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Journal Articles

Observation of anisotropic magneto-Peltier effect in nickel

Uchida, Kenichi*; Daimon, Shunsuke*; Iguchi, Ryo*; Saito, Eiji

Nature, 558(7708), p.95 - 99, 2018/06

 Times Cited Count:25 Percentile:8(Multidisciplinary Sciences)

Journal Articles

Numerical simulation of hydrogen thermal desorption profile under assumption of two kinds of trap sites for tempered martensitic steel

Tsuchida, Yutaka*; Ebihara, Kenichi

Tetsu To Hagane, 103(11), p.653 - 659, 2017/11

 Times Cited Count:1 Percentile:87.3(Metallurgy & Metallurgical Engineering)

A single peak in thermal desorption profiles of hydrogen, which are measured in low-temperature thermal desorption spectrometry (L-TDS) for a very thin plate specimen of tempered martensitic steel, was reproduced successfully by the superposition of two Gaussian distributions. Then, the parameters concerning the detrapping rate constants for both peaks, which are trap energy and pre-exponential factor, were calculated using the Choo-Lee plot. We confirmed that Kissinger model incorporating the obtained parameters could simulate the two peaks. In addition, we reproduced the single peak well using the reaction-diffusion equation incorporating the obtained parameters and the appropriate trap site concentration. From the results, we interpreted that the one peak corresponds to dislocation and the other to grain-boundary.

Journal Articles

Thermographic measurements of the spin Peltier effect in metal/yttrium-iron-garnet junction systems

Daimon, Shunsuke*; Uchida, Kenichi*; Iguchi, Ryo*; Hioki, Tomosato*; Saito, Eiji

Physical Review B, 96(2), p.024424_1 - 024424_12, 2017/07

 Times Cited Count:17 Percentile:19.82(Materials Science, Multidisciplinary)

Journal Articles

Time-resolved study of field-induced suppression of longitudinal spin Seebeck effect

Hioki, Tomosato*; Iguchi, Ryo*; Qiu, Z.*; Hou, D.*; Uchida, Kenichi*; Saito, Eiji

Applied Physics Express, 10(7), p.073002_1 - 073002_4, 2017/06

 Times Cited Count:9 Percentile:36.54(Physics, Applied)

Journal Articles

Detection of induced paramagnetic moments in Pt on Y$$_{3}$$Fe$$_{5}$$O$$_{12}$$ via X-ray magnetic circular dichroism

Kikkawa, Takashi*; Suzuki, Motohiro*; Okabayashi, Jun*; Uchida, Kenichi*; Kikuchi, Daisuke*; Qiu, Z.*; Saito, Eiji

Physical Review B, 95(21), p.214416_1 - 214416_7, 2017/06

 Times Cited Count:6 Percentile:55.89(Materials Science, Multidisciplinary)

Journal Articles

Temperature dependence of the spin Seebeck effect in [Fe$$_{3}$$O$$_{4}$$/Pt]n multilayers

Ramos, R.*; Kikkawa, Takashi*; Anad$'o$n, A.*; Lucas, I.*; Uchida, Kenichi*; Algarabel, P. A.*; Morell$'o$n, L.*; Aguirre, M. H.*; Saito, Eiji; Ibarra, M. R.*

AIP Advances (Internet), 7(5), p.055915_1 - 055915_7, 2017/05

 Times Cited Count:13 Percentile:25.14(Nanoscience & Nanotechnology)

Journal Articles

Concomitant enhancement of the longitudinal spin Seebeck effect and the thermal conductivity in a Pt/YIG/Pt system at low temperatures

Iguchi, Ryo*; Uchida, Kenichi*; Daimon, Shunsuke*; Saito, Eiji

Physical Review B, 95(17), p.174401_1 - 174401_7, 2017/05

 Times Cited Count:24 Percentile:11.87(Materials Science, Multidisciplinary)

Journal Articles

One-dimensional spinon spin currents

Hirobe, Daichi*; Sato, Masahiro*; Kawamata, Takayuki*; Shiomi, Yuki*; Uchida, Kenichi*; Iguchi, Ryo*; Koike, Yoji*; Maekawa, Sadamichi; Saito, Eiji

Nature Physics, 13(1), p.30 - 34, 2017/01

 Times Cited Count:45 Percentile:3.27(Physics, Multidisciplinary)

Journal Articles

Gamma radiation resistance of spin Seebeck devices

Yagmur, A.*; Uchida, Kenichi*; Ihara, Kazuki*; Ioka, Ikuo; Kikkawa, Takashi*; Ono, Madoka*; Endo, Junichi*; Kashiwagi, Kimiaki*; Nakashima, Tetsuya*; Kirihara, Akihiro*; et al.

Applied Physics Letters, 109(24), p.243902_1 - 243902_4, 2016/12

 Times Cited Count:1 Percentile:91.96(Physics, Applied)

Thermoelectric devices based on the spin Seebeck effect (SSE) were irradiated with gamma ($$gamma$$) rays with the total dose of around 3$$times$$10$$^{5}$$ Gy in order to investigate the $$gamma$$-radiation resistance of the devices. To demonstrate this, Pt/Ni$$_{0.2}$$Zn$$_{0.3}$$Fe$$_{2.5}$$O$$_{4}$$/Glass and Pt/Bi$$_{0.1}$$Y$$_{2.9}$$Fe$$_{5}$$O$$_{12}$$/Gd$$_{3}$$Ga$$_{5}$$O$$_{12}$$ SSE devices were used. We confirmed that the thermoelectric, magnetic, and structural properties of the SSE devices are not affected by the $$gamma$$-ray irradiation. This result demonstrates that SSE devices are applicable to thermoelectric generation even in high radiation environments.

Journal Articles

Thermal imaging of spin Peltier effect

Daimon, Shunsuke*; Iguchi, Ryo*; Hioki, Tomosato*; Saito, Eiji; Uchida, Kenichi*

Nature Communications (Internet), 7, p.13754_1 - 13754_7, 2016/12

 Times Cited Count:50 Percentile:6.2(Multidisciplinary Sciences)

Journal Articles

Magnon polarons in the spin Seebeck effect

Kikkawa, Takashi*; Shen, K.*; Flebus, B.*; Duine, R. A.*; Uchida, Kenichi*; Qiu, Z.*; Bauer, G. E. W.*; Saito, Eiji

Physical Review Letters, 117(20), p.207203_1 - 207203_6, 2016/11

 Times Cited Count:58 Percentile:3.98(Physics, Multidisciplinary)

Journal Articles

Thermoelectric generation based on spin Seebeck effects

Uchida, Kenichi*; Adachi, Hiroto; Kikkawa, Takashi*; Kirihara, Akihiro*; Ishida, Masahiko*; Yorozu, Shinichi*; Maekawa, Sadamichi; Saito, Eiji*

Proceedings of the IEEE, 104(10), p.1946 - 1973, 2016/10

 Times Cited Count:117 Percentile:0.7(Engineering, Electrical & Electronic)

Journal Articles

Spin-current probe for phase transition in an insulator

Qiu, Z.*; Li, J.*; Hou, D.*; Arenholz, E.*; N'Diaye, A. T.*; Tan, A.*; Uchida, Kenichi*; Sato, Koji*; Okamoto, Satoshi*; Tserkovnyak, Y.*; et al.

Nature Communications (Internet), 7, p.12670_1 - 12670_6, 2016/08

 Times Cited Count:86 Percentile:2.61(Multidisciplinary Sciences)

Journal Articles

Observation of temperature-gradient-induced magnetization

Hou, D.*; Qiu, Z.*; Iguchi, Ryo*; Sato, Koji*; Vehstedt, E. K.*; Uchida, Kenichi*; Bauer, G. E. W.*; Saito, Eiji

Nature Communications (Internet), 7, p.12265_1 - 12265_6, 2016/07

 Times Cited Count:10 Percentile:29.59(Multidisciplinary Sciences)

Journal Articles

Spin-current-driven thermoelectric generation based on interfacial spin-orbit coupling

Yagmur, A.*; Karube, Shutaro*; Uchida, Kenichi*; Kondo, Kota*; Iguchi, Ryo*; Kikkawa, Takashi*; Otani, Yoshichika*; Saito, Eiji

Applied Physics Letters, 108(24), p.242409_1 - 242409_4, 2016/06

 Times Cited Count:1 Percentile:91.96(Physics, Applied)

Journal Articles

Complete suppression of longitudinal spin Seebeck effect by frozen magnetization dynamics in Y$$_{3}$$Fe$$_{5}$$O$$_{12}$$

Kikkawa, Takashi*; Uchida, Kenichi*; Daimon, Shunsuke*; Saito, Eiji

Journal of the Physical Society of Japan, 85(6), p.065003_1 - 065003_2, 2016/06

 Times Cited Count:6 Percentile:42.98(Physics, Multidisciplinary)

Journal Articles

Flexible heat-flow sensing sheets based on the longitudinal spin Seebeck effect using one-dimensional spin-current conducting films

Kirihara, Akihiro*; Kondo, Koichi*; Ishida, Masahiko*; Ihara, Kazuki*; Iwasaki, Yuma*; Someya, Hiroko*; Matsuba, Asuka*; Uchida, Kenichi*; Saito, Eiji; Yamamoto, Naoharu*; et al.

Scientific Reports (Internet), 6, p.23114_1 - 23114_7, 2016/03

 Times Cited Count:41 Percentile:7.95(Multidisciplinary Sciences)

Heat-flow sensing is expected to be an important technological component of smart thermal management in the future. Conventionally, the thermoelectric (TE) conversion technique, which is based on the Seebeck effect, has been used to measure a heat flow by converting the flow into electric voltage. However, for ubiquitous heat-flow visualization, thin and flexible sensors with extremely low thermal resistance are highly desired. Recently, another type of TE effect, the longitudinal spin Seebeck effect (LSSE), has aroused great interest because the LSSE potentially offers favourable features for TE applications such as simple thin-film device structures. Here we demonstrate an LSSE-based flexible TE sheet that is especially suitable for a heat-flow sensing application. This TE sheet contained a Ni$$_{0.2}$$Zn$$_{0.3}$$Fe$$_{2.5}$$O$$_4$$ film which was formed on a flexible plastic sheet using a spray-coating method known as ferrite plating. The experimental results suggest that the ferrite-plated film, which has a columnar crystal structure aligned perpendicular to the film plane, functions as a unique one-dimensional spin- current conductor suitable for bendable LSSE-based sensors. This newly developed thin TE sheet may be attached to differently shaped heat sources without obstructing an innate heat flux, paving the way to versatile heat-flow measurements and management.

Journal Articles

Unconventional scaling and significant enhancement of the spin Seebeck effect in multilayers

Ramos, R.*; Kikkawa, Takashi*; Aguirre, M.*; Lucas, I.*; Anad$'o$n, A.*; Oyake, Takafumi*; Uchida, Kenichi*; Adachi, Hiroto; Shiomi, Junichiro*; Algarabel, P. A.*; et al.

Physical Review B, 92(22), p.220407_1 - 220407_5, 2015/12

 Times Cited Count:48 Percentile:8.17(Materials Science, Multidisciplinary)

Journal Articles

Enhancement of anomalous Nernst effects in metallic multilayers free from proximity-induced magnetism

Uchida, Kenichi*; Kikkawa, Takashi*; Seki, Takeshi*; Oyake, Takafumi*; Shiomi, Junichiro*; Qiu, Z.*; Takanashi, Koki*; Saito, Eiji

Physical Review B, 92(9), p.094414_1 - 094414_6, 2015/09

 Times Cited Count:46 Percentile:8.44(Materials Science, Multidisciplinary)

Journal Articles

All-oxide spin Seebeck effects

Qiu, Z.*; Hou, D.*; Kikkawa, Takashi*; Uchida, Kenichi*; Saito, Eiji

Applied Physics Express, 8(8), p.083001_1 - 083001_3, 2015/08

 Times Cited Count:19 Percentile:25.51(Physics, Applied)

74 (Records 1-20 displayed on this page)