Metallization of magnetite at high pressures

被引：36

作者：

Môri, N

Todo, S

Takeshita, N

Mori, T

Akishige, Y

机构：

[1] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan

[2] Saitama Univ, Dept Phys, Urawa, Saitama 3388570, Japan

[3] Joint Res Ctr Atom Technol, Tsukuba, Ibaraki 3040046, Japan

[4] Shimane Univ, Matsue, Shimane 690, Japan

来源：

PHYSICA B-CONDENSED MATTER | 2002年 / 312卷

关键词：

magnetite; Verwey transition; insulator-metal transition; pressure;

D O I：

10.1016/S0921-4526(01)01525-3

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We report on the first finding that an insulator to metal transition (i.e. Verwey transition) of magnetite (Fe3O4) lakes place at absolute zero temperature as a function of pressure. In order to investigate the Verwey transition, we measured the electrical resistivity on two single crystalline samples with distinct oxygen compositions of Fe3O4.002 and Fe3O4.007 at temperatures from 300K down to 3 K under a pressure up to 9 GPa using a cubic anvil apparatus. The Verwey transition temperature of these samples suddenly disappears at a certain critical pressure P-c in between 6 and 8 GPa. We confirmed that a metallic ground state is realized in magnetite under pressure above P-c. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：686 / 690

页数：5

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