High-pressure structure of half-metallic CrO2

被引：45

作者：

Maddox, BR ^{[1
]}

Yoo, CS

Kasinathan, D

Pickett, WE

Scalettar, RT

机构：

[1] Univ Calif Davis, Davis, CA 95616 USA

[2] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA

来源：

PHYSICAL REVIEW B | 2006年 / 73卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.73.144111

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Evidence for a structural phase transition from rutile alpha-CrO2 phase I (P4(2)/mnm) to orthorhombic beta-CrO2 phase II (CaCl2-like, Pnnm) is presented using angle-resolved synchrotron x-ray diffraction and high-sensitivity confocal Raman spectroscopy. The transition to the CaCl2 structure, which appears to be second order, occurs at 12 +/- 3 GPa without any measurable discontinuity in volume, but is accompanied by an apparent increase in compressibility. Raman data are also presented to show further evidence for a second-order structural phase transition as well to demonstrate soft-mode behavior of the B-1g phonon mode.

引用

收藏

页数：9

相关论文

共 35 条

[1] The effect of pressure upon the elastic parameters of isotropic solids, according to Murnaghan's theory of finite strain [J].

Birch, F .

JOURNAL OF APPLIED PHYSICS, 1938, 9 (04) :279-288

[2] Structural studies of rutile-type metal dioxides [J].

Bolzan, AA ;

Fong, C ;

Kennedy, BJ ;

Howard, CJ .

ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE CRYSTAL ENGINEERING AND MATERIALS, 1997, 53 :373-380

[3] Equation of state and material property measurements of hydrogen isotopes at the high-pressure, high-temperature, insulator-metal transition [J].

Cauble, R ;

Celliers, PM ;

Collins, GW ;

da Silva, LB ;

Gold, DM ;

Foord, ME ;

Budil, KS ;

Wallace, RJ ;

Ng, A .

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2000, 127 (02) :267-273

[4] PRESSURE-INDUCED ELECTRONIC COLLAPSE AND STRUCTURAL CHANGES IN RARE-EARTH MONOCHALCOGENIDES [J].

CHATTERJEE, A ;

SINGH, AK .

PHYSICAL REVIEW B-SOLID STATE, 1972, 6 (06) :2285-+

[5] CLOSURE OF THE CHARGE-TRANSFER ENERGY-GAP AND METALLIZATION OF NII2 UNDER PRESSURE [J].

CHEN, AL ;

YU, PY ;

TAYLOR, RD .

PHYSICAL REVIEW LETTERS, 1993, 71 (24) :4011-4014

[6] X-RAY AND MAGNETIC STUDIES OF CRO2 SINGLE CRYSTALS [J].

CLOUD, WH ;

BABCOCK, KR ;

SCHREIBER, DS .

JOURNAL OF APPLIED PHYSICS, 1962, 33 (03) :1193-+

[7] Compressibility and phase transition of δ-UO3 under high pressure [J].

Dyuzheva, TI ;

Bendeliani, NA ;

Brazhkin, VV ;

Kuznetshov, LM .

JOURNAL OF ALLOYS AND COMPOUNDS, 2001, 315 (1-2) :59-61

[8] The high-pressure phase transition sequence from the rutile-type through to the cotunnite-type structure in PbO2 [J].

Haines, J ;

Leger, JM ;

Schulte, O .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1996, 8 (11) :1631-1646

[9] X-ray diffraction study of the phase transitions and structural evolution of tin dioxide at high pressure: Relationships between structure types and implications for other rutile-type dioxides [J].

Haines, J ;

Leger, JM .

PHYSICAL REVIEW B, 1997, 55 (17) :11144-11154

[10] 2ND-ORDER RUTILE-TYPE TO CACL2-TYPE PHASE-TRANSITION IN BETA-MNO2 AT HIGH-PRESSURE [J].

HAINES, J ;

LEGER, JM ;

HOYAU, S .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1995, 56 (07) :965-973

← 1 2 3 4 →