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Journal Articles

The Role of collision ionization of K-shell ions in nonequilibrium plasmas produced by the action of super strong, ultrashort PW-class laser pulses on micron-scale argon clusters with intensity up to 5 $$times$$ 10$$^{21}$$ W/cm$$^{2}$$

Skobelev, I. Yu.*; Ryazantsev, S. N.*; Kulikov, R. K.*; Sedov, M. V.*; Filippov, E. D.*; Pikuz, S. A.*; Asai, Takafumi*; Kanasaki, Masato*; Yamauchi, Tomoya*; Jinno, Satoshi; et al.

Photonics (Internet), 10(11), p.1250_1 - 1250_11, 2023/11

https://doi.org/10.3390/photonics10111250
 Times Cited Count：0 Percentile：0(Optics)

It is challenging to clearly distinguish the impacts of the optical field and collisional ionization in the evolution of the charge state of a plasma produced when matter interacts with high-intensity laser pulses. In this work, time-dependent calculations of plasma kinetics are used to show that it is possible only when low-density gaseous targets with sufficiently small clusters are used. In the case of Ar plasma, the upper limit of the cluster radius was estimated to be $$R_0 = 0.1 mu$$m.

Oral presentation

The Development of the magnetic order in multiferroic material NdCrTiO$$_{5}$$ revealed by the neutron diffraction study

Kori, Shunsuke*; Igarashi, Taichi*; Okazaki, Ryuji*; Taniguchi, Hiroki*; Tanisaki, Ichiro*; Yasui, Yukio*; Igawa, Naoki; Hoshikawa, Akinori*; Ishigaki, Toru*

no journal, , 

The neutron powder diffraction for the multiferroic material, NdCrTiO$$_{5}$$ has been carried out to investigate the development of the magnetic order in the material. We found the intensities of magnetic peaks increased with decreasing temperature below the transition temperature T$$_{N}$$. We discuss temperate dependence of magnetic moments and the development of magnetic order.

Oral presentation

Magnetic properties of RCrTiO$$_{5}$$ (R=rare earth elements)

Yasui, Yukio*; Miyamoto, Takuma*; Kori, Shunsuke*; Terasaki, Ichiro*; Yoshizawa, Daichi*; Mitsuru, Akaki*; Hagiwara, Masayuki*; Matsukawa, Takeshi*; Yoshida, Yukihiko*; Hoshikawa, Akinori*; et al.

no journal, , 

We have measured the specific heat and magnetization up to 50 T of polycrystalline samples of RCrTiO$$_{5}$$ (R=Pr, Nd, Eu, Sm and Gd) and also carried out powder neutron diffraction experiments of NdCrTiO$$_{5}$$ and Nd$$_{0.5}$$Pr$$_{0.5}$$CrTiO$$_{5}$$. From the analyses of specific heat data and magnetization curves up to 50 T of the systems, we have evaluated the magnetic interactions between the Cr$$^{3+}$$ - Cr$$^{3+}$$ magnetic moments and between the Cr$$^{3+}$$ -R$$^{3+}$$ ones. The temperature dependence of neutron magnetic reflection intensities of NdCrTiO$$_{5}$$ indicate that both the Cr$$^{3+}$$-moments and the Nd$$^{3+}$$-moments simultaneously order at $$T_mathrm{N}$$. Basis of the obtained magnetic behavior, the mechanism of magnetoelectric effect of RCrTiO$$_{5}$$ will be discussed.

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