研究者詳細 - 谷山　智康

論文 - 谷山　智康

分割表示 231 件中 201 - 220 件目／全件表示 >>

FePt nanoparticle-assembly for magnetic recording media 査読有り

Kitamoto Y, Sakuma H, Jogo A, Taniyama T, Yamazaki Y, Nishio H, Yamamoto H

MAGNETIC MATERIALS, PROCESSES, AND DEVICES VII AND ELECTRODEPOSITION OF ALLOYS, PROCEEDINGS 2002 巻 ( 27 ) 頁： 483-490 2003年

Crossover of magnetotransport process toward spin-polarized tunneling in manganite thin films 査読有り国際誌

T Taniyama, M Yamasaki, Y Yamazaki

APPLIED PHYSICS LETTERS 81 巻 ( 24 ) 頁： 4562 - 4564 2002年12月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：AMER INST PHYSICS

We report on the magnetoresistive features of well-characterized polycrystalline manganite thin films as a function of film thickness. A crossover of the magnetization process from domain wall displacement to magnetic rotation of each grain is observed around a thickness of 25 nm, accompanied with the maximum of the coercivity. The thickness dependence of the electrical resistivity clearly distinguishes the transport mechanism at 25 nm, below which the magnetoresistance can be well scaled by similar to(M/M-S)(2), using the magnetization M and the saturation magnetization M-S. Spin-polarized tunneling transport between adjacent grains provides a comprehensive picture for the magnetotransport data. (C) 2002 American Institute of Physics.

DOI： 10.1063/1.1528282

Web of Science

J-GLOBAL

Surface magnetism of Pd-Fe fine particles 査読有り国際誌

T Shinohara, M Shigemune, T Sato, T Taniyama

IEEE TRANSACTIONS ON MAGNETICS 38 巻 ( 5 ) 頁： 2634 - 2636 2002年9月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

Magnetization and ac susceptibility measurements of Pd98.0Fe2.0 fine particles (average radii of 7.6-20.4 nm) gave the evidence of magnetic ordering of the surface layer in fine particle. The magnetic transition temperature of the surface layer in Pd-Fe fine particles was determined to be about 40 K based on the peaks in nonlinear susceptibility, and it slightly decreased with decreasing the particles size. Moreover, the size dependence of saturation magnetization indicates that the surface layer has no saturation magnetization at low temperature.

DOI： 10.1109/TMAG.2002.801968

Web of Science

J-GLOBAL

Change in resistance of CuFe wires induced by spin injection 査読有り国際誌

T. Taniyama, N. Fujiwara, Y. Kitamoto, Y. Yamazaki

IEEE Transactions on Magnetics 38 巻 ( 5 I ) 頁： 2872 - 2874 2002年9月

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

Spin injection from a ferromagnetic metal Co into a Kondo alloy CuFe is demonstrated using the devices with a Co/CuFe wire junction. The temperature dependent resistivity of CuFe shows an increase below 20 K as spin current flows from CuFe into Co as seen in Kondo alloys. In contrast, the resistivity for the opposite current direction from Co into CnFe decreases at low temperatures at a current of 250 μA. The difference between the resistivities of both the current directions logarithmically increases with decreasing temperature, indicating the suppression of the spin scattering at Fe impurities that causes the logarithmic increase in Kondo alloys.

DOI： 10.1109/TMAG.2002.803135

Web of Science

Scopus

J-GLOBAL

Magneto-optical properties and morphology of particulate film consisting of Bi-YIG coprecipitated particles 査読有り

Kuroda CS, Taniyama T, Kitamoto Y, Yamazaki Y

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS 241 巻 ( 2-3 ) 頁： 201-206 2002年3月

Strain-induced anisotropic low-field magnetoresistance of La-Sr-Mn-O thin films 査読有り

Choi KK, Taniyama T, Yamazaki Y

JOURNAL OF APPLIED PHYSICS 90 巻 ( 12 ) 頁： 6145-6150 2001年12月

Selective dry etching of manganite thin films for high sensitive magnetoresistive sensors 査読有り

Naoe M, Hamaya K, Fujiwara N, Taniyama T, Kitamoto Y, Yamazaki Y

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS 235 巻 ( 1-3 ) 頁： 223-226 2001年10月

Improvement in magneto-optical properties of Bi-YIG particulate films by reduction in particle size 査読有り

Kuroda CS, Taniyama T, Kitamoto Y, Yamazaki Y, Hirano T

IEEE TRANSACTIONS ON MAGNETICS 37 巻 ( 4 ) 頁： 2432-2434 2001年7月

Magnetotransport and Mossbauer study of Fe3O4/gamma Fe2O3 granular thin films 査読有り

Taniyama T, Kitamoto Y, Yamazaki Y

JOURNAL OF APPLIED PHYSICS 89 巻 ( 11 ) 頁： 7693-7695 2001年6月

Magnetoresistance of manganite thin films induced by reaction with substrate 査読有り

Hamaya K, Taniyama T, Yamazaki Y

JOURNAL OF APPLIED PHYSICS 89 巻 ( 11 ) 頁： 6320-6323 2001年6月

X-ray magnetic circular dichroism of PdFe fine particles at Pd L-2,L-3 edges 査読有り

Shinohara T, Sato T, Taniyama T, Sakurai H

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS 226 巻頁： 1939-1941 2001年5月

Magnetotransport and spin con-figurations in patterned ferromagnetic wires 査読有り

Taniyama T, Nakatani L, Yakabe T, Nomura A, Shiiki K, Yamazaki Y

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS 226 巻頁： 1850-1852 2001年5月

Iron mixed-valence compounds, BaSm(Cu0.5+xFe0.5-x)(2)O5+delta II: The Fe2.5+ state and magnetic properties 査読有り

Linden J, Nakamura J, Pietari T, Taniyama T, Karppinen M, Yamauchi H

PHYSICA C 338 巻 ( 1-2 ) 頁： 126-131 2000年8月

Magnetic properties, oxygen content and metal valences in BaRE(Cu0.5Fe0.5)(2)O5+delta with RE = Lu, Yb, Y, Eu, Sm, Nd and Pr 査読有り

Kochi M, Linden J, Taniyama T, Lehmus K, Karppinen M, Yamauchi H

PHYSICA C 338 巻 ( 1-2 ) 頁： 132-136 2000年8月

Magnetic and magneto-transport properties of gamma Fe2O3-grain-embedded Fe3O4 thin films 査読有り

Uotani M, Taniyama T, Yamazaki Y

JOURNAL OF APPLIED PHYSICS 87 巻 ( 9 ) 頁： 5585-5587 2000年5月

Control of domain structures and magnetotransport properties in patterned ferromagnetic wires 査読有り

Taniyama T, Nakatani I, Yakabe T, Yamazaki Y

APPLIED PHYSICS LETTERS 76 巻 ( 5 ) 頁： 613-615 2000年1月

Microstructure and low-field magnetoresistance of La-Sr-Mn-O thin films 査読有り

Choi KK, Taniyama T, Yamazaki Y

ELECTROCHEMICAL TECHNOLOGY APPLICATIONS IN ELECTRONICS III 99 巻 ( 34 ) 頁： 229-234 2000年

Magnetization process of zigzag shaped Co wires 査読有り

Taniyama T, Nakatani I, Sato T, Namikawa T, Yamazaki Y

IEEE TRANSACTIONS ON MAGNETICS 35 巻 ( 5 ) 頁： 3478-3480 1999年9月

Room-temperature and low-field magnetoresistance of La-Sr-Mn-O thin films 査読有り

Choi KK, Taniyama T, Yamazaki Y

IEEE TRANSACTIONS ON MAGNETICS 35 巻 ( 5 ) 頁： 2844-2846 1999年9月

Bias dependent intergrain tunneling in lanthanum manganite thin films 査読有り

Nakano K, Naoe M, Yamasaki M, Choi KK, Taniyama T, Yamazaki Y

IEEE TRANSACTIONS ON MAGNETICS 35 巻 ( 5 ) 頁： 2859-2861 1999年9月

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