Magnetic and fermi surface properties of antiferromagnet EuCd11

Ai Nakamura, Yuichi Hiranaka, Taro Uejo, Tetsuya Takeuchi, Fuminori Honda, Hisatomo Harima, Kazuyuki Matsubayashi, Yoshiya Uwatoko, Masato Hedo, Takao Nakama, Yoshichika Onuki

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9 Citations (Scopus)

Abstract

We succeeded in growing a high-quality single crystal of EuCd11 with the BaCd11-type tetragonal structure by the Cd self-flux method, and measured the electrical resistivity, specific heat, magnetic susceptibility, magnetization, and de Haas-van Alphen (dHvA) oscillations, together with the electrical resistivity under high pressures up to 8 GPa. The antiferromagnetic ordering was confirmed to occur at the Néel temperature TN = 2.7 K, and the antiferromagnetic state was found to change into the field-induced ferromagnetic state with 7 μ; B/Eu above a critical field Hc ≃ 15 kOe for both the magnetic fields H ∥ [100] and [001], revealing a typical Eu-divalent antiferromagnet. Reflecting the large lattice parameters of a = 11.93Å and c = 7.682Å with the caged structure, where each Eu atom is surrounded by a polyhedron of 22 Cd atoms, the Brillouin zone and the corresponding Fermi surfaces are small in volume. The detected dHvA branches are well explained by the full potential linear augmented plane wave (FLAPW) energy band calculations for the non-4 f reference compound SrCd 11, revealing ellipsoidal Fermi surfaces with complicated concave and convex shapes. The present Eu-divalent electronic state is found to be robust against high pressures up to 8 GPa, and does not change into the Eu-trivalent state.

Original languageEnglish
Article number074714
Journaljournal of the physical society of japan
Volume83
Issue number7
DOIs
Publication statusPublished - 2014 Jul 15

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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