Zobrazeno 1 - 10
of 223
pro vyhledávání: '"Iguchi, Ryo"'
In this study, we report on a direct measurement method for the electrocaloric effect, the heating/cooling upon application/removal of an electric field in dielectric materials, based on a lock-in thermography technique. By use of sinusoidal excitati
Externí odkaz:
http://arxiv.org/abs/2209.05385
Autor:
Takahagi, Atsushi, Hirai, Takamasa, Iguchi, Ryo, Nakagawara, Keita, Nagano, Hosei, Uchida, Ken-ichi
Publikováno v:
Applied Physics Express 15, 063002 (2022)
The temperature and yttrium-iron-garnet (YIG) thickness dependences of the spin Peltier effect (SPE) have been investigated using a Pt/YIG junction system at temperatures ranging from room temperature to the Curie temperature of YIG by the lock-in th
Externí odkaz:
http://arxiv.org/abs/2204.05482
Autor:
Mizuno, Hayato, Modak, Rajkumar, Hirai, Takamasa, Takahagi, Atsushi, Sakuraba, Yuya, Iguchi, Ryo, Uchida, Ken-ichi
Publikováno v:
Applied Physics Letters 120, 202401 (2022)
We have characterized Co$_2$MnGa (CMG) Heusler alloy films grown on Y$_3$Fe$_5$O$_{12}$ (YIG) and Gd$_3$Ga$_5$O$_{12}$ (GGG) substrates at different deposition temperatures and investigated thermo-spin and magneto-thermoelectric conversion properties
Externí odkaz:
http://arxiv.org/abs/2203.10566
Publikováno v:
Japanese Journal of Applied Physics 2023
The Thomson effect induces heat release or absorption under the simultaneous application of a charge current and a temperature gradient to conductors. Here, we theoretically investigate the temperature profile due to the Thomson-effect-induced heat r
Externí odkaz:
http://arxiv.org/abs/2203.07631
We identify the bosonic excitations in ferroelectrics that carry electric dipoles from the phenomenological Landau-Ginzburg-Devonshire theory. The "ferron" quasi-particles emerge from the concerted action of anharmonicity and broken inversion symmetr
Externí odkaz:
http://arxiv.org/abs/2203.06367
Autor:
Modak, Rajkumar, Murata, Masayuki, Hou, Dazhi, Miura, Asuka, Iguchi, Ryo, Xu, Bin, Guo, Rulei, Shiomi, Junichiro, Sakuraba, Yuya, Uchida, Ken-ichi
Publikováno v:
Applied Physics Reviews, Volume 9, Issue 1, 011414 (2022)
The Seebeck and Peltier effects have been widely studied and used in various thermoelectric technologies, including thermal energy harvesting and solid-state heat pumps. However, basic and applied studies on the Thomson effect, another fundamental th
Externí odkaz:
http://arxiv.org/abs/2111.02707
Autor:
Uchida, Ken-ichi, Iguchi, Ryo
Publikováno v:
Journal of the Physical Society of Japan, Vol. 90, No. 12, p. 122001 (2021)
In spin caloritronics, a branch of spintronics, the spin degree of freedom is exploited for thermoelectric conversion and thermal transport. Since the inception of spin caloritronics, many experimental and theoretical studies have focused on clarifyi
Externí odkaz:
http://arxiv.org/abs/2111.02043
Magnons are the elementary excitations of the magnetic order that carry spin, momentum, and energy. Here we compare the magnon with the ferron, i.e. the elementary excitation of the electric dipolar order that transports polarization and heat in ferr
Externí odkaz:
http://arxiv.org/abs/2106.12775
We formulate a scattering theory of polarization and heat transport through a ballistic ferroelectric point contact. We predict a polarization current under either an electric field or a temperature difference that depends strongly on the direction o
Externí odkaz:
http://arxiv.org/abs/2105.14791
Publikováno v:
Science and Technology of Advanced Materials: Methods 1, 162-168 (2021)
We demonstrate a method for the simultaneous determination of the thermoelectric figure of merit of multiple martials by means of the lock-in thermography (LIT) technique. This method is based on the thermal analyses of the transient temperature dist
Externí odkaz:
http://arxiv.org/abs/2104.04173