Search Results - "Takahashi, Y K"

Spin gapless semiconducting behavior in equiatomic quaternary CoFeMnSi Heusler alloy by Bainsla, Lakhan, Mallick, A. I., Raja, M. Manivel, Nigam, A. K., Varaprasad, B. S. D. Ch. S., Takahashi, Y. K., Alam, Aftab, Suresh, K. G., Hono, K.

“…In this paper, we report the signature of spin gapless semiconductor (SGS) in CoFeMnSi that belongs to the Heusler family. SGS is a new class of magnetic…”
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All-optical control of ferromagnetic thin films and nanostructures by Lambert, C-H., Mangin, S., Varaprasad, B. S. D. Ch. S., Takahashi, Y. K., Hehn, M., Cinchetti, M., Malinowski, G., Hono, K., Fainman, Y., Aeschlimann, M., Fullerton, E. E.

“…The interplay of light and magnetism allowed light to be used as a probe of magnetic materials. Now the focus has shifted to use polarized light to alter or…”
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Microstructure optimization to achieve high coercivity in anisotropic Nd–Fe–B thin films by Cui, W.B., Takahashi, Y.K., Hono, K.

“…A high coercivity of 2.35MAm−1 (29.5kOe) is demonstrated using perpendicular anisotropy Nd–Fe–B films. Single layer columnar grown Nd–Fe–B thin films with a…”
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Beyond a phenomenological description of magnetostriction by Reid, A. H., Shen, X., Maldonado, P., Chase, T., Jal, E., Granitzka, P. W., Carva, K., Li, R. K., Li, J., Wu, L., Vecchione, T., Liu, T., Chen, Z., Higley, D. J., Hartmann, N., Coffee, R., Wu, J., Dakovski, G. L., Schlotter, W. F., Ohldag, H., Takahashi, Y. K., Mehta, V., Hellwig, O., Fry, A., Zhu, Y., Cao, J., Fullerton, E. E., Stöhr, J., Oppeneer, P. M., Wang, X. J., Dürr, H. A.

“…Magnetostriction, the strain induced by a change in magnetization, is a universal effect in magnetic materials. Owing to the difficulty in unraveling its…”
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Quantitative analysis of anisotropic magnetoresistance in Co2MnZ and Co2FeZ epitaxial thin films: A facile way to investigate spin-polarization in half-metallic Heusler compounds by Sakuraba, Y., Kokado, S., Hirayama, Y., Furubayashi, T., Sukegawa, H., Li, S., Takahashi, Y. K., Hono, K.

“…Anisotropic magnetoresistance (AMR) effect has been systematically investigated in various Heusler compounds Co2MnZ and Co2FeZ (Z = Al, Si, Ge, and Ga)…”
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Large magnetoresistance in current-perpendicular-to-plane pseudo spin-valves using Co2Fe(Ga0.5Ge0.5) Heusler alloy and AgZn spacer by Du, Ye, Furubayashi, T., Sasaki, T. T., Sakuraba, Y., Takahashi, Y. K., Hono, K.

“…Fully epitaxial pseudo spin-valves (PSVs) using 10-nm-thick Co2Fe(Ga0.5Ge0.5) (CFGG) ferromagnetic layers and a 5-nm-thick AgZn space layer annealed at 630 °C…”
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Spin injection efficiency through the pumping in epitaxial Co2MnSi/Pt thin film by Sasaki, Y., Sugimoto, S., Takahashi, Y. K., Kasai, S.

“…The spin injection efficiencies in epitaxial Co2MnSi (CMS)/Pt thin films were investigated in spin pumping configuration. The inverse spin Hall (effect)…”
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Columnar Structure in FePt-C Granular Media for Heat-Assisted Magnetic Recording by Varaprasad, B. S. D. C. S., Wang, J., Shiroyama, T., Takahashi, Y. K., Hono, K.

“…We attempted a compositionally graded sputtering process to overcome the phase separation in the growth direction in the FePt-C granular film in order to…”
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Large enhancement of bulk spin polarization by suppressing CoMn anti-sites in Co2Mn(Ge0.75Ga0.25) Heusler alloy thin film by Li, S., Takahashi, Y. K., Sakuraba, Y., Tsuji, N., Tajiri, H., Miura, Y., Chen, J., Furubayashi, T., Hono, K.

“…We have investigated the structure and magneto-transport properties of Co2Mn(Ge0.75Ga0.25) (CMGG) Heusler alloy thin films with near-stoichiometric and Mn-rich…”
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Temperature dependence of magneto-transport properties in Co2Fe(Ga0.5Ge0.5)/Cu lateral spin valves by Ikhtiar, Kasai, S., Takahashi, Y. K., Furubayashi, T., Mitani, S., Hono, K.

“…The non-local spin signals of Co2Fe(Ga0.5Ge0.5)/Cu lateral spin valves with sub-micron size dimensions were measured with varying temperatures. The non-local…”
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Mechanism of coercivity enhancement by Ag addition in FePt-C granular films for heat assisted magnetic recording media by Varaprasad, B. S. D. Ch. S., Takahashi, Y. K., Wang, J., Ina, T., Nakamura, T., Ueno, W., Nitta, K., Uruga, T., Hono, K.

“…We investigated the Ag distribution in a FePtAg-C granular film that is under consideration for a heat assisted magnetic recording medium by…”
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001⟩ textured polycrystalline current-perpendicular-to-plane pseudo spin-valves using Co2Fe(Ga0.5Ge0.5) Heusler alloy by Du, Ye, Varaprasad, B. S. D. Ch. S., Takahashi, Y. K., Furubayashi, T., Hono, K.

“…The orientation dependence of current-perpendicular-to-plane giant-magnetoresistance (CPP-GMR) was investigated by fabricating ⟨001⟩ textured polycrystalline…”
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On low-temperature ordering of FePt films by Takahashi, Y.K., Hono, K.

“…The mechanism of low-temperature ordering in FePt continuous and granular films is discussed. TEM observation of the in situ ordered FePt film indicated that…”
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Thermal engineering of non-local resistance in lateral spin valves by Kasai, S., Hirayama, S., Takahashi, Y. K., Mitani, S., Hono, K., Adachi, H., Ieda, J., Maekawa, S.

“…We study the non-local spin transport in Permalloy/Cu lateral spin valves (LSVs) fabricated on thermally oxidized Si and MgO substrates. While these LSVs show…”
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Effect of Cu on the structure and magnetic properties of FePt sputtered film by Takahashi, Y.K., Ohnuma, M., Hono, K.

“…We have investigated the effect of Cu addition to the FePt alloy on the ordering kinetics and the coercivities of sputter deposited thin films. By alloying 4…”
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Structure Optimization of FePt-C Nanogranular Films for Heat-Assisted Magnetic Recording Media by Pandey, H., Wang, J., Shiroyama, T., Varaprasad, B. S. D. C. S., Sepehri-Amin, H., Takahashi, Y. K., Perumal, A., Hono, K.

“…Systematic investigations for the optimization of FePt-C nanogranular films for heat-assisted magnetic recording media are overviewed. FePt-C films prepared by…”
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Preparation and magnetic properties of highly coercive FePt films by Shima, T., Takanashi, K., Takahashi, Y. K., Hono, K.

“…The magnetization processes of highly ordered FePt(001) films with large perpendicular magnetic anisotropy have been studied. The film morphology was…”
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Highly spin-polarized Co2MnGa0.5Sn0.5 Heusler compound by VARAPRASAD, B. S. D. Ch. S, RAJANIKANTH, A, TAKAHASHI, Y. K, HONO, K

“…Point contact Andreev reflection measurements of Co2MnSn1-xGax alloys showed that the spin polarization of L21 ordered quaternary Co2MnSn0.5Ga0.5 compound…”
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Microstructure and spin polarization of quaternary Co2Cr1-xVxAl, Co2V1-xFexAl and Co2Cr1-xFexAl Heusler alloys by KARTHIK, S. V, RAJANIKANTH, A, TAKAHASHI, Y. K, OHKUBO, T, HONO, K

“…The microstructures, magnetic properties and spin polarization of quaternary Co2Cr1-xVxAl, Co2V1-xFexAl and Co2Cr1-xFexAl alloys were investigated. Phase…”
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Publisher Correction: Beyond a phenomenological description of magnetostriction by Reid, A. H., Shen, X., Maldonado, P., Chase, T., Jal, E., Granitzka, P. W., Carva, K., Li, R. K., Li, J., Wu, L., Vecchione, T., Liu, T., Chen, Z., Higley, D. J., Hartmann, N., Coffee, R., Wu, J., Dakowski, G. L., Schlotter, W. F., Ohldag, H., Takahashi, Y. K., Mehta, V., Hellwig, O., Fry, A., Zhu, Y., Cao, J., Fullerton, E. E., Stöhr, J., Oppeneer, P. M., Wang, X. J., Dürr, H. A.

“…“The technical support from SLAC Accelerator Directorate, Technology Innovation Directorate, LCLS laser division and Test Facility Division is gratefully…”
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