Magneto‐Optical Properties of Materials Containing Divalent Europium

Autor:	M. J. Freiser, B. E. Argyle, J. C. Suits
Rok vydání:	1966
Předmět:	chemistry.chemical_classification Materials science Birefringence Inorganic chemistry Analytical chemistry General Physics and Astronomy chemistry.chemical_element Fluorite Divalent Ion chemistry Absorption edge Orthorhombic crystal system Material properties Europium
Zdroj:	Journal of Applied Physics. 37:1391-1397
ISSN:	1089-7550 0021-8979
DOI:	10.1063/1.1708486
Popis:	A variety of relatively transparent materials containing Eu+ + have become available, thus enabling a study to be made of the magneto‐optical properties of the Eu+ + ion in widely different environments. The following materials are reviewed: Eu2SiO4 (orthorhombic structure with a ferromagneticCurie temperatureTc of 7°K), dilute Eu+ + in CaF2(fluorite structure), EuF2(fluorite structure, Tc ≈0), EuO−Al2O3−B2O3glasses (Tc =0), EuSe (NaCl structure, Tc =7°K), and EuO (NaCl structure, Tc =69°K). We discuss the magneto‐optical properties of the ``nonmagnetic'' materials (CaF2: Eu+ +, EuF2, Eu glasses) in terms of an intra‐atomic 4f 7→4f 65dtransition. Using this transition, calculation of the Faraday and Cotton‐Mouton birefringence in EuF2 gives reasonable agreement with experiment. The magneto‐optical properties of the ``magnetic materials'' (Eu chalcogenides) are discussed in terms of an interatomic (4f 7) (4f 7) → (4f 6) (4f 75d) transition. This transition gives reasonable agreement with the observed magnitudes of the magnetic absorption edge shifts in EuSe and EuO.
Databáze:	OpenAIRE
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