitseva OV 1 , Sherstyuk DP 1 , Cherkasova NA 1 , Taskaev SV 2 Show all authors , Vinnik DA 1 , Alekhina YA 3 , Perov NS 3 , Naidu KCB 4 , Elsaeedy HI 5 , Khandaker MU 6 , Tishkevich DI 7 , Zubar TI 7 , Trukhanov AV 7 , Trukhanov SV 7

Affiliations 

  • 1 South Ural State University, 76, Lenin Avenue, Chelyabinsk 454080, Russia
  • 2 Chelyabinsk State University, 129, Bratiev Kashirinykh St, Chelyabinsk 454001, Russia
  • 3 Magnetism Department, Faculty of Physics, Lomonosov Moscow State University, Leninskie Gory 1-2, Moscow 119991, Russia
  • 4 Gitam School of Science, Gitam Deemed to be University Bangalore Campus, Bangalore, Karnataka 562163, India
  • 5 Department of Physics, Faculty of Science, King Khalid University, P.O. Box 9004, Abha, Saudi Arabia
  • 6 Centre for Applied Physics and Radiation Technologies, School of Engineering and Technology, Sunway University, Bandar Sunway, Selangor 47500, Malaysia
  • 7 Laboratory of Magnetic Films Physics, SSPA "Scientific and Practical Materials Research Centre of NAS of Belarus", 19, P. Brovki St, Minsk 220072, Belarus
iScience, 2023 Jul 21;26(7):107077.
PMID: 37485374 DOI: 10.1016/j.isci.2023.107077

Abstract

The polycrystalline SrFe12O19 samples deeply substituted up to at.67% by Al3+, Ga3+, In3+, Co3+, and Cr3+ cations with a high configurational mixing entropy were prepared by solid-phase synthesis. Phase purity and unit cell parameters were obtained from XRD and analyzed versus the average ionic radius of the iron sublattice. The crystallite size varied around ∼4.5 μm. A comprehensive study of the magnetization was realized in various fields and temperatures. The saturation magnetization was calculated using the Law of Approach to Saturation. The accompanying magnetic parameters were determined. The magnetic crystallographic anisotropy coefficient and the anisotropy field were calculated. All investigated magnetization curves turned out to be nonmonotonic. The magnetic ordering and freezing temperatures were extracted from the ZFC and FC curves. The average size of magnetic clusters varied around ∼350 nm. The high values of the configurational mixing entropy and the phenomenon of magnetic dilution were taken into account.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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