JAEA
  • help
  • PC | SP
  • JP | EN
          
Refine your search：     
Report No.
 - 
Clear All
Search Results: Records 1-2 displayed on this page of 2
  • 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

Oral presentation

Site preference and magnetic structure of M-type BaTiMnFe$$_{10}$$O$$_{19}$$ ferrite determined by X-ray and neutron diffraction methods

Takayasu, Shunichi*; Yoshizaki, Jumpei*; Okube, Maki*; Toyoda, Takeshi*; Igawa, Naoki; Sasaki, Satoshi*

no journal, , 

Site preferences of Ti and Mn and the magnetic structure of M-type BaTiMnFe$$_{10}$$O$$_{19}$$ ferrite were analyzed using the X rays and neutron powder diffraction method. The intensity difference on the magnetic scattering was clearly observed below and above the ${it T}$c, showing the ferrimagnetic spin arrangement along with the ${it c}$ axis. Site-occupancy refinements give the results that Ti ions occupy the 4${it f}$1 (24%), 2${it a}$ (15%) and 2${it b}$ (15%) sites, while Mn ions prefer to 4${it f}$2 (24%) and 12${it k}$ (24%). Magnetic moments were obtained from the Rietveld refinements, which are 3.56, 3.37, -3.86, -3.72 and 3.68 $$mu$$$$_{B}$$ at ${it T}$ = 8 K for 2${it a}$, 2${it b}$, 4${it f}$1, 4${it f}$2 and 12${it k}$ sites, respectively.

Oral presentation

Relation between crystal structure and phase transition of superprotonic conductor, Rb$$_{3-x}$$K$$_{x}$$H(SeO$$_{4}$$)$$_{2}$$

Kiyanagi, Ryoji; Matsuo, Yasumitsu*; Ohara, Takashi; Kawasaki, Takuro; Oikawa, Kenichi; Kaneko, Koji; Tamura, Itaru; Hanashima, Takayasu*; Munakata, Koji*; Nakao, Akiko*; et al.

no journal, , 

M$$_{3}$$H(SeO$$_{4}$$)$$_{2}$$ forms a material group that exhibits superprotonic conductivity at rather low temperature. The superprotonic conductivity manifests itself upon a structural phase transition. The phase transition temperature varies depending on the elements of M and X. In order to clarify the relation between the crystal structure and the phase transition, Rb$$_{3-x}$$K$$_{x}$$H(SeO$$_{4}$$)$$_{2}$$ was investigated by means of a conductivity measurement and single crystal neutron structure analyses. The phase transition temperature was found to be non-linear to the variation of x by the conductivity measurement. The structure analyses revealed that the site occupancy of K at one of two M sites non-linearly varied with respect to x. This suggest that a close relation between the M site and the superprotonic phase transition.

2 (Records 1-2 displayed on this page)
  • 1