Giant nonlinear conduction and thyristor-like negative differential resistance in BaIrO3 single crystals

Tomohito Nakano and Ichiro Terasaki
Phys. Rev. B 73, 195106 – Published 4 May 2006

Abstract

We synthesized single-crystalline samples of monoclinic BaIrO3 using a molten flux method, and measured their magnetization, resistivity, Seebeck coefficient, and nonlinear voltage-current characteristics. The magnetization rapidly increases below the ferromagnetic transition temperature TC of 180K, where the resistivity concomitantly shows a hump-type anomaly, followed by a sharp increase below 30K. The Seebeck coefficient suddenly increases below TC, and shows linear temperature dependence below 50K. A most striking feature of this compound is that the anomalously giant nonlinear conduction is observed below 30K, where a small current density of 20Acm2 dramatically suppresses the sharp increase in resistivity to induce a metallic conduction down to 4K.

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  • Received 5 September 2005

DOI:https://doi.org/10.1103/PhysRevB.73.195106

©2006 American Physical Society

Authors & Affiliations

Tomohito Nakano* and Ichiro Terasaki

  • Department of Applied Physics, Waseda University, 3-4-1 Okubo Shinjuku-ku Tokyo 169-8555, Japan and CREST, Japan Science and Technology Agency, Kawaguchi, Saitama 332-0012, Japan

  • *FAX: +81-3-5286-3854. Email address: nakano@htsc.sci.waseda.ac.jp.
  • FAX: +81-3-5286-3854. Email address: terra@waseda.jp.

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Issue

Vol. 73, Iss. 19 — 15 May 2006

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