JAEA
  • help
  • PC | SP
  • JP | EN
          
Refine your search：     
Report No.
 - 
Clear All
Search Results: Records 1-6 displayed on this page of 6
  • 1

Presentation/Publication Type

Initialising ...

Refine

Journal/Book Title

Initialising ...

Meeting title

Initialising ...

First Author

Initialising ...

Keyword

Initialising ...

Language

Initialising ...

Publication Year

Initialising ...

Held year of conference

Initialising ...

Save select records

Journal Articles

Low temperature structure of FeSr$$_{2}$$YCu$$_{2}$$O$$_{6+delta}$$ magnetic superconductor

Mochiku, Takashi*; Hata, Yoshiaki*; Wuernisha, T.*; Igawa, Naoki; Hoshikawa, Akinori*; Ishigaki, Toru*; Yasuoka, Hiroshi*; Hirata, Kazuto*

Physica C, 470(Suppl.1), p.S158 - S159, 2010/12

https://doi.org/10.1016/j.physc.2009.12.047
 Times Cited Count：2 Percentile：12.12(Physics, Applied)

We have performed neutron powder diffraction of the superconducting FeSr$$_{2}$$YCu$$_{2}$$O$$_{6+}$$$$_{delta}$$ and the nonsuperconducting FeSr$$_{2}$$Y(Cu$$_{0.95}$$Zn$$_{0.05}$$)$$_{2}$$O$$_{6+}$$$$_{delta}$$ samples at low temperature and room temperature to investigate the relation between the crystal structure ant the physical properties. Neutron diffraction study indicates that the magnetic order in this compound is not long-range order because we observed no extra reflection due to the magnetic superstructure. We have observed structural anomaly related to Cu in the superconducting sample around 30 K although we could not observe it in the nonsuperconducting sample. There is possibility of the change of the charge distribution around 30 K in the superconducting sample.

Journal Articles

High-energy spectroscopic study of the III-V nitride-based diluted magnetic semiconductor Ga$$_{1-x}$$Mn$$_{x}$$N

Hwang, J. I.*; Ishida, Yukiaki*; Kobayashi, Masaki*; Hirata, Gen*; Takubo, Ko*; Mizokawa, Takashi*; Fujimori, Atsushi; Okamoto, Jun; Mamiya, Kazutoshi*; Saito, Yuji; et al.

Physical Review B, 72(8), p.085216_1 - 085216_6, 2005/08

A2004-0178.pdf:0.19MB

https://doi.org/10.1103/PhysRevB.72.085216
 Times Cited Count：64 Percentile：87.86(Materials Science, Multidisciplinary)

no abstracts in English

Oral presentation

Low temperature structure of FeSr$$_{2}$$YCu$$_{2}$$O$$_{6+delta}$$ magnetic superconductor

Mochiku, Takashi*; Hata, Yoshiaki*; Tuerxun, W.*; Igawa, Naoki; Hoshikawa, Akinori*; Ishigaki, Toru*; Yasuoka, Hiroshi*; Hirata, Kazuto*

no journal, , 

FeSr$$_{2}$$YCu$$_{2}$$O$$_{6+delta}$$ is known as the Ba$$_{2}$$YCu$$_{3}$$O$$_{6+delta}$$ related super conducting compound with the substitution of the Fe for Cu, only when it is annealed in reduced atmosphere and subsequently in oxidized atmosphere. In this study, we have performed neutron powder diffraction of FeSr$$_{2}$$YCu$$_{2}$$O$$_{6+delta}$$ to investigate the magnetic disorder-ordering mechanism. No magnetic reflection was observed even below the magnetic transition temperature. This result indicated that the material has not long-range magnetic-ordering.

Oral presentation

Oxygen arrangement in FeSr$$_{2}$$YCu$$_{2}$$O$$_{6+delta}$$ system

Mochiku, Takashi*; Hata, Yoshiaki*; Tsuchiya, Yoshinori*; Igawa, Naoki; Hoshikawa, Akinori*; Ishigaki, Toru*; Yasuoka, Hiroshi*; Hirata, Kazuto*

no journal, , 

FeSr$$_{2}$$YCu$$_{2}$$O$$_{6+delta}$$ structure exhibits superconductivity around 60 K, when it is properly annealed in N$$_{2}$$ and subsequently in O$$_{2}$$. In this study, oxygen arrangement in FeSr$$_{2}$$YCu$$_{2}$$O$$_{6+delta}$$ system is investigated by the neutron diffraction method. Cu and Fe in the crystal were ordered by annealing around 700$$^{circ}$$C in N$$_{2}$$ due to structure phase transition from the tetragonal to monoclinic phase with a superlattice structure. It was revealed that the FeO$$_{4}$$ tetrahedron was formed and ordered in the crystal while disordered in the original structure without N$$_{2}$$-annealing. It was observed that the FeO$$_{4}$$ tetrahedron changed to the octahedron by the subsequently annealing in O$$_{2}$$.

Oral presentation

Oxygen deficiency in FeSr$$_{2}$$YCu$$_{2}$$O$$_{6+delta}$$ magnetic superconductor

Mochiku, Takashi*; Hata, Yoshiaki*; Tsuchiya, Yoshinori*; Igawa, Naoki; Hoshikawa, Akinori*; Ishigaki, Toru*; Yasuoka, Hiroshi*; Ozawa, Kiyoshi*; Hirata, Kazuto*

no journal, , 

It is well known that the superconductive phase is related with the ordering of Cu and Fe, and with the oxygen deficiency in FeSr$$_{2}$$YCu$$_{2}$$O$$_{6+delta}$$. We investigated the oxygen deficiency of FeSr$$_{2}$$YCu$$_{2}$$O$$_{6+delta}$$ by neutron diffraction method. It was shown that non superconductor phase was stable around the oxygen content 6+$$delta$$ = 7 and that the superconductive phase was appeared at 7.6 of the oxygen content 6+$$delta$$.

Oral presentation

Disorder and physical properties in FeSr$$_{2}$$YCu$$_{2}$$O$$_{6+delta}$$ magnetic superconductor

Mochiku, Takashi*; Hata, Yoshiaki*; Hoshikawa, Akinori*; Iwase, Kenji*; Sulistyanintyas, D.*; Oguro, Hidetoshi*; Ishigaki, Toru*; Igawa, Naoki; Tsuchiya, Yoshinori*; Iwai, Hideo*; et al.

no journal, , 

FeSr$$_{2}$$YCu$$_{2}$$O$$_{6+delta}$$ is expected to coexhibit superconductivity and magnetism, which has a tetragonal structure with the oxygen defect and the substitution between Cu and Fe. We have performed neutron powder diffraction of the FeSr$$_{2}$$YCu$$_{2}$$O$$_{6+delta}$$ system to investigate the relation between the crystal structure and the physical properties.

6 (Records 1-6 displayed on this page)
  • 1