Interplay between quantum criticality and geometric frustration in Fe 3Mo3N with stella quadrangula lattice

T. Waki, S. Terazawa, Teruo Yamazaki, Y. Tabata, K. Sato, A. Kondo, K. Kindo, M. Yokoyama, Y. Takahashi, H. Nakamura

Research output: Contribution to journalArticle

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Abstract

We propose the η-carbide-type correlated-electron metal Fe 3Mo3N as a new candidate for testing geometric frustration in itinerant-electron magnets. In this compound, ferromagnetism is abruptly induced from a non-magnetic non-Fermi-liquid ground state either when a magnetic field (∼14 T) applied to it or when it is doped with a slight amount of impurity (∼5% Co). We observed a peak in the paramagnetic neutron scattering intensity at finite wave vectors, revealing the presence of the antiferromagnetic correlation hidden in the magnetic measurements. It causes a new type of geometric frustration in the stella quadrangula (SQ) lattice of the Fe sublattice, which is a corner-shared lattice of two nested regular tetrahedrons. Although the SQ lattice is one of pyrochlore-derived lattices, we anticipate the unique nature of the frustration due to the competition between first- and second-neighbour interactions, J1 and J2, possibly of direct exchange type. We propose that the frustrated antiferromagnetic correlation suppresses the ferromagnetic correlation to its marginal point and is therefore responsible for the origin of the ferromagnetic quantum critical behaviour in pure Fe3Mo3N.

Original languageEnglish
Article number37004
JournalEPL
Volume94
Issue number3
DOIs
Publication statusPublished - 2011 May 1
Externally publishedYes

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frustration
tetrahedrons
carbides
sublattices
ferromagnetism
magnetic measurement
neutron scattering
electrons
magnets
impurities
ground state
causes
liquids
magnetic fields
metals
interactions

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Waki, T., Terazawa, S., Yamazaki, T., Tabata, Y., Sato, K., Kondo, A., ... Nakamura, H. (2011). Interplay between quantum criticality and geometric frustration in Fe 3Mo3N with stella quadrangula lattice. EPL, 94(3), [37004]. https://doi.org/10.1209/0295-5075/94/37004

Interplay between quantum criticality and geometric frustration in Fe 3Mo3N with stella quadrangula lattice. / Waki, T.; Terazawa, S.; Yamazaki, Teruo; Tabata, Y.; Sato, K.; Kondo, A.; Kindo, K.; Yokoyama, M.; Takahashi, Y.; Nakamura, H.

In: EPL, Vol. 94, No. 3, 37004, 01.05.2011.

Research output: Contribution to journalArticle

Waki, T, Terazawa, S, Yamazaki, T, Tabata, Y, Sato, K, Kondo, A, Kindo, K, Yokoyama, M, Takahashi, Y & Nakamura, H 2011, 'Interplay between quantum criticality and geometric frustration in Fe 3Mo3N with stella quadrangula lattice', EPL, vol. 94, no. 3, 37004. https://doi.org/10.1209/0295-5075/94/37004
Waki, T. ; Terazawa, S. ; Yamazaki, Teruo ; Tabata, Y. ; Sato, K. ; Kondo, A. ; Kindo, K. ; Yokoyama, M. ; Takahashi, Y. ; Nakamura, H. / Interplay between quantum criticality and geometric frustration in Fe 3Mo3N with stella quadrangula lattice. In: EPL. 2011 ; Vol. 94, No. 3.
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