A strong magneto-optical activity in rare-earth La{sup 3+} substituted M-type strontium ferrites

Journal Article · Wed Jun 01 04:00:00 EDT 2011 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3587181· OSTI ID:21538414

Feng, Hu; Xiansong, Liu; Deru, Zhu ^[1]; Fernandez-Garcia, Lucia; Suarez, Marta; Luis Menendez, Jose ^[2]

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1. Engineering Technology Research Center of Magnetic Materials, Anhui Province, School of Physics and Materials Science, Anhui University, Hefei 230039 (China)
2. Centro de Investigacion en Nanomateriales y Nanotecnologia (CINN), Consejo Superior de Investigaciones Cientificas (CSIC) - Universidad de Oviedo - UO - Principado de Asturias, Parque Tecnologico de Asturias, 33428 Llanera, Asturias (Spain)

M-type strontium ferrites with substitution of Sr{sup 2+} by rare-earth La{sup 3+} were prepared by conventional ceramic technology. The structure, magnetic properties, and magneto-optical Kerr activity of Sr{sub 1-x}La{sub x}Fe{sub 12}O{sub 19} (x = 0, 0.05, 0.10, 0.15, 0.20) were investigated by x-ray diffraction (XRD), vibrating sample magnetometer (VSM), and magneto-optical ellipsometry, respectively. X-ray diffraction showed that the samples sintered at 1290 deg. C for 3 h were single M-type hexagonal ferrites. The magnetic properties were remarkably changed due to the valence change of Fe ions induced by the substitution of La ions. Most significantly, an important magneto-optical activity was induced in the La{sup 3+} substituted M-type strontium ferrites around 3 eV.

• OSTI ID: 21538414
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 11 Vol. 109; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
CERAMICS
CHARGED PARTICLES
COERCIVE FORCE
COHERENT SCATTERING
DIFFRACTION
ELEMENTS
ELLIPSOMETRY
FABRICATION
FERRIMAGNETIC MATERIALS
FERRITES
IONS
IRON COMPOUNDS
LANTHANUM ADDITIONS
LANTHANUM ALLOYS
LANTHANUM IONS
MAGNETIC MATERIALS
MAGNETIC PROPERTIES
MAGNETO-OPTICAL EFFECTS
MAGNETOMETERS
MATERIALS
MEASURING INSTRUMENTS
MEASURING METHODS
METALS
OPTICAL ACTIVITY
OPTICAL PROPERTIES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH ADDITIONS
RARE EARTH ALLOYS
RARE EARTHS
SCATTERING
SINTERING
STRONTIUM COMPOUNDS
STRONTIUM IONS
TRANSITION ELEMENT COMPOUNDS
VALENCE
VIBRATING SAMPLE MAGNETOMETERS
X-RAY DIFFRACTION