Evolution of the nuclear and magnetic structures of TlFe1.6Se2 with temperature

被引：13

作者：

Cao, Huibo ^{[1
]}

Cantoni, Claudia ^{[2
]}

May, Andrew F. ^{[2
]}

McGuire, Michael A. ^{[2
]}

Chakoumakos, Bryan C. ^{[1
]}

Pennycook, Stephen J. ^{[2
]}

Custelcean, Radu ^{[3
]}

Sefat, Athena S. ^{[2
]}

Sales, Brian C. ^{[2
]}

机构：

[1] Oak Ridge Natl Lab, Quantum Condensed Matter Div, Oak Ridge, TN 37831 USA

[2] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA

[3] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA

来源：

PHYSICAL REVIEW B | 2012年 / 85卷 / 05期

关键词：

NEUTRON; SUPERCONDUCTIVITY;

D O I：

10.1103/PhysRevB.85.054515

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The evolution of the nuclear and magnetic structures of TlFe1.6Se2 was determined in the temperature range 5-450 K using single-crystal neutron diffraction. The Fe layers in these materials develop a corrugation in the magnetically ordered state. A canting away from the block checkerboard magnetic structure is observed in the narrow temperature range between approximately 100 and 150 K. In this same temperature range, an increase in the corrugation of the Fe layers is observed. At lower temperatures, the block checkerboard magnetic structure is recovered with a suppressed magnetic moment and abrupt changes in the lattice parameters. Microstructure analysis at 300 K using atomic-resolution Z-contrast scanning transmission electron microscopy reveals regions with ordered and disordered Fe vacancies, and the iron content is found to be uniform across the crystal. These findings highlight the differences between the alkali-metal and thallium materials, and indicate competition between magnetic ground states and a strong coupling of magnetism to the lattice in TlFe1.6Se2.

引用

页数：6

共 23 条

[11] Vacancy-driven orbital and magnetic order in (K,Tl,Cs)yFe2-xSe2 [J].

Lv, Weicheng ;

Lee, Wei-Cheng ;

Phillips, Philip .

PHYSICAL REVIEW B, 2011, 84 (15)

[12] Magnetic Resonant Mode in the Low-Energy Spin-Excitation Spectrum of Superconducting Rb2Fe4Se5 Single Crystals [J].

Park, J. T. ;

Friemel, G. ;

Li, Yuan ;

Kim, J. -H. ;

Tsurkan, V. ;

Deisenhofer, J. ;

von Nidda, H. -A. Krug ;

Loidl, A. ;

Ivanov, A. ;

Keimer, B. ;

Inosov, D. S. .

PHYSICAL REVIEW LETTERS, 2011, 107 (17)

[13] Nanoscale phase separation in the iron chalcogenide superconductor K0.8Fe1.6Se2 as seen via scanning nanofocused x-ray diffraction [J].

Ricci, A. ;

Poccia, N. ;

Campi, G. ;

Joseph, B. ;

Arrighetti, G. ;

Barba, L. ;

Reynolds, M. ;

Burghammer, M. ;

Takeya, H. ;

Mizuguchi, Y. ;

Takano, Y. ;

Colapietro, M. ;

Saini, N. L. ;

Bianconi, A. .

PHYSICAL REVIEW B, 2011, 84 (06)

[14] RECENT ADVANCES IN MAGNETIC-STRUCTURE DETERMINATION BY NEUTRON POWDER DIFFRACTION [J].

RODRIGUEZCARVAJAL, J .

PHYSICA B, 1993, 192 (1-2) :55-69

[15] A NEUTRON AND MOSSBAUER STUDY OF TIFEXS2 COMPOUNDS [J].

SABROWSKY, H ;

ROSENBERG, M ;

WELZ, D ;

DEPPE, P ;

SCHAFER, W .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1986, 54-7 :1497-1498

[16] Unusual phase transitions and magnetoelastic coupling in TlFe1.6Se2 single crystals [J].

Sales, Brian C. ;

McGuire, Michael A. ;

May, Andrew F. ;

Cao, Huibo ;

Chakoumakos, Bryan C. ;

Sefat, Athena S. .

PHYSICAL REVIEW B, 2011, 83 (22)

[17] Phase transition, superstructure and physical properties of K2Fe4Se5 [J].

Song, Y. J. ;

Wang, Z. ;

Wang, Z. W. ;

Shi, H. L. ;

Chen, Z. ;

Tian, H. F. ;

Chen, G. F. ;

Yang, H. X. ;

Li, J. Q. .

EPL, 2011, 95 (03)

[18] Superconductivity at 32 K in single-crystalline RbxFe2-ySe2 [J].

Wang, A. F. ;

Ying, J. J. ;

Yan, Y. J. ;

Liu, R. H. ;

Luo, X. G. ;

Li, Z. Y. ;

Wang, X. F. ;

Zhang, M. ;

Ye, G. J. ;

Cheng, P. ;

Xiang, Z. J. ;

Chen, X. H. .

PHYSICAL REVIEW B, 2011, 83 (06)

[19] Microstructure and ordering of iron vacancies in the superconductor system KyFexSe2 as seen via transmission electron microscopy [J].

Wang, Z. ;

Song, Y. J. ;

Shi, H. L. ;

Wang, Z. W. ;

Chen, Z. ;

Tian, H. F. ;

Chen, G. F. ;

Guo, J. G. ;

Yang, H. X. ;

Li, J. Q. .

PHYSICAL REVIEW B, 2011, 83 (14)

[20] Common Crystalline and Magnetic Structure of Superconducting A2Fe4Se5 (A = K, Rb, Cs, Tl) Single Crystals Measured Using Neutron Diffraction [J].

Ye, F. ;

Chi, S. ;

Bao, Wei ;

Wang, X. F. ;

Ying, J. J. ;

Chen, X. H. ;

Wang, H. D. ;

Dong, C. H. ;

Fang, Minghu .

PHYSICAL REVIEW LETTERS, 2011, 107 (13)

← 1 2 3 →