Remarkable magneto-optical properties of europium selenide nanoparticles with wide energy gaps.
The enhanced magneto-optical properties of nanoscaled lanthanide chalogenide semiconductors which have a wide energy gap were observed at around 500 nm for the first time. The nanoscaled semiconductors, Eu(1-x)Se nanoparticles 1 (cubic shapes) and 2 (spherical shapes), were synthesized by the thermal reduction of Eu(III) ion with organic ligands containing Se atoms. The resulting Eu(1-x)Se nanoparticles were characterized by X-ray diffraction, high-resolution transmission electron microscopy, energy dispersive X-ray spectroscopy, superconducting quantum interference devices magnetometer, and microwave induced plasma atomic emission spectroscopy measurements. The particle grain sizes of 1 and 2 were estimated to be 11 and 20 nm, respectively. The concentration-normalized Veldet constants (the magnitude of the Faraday effect) of Eu(1-x)Se nanoparticles were much larger than those of corresponding bulk EuSe and EuS nanoparticles.
Hasegawa
Yasuchika
Y
Graduate School of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama-cho, Ikoma, Nara 630-0192, Japan. hasegawa@ms.naist.jp
Adachi
Taka-aki
TA
Tanaka
Atsushi
A
Afzaal
Mohammad
M
O'Brien
Paul
P
Doi
Takahiro
T
Hinatsu
Yukio
Y
Fujita
Koji
K
Tanaka
Katsuhisa
K
Kawai
Tsuyoshi
T