Measuring the Electrical Resistivity of Liquid Iron to 1.4 Mbar

被引：11

作者：

Ohta, Kenji ^{[1
]}

Suehiro, Sho ^{[1
]}

Kawaguchi, Saori I. ^{[2
]}

Okuda, Yoshiyuki ^{[1
,3
]}

Wakamatsu, Tatsuya ^{[1
]}

Hirose, Kei ^{[3
,4
]}

Ohishi, Yasuo ^{[2
]}

Kodama, Manabu ^{[5
]}

Hirai, Shuichiro ^{[5
]}

Azuma, Shintaro ^{[1
]}

机构：

[1] Tokyo Inst Technol, Dept Earth & Planetary Sci, Tokyo 1528551, Japan

[2] Japan Synchrotron Radiat Res Inst, SPring 8, Sayo, Hyogo 6795198, Japan

[3] Univ Tokyo, Dept Earth & Planetary Sci, Tokyo 1130033, Japan

[4] Tokyo Inst Technol, Earth Life Sci Inst, Tokyo 1528550, Japan

[5] Tokyo Inst Technol, Dept Mech Engn, Tokyo 1528551, Japan

来源：

PHYSICAL REVIEW LETTERS | 2023年 / 130卷 / 26期

关键词：

HIGH-PRESSURE IMPLICATIONS; FE-NI ALLOYS; THERMAL-CONDUCTIVITY; EARTHS CORE; THERMOPHYSICAL PROPERTIES; TRANSPORT-PROPERTIES; SOUND-VELOCITY; PLATINUM-GROUP; LIGHT-ELEMENT; HEAT-FLOW;

D O I：

10.1103/PhysRevLett.130.266301

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We determined the electrical resistivity of liquid Fe to 135 GPa and 6680 K using a four-probe method in a diamond-anvil cell combined with two novel techniques: (i) enclosing a molten Fe in a sapphire capsule, and (ii) millisecond time-resolved simultaneous measurements of the resistance, x-ray diffraction, and temperature of instantaneously melted Fe. Our results show the minimal temperature dependence of the resistivity of liquid Fe and its anomalous resistivity decrease around 50 GPa, likely associated with a gradual magnetic transition, both in agreement with previous ab initio calculations.

引用

页数：6

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