Large Negative Magnetoresistance in Ba3−xEuxNb5O15

Kenta Iwamoto, Wataru Sekino, Satomi Ito, Yumiko Katayama, Kazunori Ueno, Takuro Katsufuji*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


We found a large negative magnetoresistance in Ba3-xEuxNb5O15 with a tetragonal tungsten bronze structure, which changes from a metallic state (x = 0) to an insulating state (x = 3) under variation of x. The magnitude of the magnetoresistance ρc(0)=ρc(H), where ρc(H) is the resistivity along the c axis with the applied magnetic field of H, increases with x and reaches ∼5000 near the metal–insulator phase boundary. Such a large negative magnetoresistance is likely to be due to the coupling between the itinerant 4d electrons in Nb and the localized 4 f spins in Eu, and the disorder arising from Eu ions in this series of compounds.

Original languageEnglish
Article number033702
Journaljournal of the physical society of japan
Issue number3
Publication statusPublished - 2022 Mar 15

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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