Magnetic properties of hole-doped pyrochlore iridate (Y1-x-ycuxcay)2ir2o7

Julia Angel, Retno Asih, Hironori Nomura, Tomoya Taniguchi, Kazuyuki Matsuhira, Muhammad Redo Ramadhan, Irwan Ramli, Makoto Wakeshima, Yukio Hinatsu, Mohamed Ismail Mohamed-Ibrahim, Shukri Sulaiman, Isao Watanabe

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We report the results of studies on the electronic state of the hole-doped Y-based pyrochlore iridate, (Y1-x-yCuxCay)2Ir2O7. We carried out the resistivity, Muon Spin Relaxation (μSR), X-ray Photoemission Spectroscopy (XPS) measurements and Density Functional Theory (DFT) calculations on the non-doped (x=y=0) and doped (x=0.05, y=0.15) systems. We found in the non-doped system that the magnetic ordering of Ir spins which was accompanied by the metal-insulator transition (MIT) occurred at around 157 K and disappeared in the doped system in which MIT seems to disappear or smeared out. We suggest from the current study that a quantum critical point which shows a change in the electronic ground state from insulating to metallic to exist between those two systems.

Original languageEnglish
Title of host publicationFunctional Properties of Modern Materials II
EditorsBudhy Kurniawan, Agustinus Agung Nugroho, Darminto, Isao Watanabe, Risdiana
PublisherTrans Tech Publications Ltd
Pages269-276
Number of pages8
ISBN (Print)9783035714968
DOIs
Publication statusPublished - 1 Jan 2019
Event4th International Conference on Functional Materials Science, ICFMS 2018 - Bali, Indonesia
Duration: 13 Nov 201815 Nov 2018

Publication series

NameMaterials Science Forum
Volume966 MSF
ISSN (Print)0255-5476

Conference

Conference4th International Conference on Functional Materials Science, ICFMS 2018
CountryIndonesia
CityBali
Period13/11/1815/11/18

Keywords

  • Iridium
  • Magnetism
  • Metal-insulator transition
  • Pyrochlore iridate
  • Valence state
  • Yttrium

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  • Cite this

    Angel, J., Asih, R., Nomura, H., Taniguchi, T., Matsuhira, K., Ramadhan, M. R., Ramli, I., Wakeshima, M., Hinatsu, Y., Mohamed-Ibrahim, M. I., Sulaiman, S., & Watanabe, I. (2019). Magnetic properties of hole-doped pyrochlore iridate (Y1-x-ycuxcay)2ir2o7. In B. Kurniawan, A. A. Nugroho, Darminto, I. Watanabe, & Risdiana (Eds.), Functional Properties of Modern Materials II (pp. 269-276). (Materials Science Forum; Vol. 966 MSF). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/MSF.966.269