X-ray diffuse scattering study of local distortions in Fe<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow /><mml:mrow><mml:mn>1</mml:mn><mml:mo>+</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>Te induced by excess Fe

Liu, X.; Lee, Chi-Cheng; Xu, Zhijun; Wen, Jinsheng; Gu, Genda; Ku, Wei; Tranquada, J. M.; Hill, J. P.

doi:10.1103/physrevb.83.184523

Cited by 28 publications

(31 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Besides magnetic effects, x-ray experiments for x = 0 showed strong diffuse scattering indicative of strong local distortions caused by the excess Fe [122]. We note that these materials show strong coupling between magnetism and structure, as seen for example in the strong lattice distortions upon or preceding magnetic order [2], and so these structural distortions may be important for understanding the interplay between the excess Fe and the magnetism of the Fe planes.…”

Section: Iron Chalcogenides: Similarities and Differences From The Pnmentioning

confidence: 99%

Superconductivity and magnetism in 11-structure iron chalcogenides in relation to the iron pnictides

Singh

2012

Science and Technology of Advanced Materials

View full text Add to dashboard Cite

This is a review of the magnetism and superconductivity in '11'-type Fe chalcogenides, as compared to the Fe-pnictide materials. The chalcogenides show many differences from the pnictides, as might be anticipated from their very varied chemistries. These differences include stronger renormalizations that might imply stronger correlation effects as well as different magnetic ordering patterns. Nevertheless the superconducting state and mechanism for superconductivity are apparently similar for the two classes of materials. Unanswered questions and challenges to theory are emphasized.

show abstract

Section: Iron Chalcogenides: Similarities and Differences From The Pnmentioning

confidence: 99%

Superconductivity and magnetism in 11-structure iron chalcogenides in relation to the iron pnictides

Singh

2012

Science and Technology of Advanced Materials

View full text Add to dashboard Cite

show abstract

“…For nearly stoichiometric Fe 1+x Te a distorted monoclinic structure and a commensurate antiferromagnetic order in the ab-plane was observed at low temperatures. In contrast, at a high amount of excess Fe the value of T N decreases, and the magnetic order changes to an incommensurate antiferromagnetic one [16,17].…”

mentioning

confidence: 92%

Pressure-induced ferromagnetism in antiferromagnetic Fe1.03Te

et al. 2013

View full text Add to dashboard Cite

The magnetic properties of Fe1.03Te under hydrostatic pressure up to p 5.7 GPa were investigated by means of muon spin rotation, dc magnetization, and neutron depolarization measurements. With increasing pressure the antiferromagnetic ordering temperature TN decreases continuously from 70 K at ambient pressure towards higher pressures. Surprisingly, the commensurate antiferromagnetic order of FeTe enters a region of incommensurate and dynamical magnetic order before at p 1.7 GPa the system turns ferromagnetic. The ferromagnetic ordering temperature TC increases with increasing pressure.

show abstract

“…Crystallographic stability is improved if some amount of extra Fe atoms is incorporated between the layers, which has important consequences for the low-temperature phases observed in the Fe 1+y Te series, 0.02 < y < 0.18. [6][7][8][9][10][11] Similarly to the cuprate and the ferropnictide HTSC families, the end member Fe 1+y Te has a magnetically ordered ground state and undergoes a structural distortion, which lowers the high-temperature tetragonal (HTT) lattice symmetry. [12][13][14] The physics behind these low-temperature phases and their relation to the superconductivity are of great interest and have been the subjects of intense study.…”

Section: Introductionmentioning

confidence: 99%

Continuous magnetic and structural phase transitions in Fe1+yTe

Zaliznyak

Wen

et al. 2012

Phys. Rev. B

Self Cite

View full text Add to dashboard Cite

We report a sequence of continuous phase transformations in iron telluride, Fe1+yTe (y~0.1), which is observed by combining neutron diffraction, magnetic susceptibility, and specific heat measurements on single crystal samples. While a gradual increase of magnetic scattering near the wave vector (0.5, 0, 0.5) is seen below T = 70 K, a temperature where the discontinuous first order magneto-structural phase transition is found in systems with small y (< 0.06), the reduction of the lattice symmetry in Fe1.1Te only occurs at Ts = 63 K. Below TN = 57.5 K the long-range magnetic order develops, whose incommensurate wave vector Qm varies with temperature. Finally, at Tm ~ 45 K the system enters the low-T phase, where Qm is locked at (0.48, 0, 0.5). We conclude that these instabilities are weak compared to the strength of the underlying interactions, and we suggest that the impact of the Fe interstitials on the transitions can be treated with random-field models.Comment: revised resubmission, 8 pages, 5 figure

show abstract

X-ray diffuse scattering study of local distortions in Fe1+xTe induced by excess Fe

Cited by 28 publications

References 26 publications

Superconductivity and magnetism in 11-structure iron chalcogenides in relation to the iron pnictides

Superconductivity and magnetism in 11-structure iron chalcogenides in relation to the iron pnictides

Pressure-induced ferromagnetism in antiferromagnetic Fe1.03Te

Continuous magnetic and structural phase transitions in Fe1+yTe

Contact Info

Product

Resources

About