Synthesis and magnetic characterization of Sr-based Ni{sub 2}X-type hexaferrite

Journal Article · Thu Oct 15 04:00:00 EDT 2015 · AIP Advances

DOI:https://doi.org/10.1063/1.4934792· OSTI ID:22492138

Mashiko, T.; Kakizaki, K.; Sakai, M. ^[1]; Watanabe, K. ^[2]; Abe, H. ^[3]

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1. Graduate School of Science and Engineering, Saitama University, 255 Shimo-Okubo, Saitama 338-8570 (Japan)
2. Biomolecular Characterization Unit, Center of Sustainable Resource Science, RIKEN, 2-1 Wako, Saitama 351-0198 (Japan)
3. Advanced Electronic Materials Center, National Institute of Materials Science, 1-1 Namiki, Tsukuba 305-0044 (Japan)

We have investigated the synthesis conditions, and the magnetic properties of the Sr{sub 2}Ni{sub 2}X-type hexagonal ferrite, Sr{sub 2}Ni{sub 2}Fe{sub 28}O{sub 46}. The Sr{sub 2}Ni{sub 2}X-type hexaferrite was synthesized at 1240{sup ∘}C. The spontaneous magnetization at 5 K was 44.2 μ{sub B}/f.u., suggesting that most of the Ni{sup 2+} ions are at the up-spin octahedral sites in the spinel-structure blocks within the model of a Néel-type collinear ferrimagnetic structure. The Curie temperature of the Sr{sub 2}Ni{sub 2}X-type hexaferrite was estimated to be T{sub C}[Sr{sub 2}Ni{sub 2}X] = 472{sup ∘}C. This is consistent with the difference of the block stacking structures of SrM-type, Sr{sub 2}Ni{sub 2}X-type, SrNi{sub 2}W-type, and nickel spinel ferrites.

• OSTI ID: 22492138
• Journal Information: AIP Advances, Journal Name: AIP Advances Journal Issue: 10 Vol. 5; ISSN AAIDBI; ISSN 2158-3226
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CALIBRATION STANDARDS
CURIE POINT
FERRITES
HEXAGONAL LATTICES
MAGNETIC PROPERTIES
MAGNETIZATION
NICKEL COMPOUNDS
NICKEL IONS
SPIN
SPINELS
STRONTIUM COMPOUNDS
SYNTHESIS
TEMPERATURE DEPENDENCE