Paramagnetic Faraday Rotation of EuSe
作者:
J. C. Suits,
B. E. Argyle,
期刊:
Journal of Applied Physics
(AIP Available online 1965)
卷期:
Volume 36,
issue 3
页码: 1251-1252
ISSN:0021-8979
年代: 1965
DOI:10.1063/1.1714192
出版商: AIP
数据来源: AIP
摘要:
Faraday rotation and absorption measurements were made on a bulk single crystal and on evaporated polycrystalline films of EuSe. Bulk EuSe is ferromagnetic, transparent in the red, and exhibits an unusually large Verdet constant at room temperature: −9.7 min/Oe‐cm at 6660 Å where the absorption is 173 cm−1. Measurements at 77°K show that the Verdet constant varies approximately inversely with temperature and thereby correlates with the magnetic susceptibility. These properties are due to the Eu+ +ion and are comparable to those we have observed in other divalent europium compounds such as Eu2SiO4.The evaporated films of EuSe exhibit a broad but well‐defined absorption band at 4600 Å which is essentially duplicated in similarly prepared films of EuS and EuO at 5200 and 5800 Å, respectively. The wavelength dependence of the Faraday rotation of EuSe exhibits a rather complicated structure with two sign reversals in the region of the absorption band. At 6660 Å the Verdet constant measured at room temperature is −6.3 min/Oe‐cm agreeing in sign and approximately in magnitude with the bulk value, whereas the maximum value of Verdet constant, +25 min/Oe‐cm, occurs at 4330 Å.
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