Search Results:　 1-20 of 1584

Zhong Yu-Jie , Hu Chong-Der

… We calculate the self-energy and dispersion relation of magnons in the spiral spin state of SrFeO3. … Finally the self-energy and the dispersion of magnons are calculated and they give a linear relation between frequency and wavevector. …

J Phys Soc Jpn 82(1), 014704-014704-10, 2013-01-15

The Japan Society of Applied Physics

Kuroda Noritaka , Tsugawa Koichi , Yokoi Hiroyuki

… The properties of refraction of extraordinary rays at principal surfaces of a uniaxial crystal having a strongly anisotropic dielectric dispersion are studied. … It turns out that the damping of phonons gives rise to a true negative refraction that the two vectors are simultaneously refracted or deflected negatively in a certain frequency range. …

J Phys Soc Jpn 81(11), 114706-114706-10, 2012-11-15

The Physical Society of Japan

Okamoto Satoshi , Kikuchi Nobuaki , Furuta Masaki , Kitakami Osamu , Shimatsu Takehito

… Moreover, the broad dispersion of the switching field in the absence the of rf field also becomes quite narrow. …

Applied Physics Express 5(9), 093005-093005-3, 2012-09-25

The Japan Society of Applied Physics

Hidayah Nur , Yasuda Naohiko , Ohwa Hidehiro , Tachi Yoshihito , Yamashita Yohachi , Iwata Makoto

… An RE-type dielectric dispersion with a weak frequency (f) dependence was observed. … Such a dielectric dispersion in the RE state was found to be based on tweed domain structures observed by polarization light microscopy (PLM) and piezoelectric force microscopy (PFM) due to the competition between the antiferroelectric (AFE) and FE coupling in the RE state. …

Jpn J Appl Phys 51(9), 09LC06-09LC06-5, 2012-09-25

The Japan Society of Applied Physics

Hinokihara Taichi , Miyake Kazumasa

… By extending the method of Pines and Bohm for plasma oscillations, the eigen frequency of the Heisenberg equation of motion for the collective mode is obtained. … The dispersion shows anisotropic behavior in the \mbi{k}-space in such a manner that the gap of the dispersion becomes zero when \mbi{k} is perpendicular to the direction of the guest ion's motion. … The effect of screening the collective mode dispersion due to conduction electrons is shown to be almost irrelevant. …

J Phys Soc Jpn 81(8), 084603-084603-7, 2012-08-15

The Physical Society of Japan

ISHII Masashi , TOWLSON Brian , HARAKO Susumu , ZHAO Xin-Wei , KOMURO Shuji , HAMILTON Bruce

… Photo-excited dielectric relaxation (PEDR) technique, namely frequency dispersion measurement of complex impedance under excitation light, and the selective injection revealed that the Sm excitation was induced by an electron trapping with a slow response of ∼12 Hz and following recombination with holes in host TiO2 with ∼950 Hz. …

IEEJ Transactions on Electronics, Information and Systems 132(8), 1255-1260, 2012-08-01

J-STAGE CrossRef References (13)

Hara Motoaki , Kuwano Hiroki

… We examined the suppression of spurious responses beneath the resonant frequency in an aluminum-nitride-based thin-film bulk acoustic resonator (FBAR) by a two-dimensional (2D) finite element method (FEM) and dispersion analysis of waves. …

Jpn J Appl Phys 51(7), 07GC11-07GC11-5, 2012-07-25

The Japan Society of Applied Physics

Hsu Jin-Chen

… A numerical study of switchable frequency band gaps in two-dimensional phononic crystal (PnC) slabs consisting of piezoelectric inclusions in an isotropic matrix is presented. … Instead of changing the geometry or orientation of the PnC units or inclusions, electrical boundary conditions are used to actively control the frequency band gaps. …

Jpn J Appl Phys 51(7), 07GA04-07GA04-5, 2012-07-25

The Japan Society of Applied Physics

東田 豊 , 伊岐見 大輔 , 野村 英生

マテリアルインテグレーション 25(6), 39-44, 2012-06-00

Ano Genki , Akatsu Mitsuhiro , Araki Koji , Matsuo Kazuo , Tachikawa Yoshiaki , Mitsumoto Keisuke , Yamaguchi Takashi , Nemoto Yuichi , Goto Terutaka , Takeda Naoya , Dönni Andreas , Kitazawa Hideaki

… Furthermore, for the elastic constant C_{44} and the attenuation coefficient \alpha_{44} we found a frequency dependence at two different temperatures of 15 and 25 K, which we describe in terms of the Debye-type dispersion with an Arrhenius-type relaxation time \tau = \tau_{0}\exp(E/k_{\text{B}} T) for two different activation energies of E_{\text{L}} = 102 K and E_{\text{H}} = 198 K. …

J Phys Soc Jpn 81(3), 034710-034710-11, 2012-03-15

The Physical Society of Japan