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Takanashi, H.; Tanaka, Toshiaki; Oono, T.; Matsuki, H.; Hattori, Takeshi

doi:10.1023/a:1018375811720

Cited by 6 publications

(5 citation statements)

References 5 publications

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“…[28][29][30][31][32][33][34][35][36][37][38][39][40] The area surrounded by the black dotted line in the top left indicates the target region for use in next-generation magnetic read heads. MTJ devices using existing materials [28][29][30] appear unlikely to achieve the target MR ratio at an RA of 10-100 mΩ µm 2 . Recently, some research groups have reported that the MR ratio can be greatly increased for current perpendicular-to-plane (CPP)-GMR devices, [31][32][33][34][35][36][37][38][39][40] as discussed in the following section.…”

Section: Magnetic Writing and Spin Injection Methodsmentioning

confidence: 99%

“…Spin current is one of the key concepts of spintronics. 2,4) Figure 2 shows a schematic of a spin current. When electron spins are not considered, the flow of electrons is a charge current (with density J c ) [Fig.…”

Section: Spin Currentmentioning

confidence: 99%

“…I recommend those who wish to study this field in more detail to also refer to other explanatory books and articles on spintronics. [1][2][3][4][5][6][7][8][9][10] 2. Spintronics…”

Section: Introductionmentioning

confidence: 99%

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Spintronics technology and device development

Ando

2015

Jpn. J. Appl. Phys.

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Spintronics is an emerging field of research that has made great advances in the last two decades. During this period, various new outstanding spintronics-related phenomena and devices using these phenomena have been proposed. In recent years, the period from the discovery of new spintronics-related materials and phenomena to the development and commercialization of devices using such materials and phenomena has markedly shortened. The importance of understanding the fundamental principles of spintronics has been increasing. In this review, I will first overview the features of spintronics technologies. Then, I will summarize the key technologies applied in the development of spintronic devices and describe their future prospects.

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Section: Magnetic Writing and Spin Injection Methodsmentioning

confidence: 99%

Section: Spin Currentmentioning

confidence: 99%

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Spintronics technology and device development

Ando

2015

Jpn. J. Appl. Phys.

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“…Spintronics is a field of advanced technology that has been developed significantly in recent years. [1][2][3][4][5][6][7][8][9][10] In principle, the electron transport in spintronics is controlled not only by the electrical charge of electrons but also their spins. Hence, spintronics can be considered as a combination of electronics and magnetics.…”

Section: Introductionmentioning

confidence: 99%

Chemically synthesized magnetic Co–Fe–Ga alloy nanoparticles

Imai¹,

Shima²

2016

Jpn. J. Appl. Phys.

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Magnetic properties of Co2Fe x Ga y alloy nanoparticles in the L21 ordered phase produced by chemical synthesis and post annealing have been investigated. Structural analyses of the Co2Fe x Ga y samples by X-ray diffraction show that both ordered B2 and L21 phases are formed when Ga composition is in the range 0.66 ≤ y ≤ 1.42. With increasing y from 0.58 to 1.4 at x = 1.0, the coercivity increases from 7.1 to 23 mT, while the saturation magnetization decreases from 970 to 410 kA/m. Microstructural analyses using TEM reveal that the alloy particles annealed at 973 K are agglomerated by sintering. When Al(NO3)3 was added during the synthesis, the average particle size significantly decreases from 84 to 12 nm, presumably due to the formation of aluminum oxides, resulting in the decrease in coercivity from 29 to 5.1 mT.

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“…pin current consists of antiparallel flows of up (ℏ/2) and down (−ℏ/2) spin angular moments with equal magnitude particle current density, i.e., j j =-  , 1,2) where 2πℏ is Planck's constant. Since the same type of charge is accompanied by antiparallel flows of up and down spins, a spatial gradient of scalar potential cannot couple with the spin current, so no Joule heat is generated.…”

mentioning

confidence: 99%

Entropy production by thermodynamic currents in ambipolar conductors with identical spin dynamics characteristics between holes and electrons

Aktar

Sakai

Hasegawa

et al. 2019

Appl. Phys. Express

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We have evaluated the role of spin current in the energy dissipation mechanism in ambipolar conductors with identical spin-related characteristics between holes and electrons. Application of the Gibbs–Duhem relation to ambipolar conductors establishes a thermodynamic relation between the spin-dependent chemical potentials of holes and electrons, inducing an asymmetric spin splitting between the hole and electron chemical potentials. This yields two types of spin relaxation so as to allow the antiparallel spin current, where hole and electron spins flow in the opposite direction, to have a large spin diffusion length, but to retain that of the parallel spin current at a standard value.

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Untitled

Cited by 6 publications

References 5 publications

Spintronics technology and device development

Spintronics technology and device development

Chemically synthesized magnetic Co–Fe–Ga alloy nanoparticles

Entropy production by thermodynamic currents in ambipolar conductors with identical spin dynamics characteristics between holes and electrons

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