Výsledky vyhledávání - "Yoshida, Atsushi"

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Investigation of coronal properties of X-ray bright G-dwarf stars based on the solar surface magnetic field -- corona relation

Autor: Takasao, Shinsuke, Mitsuishi, Ikuyuki, Shimura, Takuma, Yoshida, Atsushi, Kunitomo, Masanobu, Tanaka, Yuki A., Ishihara, Daisuke

We investigated the coronal properties of G-dwarf stars including the Sun over a wide range of X-ray luminosity $L_{\rm X}$ ($3\times 10^{26}$ to $2\times 10^{30}~{\rm erg~s^{-1}}$). We analyzed the archival data of ten X-ray bright ($L_{\it X}>10^{2

Externí odkaz: http://arxiv.org/abs/2008.04255

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Effects of asymmetric splayed columnar defects on the anomalous peak effect in Ba$_{0.6}$K$_{0.4}$Fe$_{2}$As$_{2}$

Autor: Takahashi, Ayumu, Pyon, Sunseng, Kambara, Tadashi, Yoshida, Atsushi, Tamegai, Tsuyoshi

Publikováno v: Journal of the Physical Society of Japan 89, 094705 (2020)

In order to enhance the critical current density ($J_c$) of superconductors, introduction of columnar defects (CDs) through swift-particle irradiation is effective. By dispersing the direction of CDs (splayed CDs), not only further enhancement of $J_

Externí odkaz: http://arxiv.org/abs/2007.13536

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Anisotropic physical properties and large critical current density in KCa${_2}$Fe${_4}$As${_4}$F${_2}$ single crystal

Autor: Pyon, Sunseng, Kobayashi, Yuto, Takahashi, Ayumu, Li, Wenjie, Wang, Teng, Mu, Gang, Ichinose, Ataru, Kambara, Tadashi, Yoshida, Atsushi, Tamegai, Tsuyoshi

Publikováno v: Phys. Rev. Materials 4, 104801 (2020)

We present a systematic study of electrical resistivity, Hall coefficient, magneto-optical imaging, magnetization, and STEM analyses of KCa${_2}$Fe${_4}$As${_4}$F${_2}$ single crystals. Sharp diamagnetic transition and magneto-optical imaging reveal

Externí odkaz: http://arxiv.org/abs/2006.04478

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