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Journal Articles

Magnetic sensitivity distribution of Hall devices in antiferromagnetic switching experiments

Schreiber, F.*; Meer, H.*; Schmitt, C.*; Ramos, R.*; Saito, Eiji; Baldrati, L.*; Kl$"a$ui, M.*

Physical Review Applied (Internet), 16(6), p.064023_1 - 064023_9, 2021/12

https://doi.org/10.1103/PhysRevApplied.16.064023
 Times Cited Count：3 Percentile：26.56(Physics, Applied)

Journal Articles

Paramagnetic spin Hall magnetoresistance

Oyanagi, Koichi*; Gomez-Perez, J. M.*; Zhang, X.-P.*; Kikkawa, Takashi*; Chen, Y.*; Sagasta, E.*; Chuvilin, A.*; Hueso, L. E.*; Golovach, V. N.*; Sebastian Bergeret, F.*; et al.

Physical Review B, 104(13), p.134428_1 - 134428_14, 2021/10

https://doi.org/10.1103/PhysRevB.104.134428
 Times Cited Count：13 Percentile：78.56(Materials Science, Multidisciplinary)

Journal Articles

Spin Hall magnetoresistance in Pt/Cr$$_2$$O$$_3$$/YIG structure

Qi, J.*; Hou, D.*; Chen, Y.*; Saito, Eiji; Jin, X.*

Journal of Magnetism and Magnetic Materials, 534, p.167980_1 - 167980_6, 2021/09

https://doi.org/10.1016/j.jmmm.2021.167980
 Times Cited Count：1 Percentile：7.51(Materials Science, Multidisciplinary)

Journal Articles

Evaluation of edge domains in giant magnetoresistive junctions

Frost, W.*; Seki, Takeshi*; Kubota, Takahide*; Ramos, R.*; Saito, Eiji; Takanashi, Koki*; Hirohata, Atsufumi*

Applied Physics Letters, 118(17), p.172405_1 - 172405_5, 2021/04

https://doi.org/10.1063/5.0049315
 Times Cited Count：1 Percentile：7.45(Physics, Applied)

Journal Articles

Efficient spin torques in antiferromagnetic CoO/Pt quantified by comparing field- and current-induced switching

Baldrati, L.*; Schmitt, C.*; Gomonay, O.*; Lebrun, R.*; Ramos, R.*; Saito, Eiji; Sinova, J.*; Kl$"a$ui, M.*

Physical Review Letters, 125(7), p.077201_1 - 077201_6, 2020/08

https://doi.org/10.1103/PhysRevLett.125.077201
 Times Cited Count：36 Percentile：91.52(Physics, Multidisciplinary)

Journal Articles

Spin transport in antiferromagnetic insulators; Progress and challenges

Hou, D.*; Qiu, Z.*; Saito, Eiji

NPG Asia Materials, 11, p.35_1 - 35_6, 2019/07

https://doi.org/10.1038/s41427-019-0135-9
 Times Cited Count：40 Percentile：84.4(Materials Science, Multidisciplinary)

Journal Articles

Antiferromagnetic NiO thickness dependent sign of the spin Hall magnetoresistance in $$gamma$$-Fe$$_2$$O$$_3$$/NiO/Pt epitaxial stacks

Dong, B.-W.*; Baldrati, L.*; Schneider, C.*; Niizeki, Tomohiko*; Ramos, R.*; Ross, A.*; Cramer, J.*; Saito, Eiji; Kl$"a$ui, M.*

Applied Physics Letters, 114(10), p.102405_1 - 102405_5, 2019/03

https://doi.org/10.1063/1.5080766
 Times Cited Count：11 Percentile：52.56(Physics, Applied)

Journal Articles

Proton irradiation enhancement of low-field negative magnetoresistance sensitivity of AlGaN/GaN-based magnetic sensor at cryogenic temperature

Abderrahmane, A.*; Ko, P. J.*; Okada, Hiroshi*; Sato, Shinichiro; Oshima, Takeshi; Sandhu, A.*

IEEE Electron Device Letters, 35(11), p.1130 - 1132, 2014/11

https://doi.org/10.1109/LED.2014.2358613
 Times Cited Count：10 Percentile：49.15(Engineering, Electrical & Electronic)

The longitudinal and transverse magnetoresistances of AlGaN/GaN heterostructure-based micro-Hall sensors were compared with samples irradiated with protons with an energy of 380 keV and fluence of 10$$^{14}$$ (protons/cm$$^{2}$$). Increases in the elastic and inelastic scattering were deduced from weak localization behavior in both samples. The AlGaN/GaN micro-Hall sensors showed stable magnetic sensitivity in non and irradiated samples and increased resistivity after proton irradiation yielded an enhanced magnetoresistance sensitivity in nonirradiated sensors from 160 to 417 V/(A $$cdot$$ T). The minimum detectable magnetic field of irradiated micro-Hall sensors determined from magneto-voltage measurements at 4 K was similar to the minimum detectable magnetic field in the nonirradiated sensors.

Journal Articles

Structure, magnetism and transport of the perovskite manganites $$Ln$$$$_{0.5}$$Ca$$_{0.5}$$MnO$$_{3}$$ ($$Ln$$=Ho, Er, Tm, Yb and Lu)

Yoshii, Kenji; Abe, Hideki*; Ikeda, Naoshi*

Journal of Solid State Chemistry, 178(12), p.3615 - 3623, 2005/12

https://doi.org/10.1016/j.jssc.2005.08.033
 Times Cited Count：25 Percentile：67.28(Chemistry, Inorganic & Nuclear)

no abstracts in English

Journal Articles

Unveiling new magnetic phases of undoped and doped manganites

Hotta, Takashi; Moraghebi, M.*; Feiguin, A.*; Moreo, A.*; Yunoki, Seiji*; Dagotto, E.*

Physical Review Letters, 90(24), p.247203_1 - 247203_4, 2003/06

https://doi.org/10.1103/PhysRevLett.90.247203
 Times Cited Count：83 Percentile：91.21(Physics, Multidisciplinary)

Novel ground-state spin structures in undoped and doped manganites are here investigated based on the orbital-degenerate double-exchange model, by using mean-field and numerical techniques. In undoped manganites, a new antiferromagnetic (AFM) state, called the E-type phase, is found adjacent in parameter space to the A-type AFM phase. Its structure is in agreement with recent experimental results. This insulating E-AFM state is competing with a ferromagnetic metallic phase as well, suggesting that large magneto-resistant effects could exist even in undoped manganese oxides. For doped layered manganites, the phase diagram includes another new AFM phase of the $${rm C_x E_{1-x}}$$-type. Experimental signatures of the new phases are discussed.

Journal Articles

Existence of a metallic ferromagnetic phase in models for undoped manganites

Hotta, Takashi

Physical Review B, 67(10), p.104428_1 - 104428_8, 2003/03

https://doi.org/10.1103/PhysRevB.67.104428
 Times Cited Count：21 Percentile：68.18(Materials Science, Multidisciplinary)

The existence of a novel metal-insulator transition in the ferromagnetic state of models for undoped manganites is here discussed using numerical techniques applied to the $$e_{rm g}$$-orbital degenerate Hubbard model tightly coupled with Jahn-Teller distortions. The ground-state phase diagram is presented in the plane defined by the electron-phonon coupling $$lambda$$ and Coulomb interaction $$u$$. In contrast to the standard one-band Hubbard model for cuprates, the metallic phase is found to exist for finite values of both $$lambda$$ and $$u$$ in the present $$e_{rm g}$$-orbital Hubbard model even at half-filling, due to the Fermi-surface topology which is incompatible with the staggered orbital ordering concomitant to the insulating phase. Based on the present results, a possible scenario for Colossal Magneto-Resistive effect is discussed in undoped manganites.

Journal Articles

Ferromagnetism and giant magnetoresistance in the rare-earth fullerides Eu$$_{6-x}$$Sr$$_x$$C$$_{60}$$

Ishii, Kenji; Fujiwara, Akihiko*; Suematsu, Hiroyoshi*; Kubozono, Yoshihiro*

Physical Review B, 65(13), p.134431_1 - 134431_6, 2002/03

https://doi.org/10.1103/PhysRevB.65.134431
 Times Cited Count：32 Percentile：78.13(Materials Science, Multidisciplinary)

We have studied crystal structure, magnetism and electric transport properties of a europium fulleride Eu$$_6$$C$$_{60}$$ and its Sr-substituted compounds, Eu$$_{6-x}$$Sr$$_x$$C$$_{60}$$. They have a $$bcc$$ structure, which is an isostructure of other $$M_6$$C$$_{60}$$ ($$M$$ represents an alkali atom or an alkaline earth atom). Magnetic measurements revealed that magnetic moment is ascribed to the divalent europium atom with $$S$$ = 7/2 spin, and a ferromagnetic transition was observed at $$T_C$$ = 10 - 14 K. In Eu$$_6$$C$$_{60}$$, we also confirm the ferromagnetic transition by heat capacity measurement. The striking feature in Eu$$_{6-x}$$Sr$$_x$$C$$_{60}$$ is very large negative magnetoresistance at low temperature; the resistivity ratio $$rho$$($$H$$ = 9 T)/$$rho$$($$H$$ = 0 T) reaches almost 10$$^{-3}$$ at 1 K in Eu$$_6$$C$$_{60}$$. Such large magnetoresistance is the manifestation of a strong $$pi$$-$$f$$ interaction between conduction carriers on C$$_{60}$$ and 4$$f$$ electrons of Eu.

Journal Articles

Small-angle neutron scattering study on ferromagnetic correlation in (La, Tb)$$_{2/3}$$Ca$$_{1/3}$$MnO$$_{3}$$

Wakahiki, Masaya*; Metoki, Naoto; Suzuki, Junichi; Oikawa, Kenichi; Nie, J.*; Tachiki, Masashi*; Yamada, Yasusada

Journal of the Physical Society of Japan, 70(4), p.1090 - 1098, 2001/04

https://doi.org/10.1143/JPSJ.70.1090
 Times Cited Count：6 Percentile：42.08(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Polaron correlations in ferromagnetic CMR manganites

Fernandez-Baca, J. A.*; Dai, P.*; Wakabayashi, Nobuyoshi*; Plummer, E. W.*; Katano, Susumu; Tomioka, Yasuhide*; Tokura, Yoshinori*

Journal of the Physical Society of Japan, Vol.70, Supplement A, p.85 - 87, 2001/00

no abstracts in English

Journal Articles

Fermi surface of UB$$_{4}$$ studied by the de Haas-van Alphen oscillation and magnetoresistance experiments

Yamamoto, Etsuji; Homma, Tetsuo; Haga, Yoshinori; Inada, Yoshihiko*; Aoki, Dai*; Tokiwa, Yoshifumi; Suzuki, N.*; Miyake, Kosaku*; Onuki, Yoshichika

Physica B; Condensed Matter, 281-282, p.767 - 768, 2000/06

https://doi.org/10.1016/S0921-4526(99)01096-0
 Times Cited Count：1 Percentile：8.59(Physics, Condensed Matter)

no abstracts in English

Journal Articles

Phase transitions, diffuse scattering and segregation kinetics in the colossal magnetoresistance material Pr$$_{70}$$Ca$$_{30}$$MnO$$_{3}$$

Katano, Susumu; Fernandez-Baca, J. A.*; Yamada, Yasusada

Physica B; Condensed Matter, 276-278, p.786 - 787, 2000/03

https://doi.org/10.1016/S0921-4526(99)01644-0
 Times Cited Count：9 Percentile：47.87(Physics, Condensed Matter)

no abstracts in English

Journal Articles

Anomalous magnetic and transport properties in Ce$$_{2}$$Fe$$_{17}$$ and Lu$$_{2}$$Fe$$_{17}$$

*; Y.Janssen*; *; *; Morii, Yukio

Journal of the Magnetics Society of Japan, 23(1-2), p.108 - 110, 1999/00

no abstracts in English

Journal Articles

Magnetoresistnace and de Haas-van Alphen effect in UB$$_{4}$$

Yamamoto, Etsuji; Homma, Tetsuo; Haga, Yoshinori; Inada, Yoshihiko*; Aoki, Dai*; Tokiwa, Yoshifumi; Suzuki, N.*; Miyake, Kosaku*; Onuki, Yoshichika

Journal of the Physical Society of Japan, 68(10), p.3347 - 3351, 1999/00

https://doi.org/10.1143/JPSJ.68.3347
 Times Cited Count：5 Percentile：44.11(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Anisotropic magnetoresistance in UBe$$_{13}$$

Haga, Yoshinori; Yamamoto, Etsuji; Homma, Tetsuo*; Nakamura, Akio; *; Araki, Shingo*; Okuni, H.*; Onuki, Yoshichika*

Physica B; Condensed Matter, 259-261, p.627 - 628, 1999/00

https://doi.org/10.1016/S0921-4526(98)00948-X
 Times Cited Count：18 Percentile：67.94(Physics, Condensed Matter)

no abstracts in English

Journal Articles

Polaron ordering in low-doping La$$_{1-x}$$Sr$$_{x}$$MnO$$_{3}$$

Yamada, Yasusada*; Hino, O.*; Nodo, S.*; Kaneo, Rinna*; Inami, Toshiya*; Katano, Susumu

Physical Review Letters, 77(5), p.904 - 907, 1996/07

https://doi.org/10.1103/PhysRevLett.77.904
 Times Cited Count：315 Percentile：98.66(Physics, Multidisciplinary)

no abstracts in English

23 (Records 1-20 displayed on this page)