Structural behavior of non-oxide perovskite superconductor MgCNi3 at pressures up to 32 GPa

被引：17

作者：

Kumar, RS

Cornelius, AL ^{[1
]}

Shen, YR

Kumary, TG

Janaki, J

Valsakumar, MC

Nicol, MF

机构：

[1] Univ Nevada, Dept Phys, Las Vegas, NV 89154 USA

[2] IGCAR, Mat Sci Div, Kalpakkam, Tamil Nadu, India

来源：

PHYSICA B-CONDENSED MATTER | 2005年 / 363卷 / 1-4期

关键词：

pressure; MgCNi3; superconductivity; bulk modulus;

D O I：

10.1016/j.physb.2005.03.020

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We report the pressure dependence of the structural parameters of the non-oxide perovskite superconductor MgCNi3 up to 32 GPa using a diamond anvil cell and synchrotron X-rays at room temperature. The structure of the compound remains in the Pm-3m cubic symmetry throughout the pressure range. The bulk modulus B-0 = 156.9 +/- 0.2 GPa with B-0' = 9.8 obtained by fitting the pressure-volume data is in good agreement with theoretical calculations reported earlier. An anomalous shift of the (1 1 1) and (2 0 0) lines observed above 9 GPa indicates a possible local short range distortion that is consistent with earlier studies. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：190 / 195

页数：6

共 25 条

[1] THE EFFECT OF PRESSURE ON THE CRYSTAL-STRUCTURES OF SOME BISMUTH-BASED SUPERCONDUCTORS [J].

AKHTAR, ZN ;

AKHTAR, MJ ;

CLARK, SM ;

CATLOW, CRA .

SOLID STATE COMMUNICATIONS, 1994, 92 (06) :535-540

[2] Structural distortion in superconducting Ba1-xKxBiO3 [J].

Braden, M ;

Reichardt, W ;

Elkaim, E ;

Lauriat, JP ;

Shiryaev, S ;

Barilo, SN .

PHYSICAL REVIEW B, 2000, 62 (10) :6708-6715

[3] Pressure dependence of the superconducting transition temperature of MgCNi3 [J].

Garbarino, G ;

Monteverde, M ;

Núñez-Regueiro, M ;

Acha, C ;

Weht, R ;

He, T ;

Regan, KA ;

Rogado, N ;

Hayward, M ;

Cava, RJ .

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2004, 408 :754-755

[4] CALIBRATION AND CORRECTION OF SPATIAL DISTORTIONS IN 2D DETECTOR SYSTEMS [J].

HAMMERSLEY, AP ;

SVENSSON, SO ;

THOMPSON, A .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1994, 346 (1-2) :312-321

[5] Superconductivity in the non-oxide perovskite MgCNi3 [J].

He, T ;

Huang, Q ;

Ramirez, AP ;

Wang, Y ;

Regan, KA ;

Rogado, N ;

Hayward, MA ;

Haas, MK ;

Slusky, JS ;

Inumara, K ;

Zandbergen, HW ;

Ong, NP ;

Cava, RJ .

NATURE, 2001, 411 (6833) :54-56

[6]

Howard CJ., 1998, RES LAB, V1, P27

[7] Temperature dependence of the structural parameters of the non-oxide perovskite superconductor MgCNi3 [J].

Huang, Q ;

He, T ;

Regan, KA ;

Rogado, N ;

Hayward, M ;

Haas, MK ;

Inumaru, K ;

Cava, RJ .

PHYSICA C, 2001, 363 (04) :215-218

[8] Observation of a low-symmetry crystal structure for superconducting MgCNi3 by NiK-edge x-ray absorption measurements -: art. no. 064509 [J].

Ignatov, AY ;

Dieng, LM ;

Tyson, TA ;

He, T ;

Cava, RJ .

PHYSICAL REVIEW B, 2003, 67 (06)

[9] Noncubic layered structure of Ba1-xKxBiO3 superconductor -: art. no. 140501 [J].

Klinkova, LA ;

Uchida, M ;

Matsui, Y ;

Nikolaichik, VI ;

Barkovskii, NV .

PHYSICAL REVIEW B, 2003, 67 (14)

[10] Normal and superconducting states of MgCNi3 upon Fe and Co substitution and external pressure -: art. no. 064510 [J].

Kumary, TG ;

Janaki, J ;

Mani, A ;

Jaya, SM ;

Sastry, VS ;

Hariharan, Y ;

Radhakrishnan, TS ;

Valsakumar, MC .

PHYSICAL REVIEW B, 2002, 66 (06) :1-9

← 1 2 3 →