Tuning Magnetic and Transport Properties in Quasi-2D (Mn1−xNix)2P2S6 Single Crystals

We report an optimized chemical vapor transport method to grow single crystals of (Mn1−xNix)2P2S6 where x = 0, 0.3, 0.5, 0.7, and 1. Single crystals up to 4 mm × 3 mm × 200 μm were obtained by this method. As-grown crystals are characterized by means of scanning electron microscopy and powder X-ray diffraction measurements. The structural characterization shows that all crystals crystallize in monoclinic symmetry with the space group C2/m (No. 12). We have further investigated the magnetic properties of this series of single crystals. The magnetic measurements of the all as-grown single crystals show long-range antiferromagnetic order along all principal crystallographic axes. Overall, the Néel temperature TN is non-monotonous; with increasing Ni2+ doping, the temperature of the antiferromagnetic phase transition first decreases from 80 K for pristine Mn2P2S6 (x = 0) up to x = 0.5 and then increases again to 155 K for pure Ni2P2S6 (x = 1). The magnetic anisotropy switches from out-of-plane to in-plane as a function of composition in (Mn1−xNix)2P2S6 series. Transport studies under hydrostatic pressure on the parent compound Mn2P2S6 evidence an insulator-metal transition at an applied critical pressure of ~22 GPa.

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Anisotropic Optical Response of WTe2 Single Crystals Studied by Ellipsometric Analysis

Nanomaterials ◽

10.3390/nano11092262 ◽

2021 ◽

Vol 11 (9) ◽

pp. 2262

Author(s):

Krastyo Buchkov ◽

Rosen Todorov ◽

Penka Terziyska ◽

Marin Gospodinov ◽

Velichka Strijkova ◽

...

Keyword(s):

Single Crystals ◽

Chemical Vapor ◽

Physical Nature ◽

High Refractive Index ◽

Growth Conditions ◽

Chemical Vapor Transport ◽

Light Modulation ◽

X Ray Diffraction ◽

Low Loss ◽

Index Value

In this paper we report the crystal growth conditions and optical anisotropy properties of Tungsten ditelluride (WTe2) single crystals. The chemical vapor transport (CVT) method was used for the synthesis of large WTe2 crystals with high crystallinity and surface quality. These were structurally and morphologically characterized by means of X-ray diffraction, optical profilometry and Raman spectroscopy. Through spectroscopic ellipsometry analysis, based on the Tauc–Lorentz model, we identified a high refractive index value (~4) and distinct tri-axial anisotropic behavior of the optical constants, which opens prospects for surface plasmon activity, revealed by the dielectric function. The anisotropic physical nature of WTe2 shows practical potential for low-loss light modulation at the 2D nanoscale level.

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Magnetic ordering in relaxor ferroelectric (1 − x)Pb(Fe2/3W1/3)O3–xPbTiO3 single crystals

Journal of Materials Research ◽

10.1557/jmr.2007.0265 ◽

2007 ◽

Vol 22 (8) ◽

pp. 2116-2124 ◽

Cited By ~ 11

Author(s):

Li Feng ◽

Haiyan Guo ◽

Zuo-Guang Ye

Keyword(s):

Single Crystals ◽

Magnetic Measurements ◽

Ferroelectric Properties ◽

Magnetic Ordering ◽

Magnetic Behavior ◽

Relaxor Ferroelectric ◽

X Ray Diffraction ◽

Ferroelectric State ◽

Temperature Changes ◽

Temperature Solution

Single crystals of the perovskite solid solution (1 − x)Pb(Fe2/3W1/3)O3–xPbTiO3, with x = 0, 0.07, 0.27, and 0.75, have been synthesized by the high-temperature solution growth using PbO as flux and characterized by x-ray diffraction and dielectric and magnetic measurements. The crystal structure at room temperature changes from a pseudocubic to a tetragonal phase with the PbTiO3 (PT) content increasing to x ⩾ 0.27. As the amount of PT increases, the relaxor ferroelectric behavior of Pb(Fe2/3W1/3)O3 (PFW) is transformed toward a normal ferroelectric state with sharp and nondispersive peaks of dielectric permittivity at TC. Two types of magnetic orderings are observed on the temperature dependence of the magnetization in the crystals with x ⩽ 0.27. This behavior is explained based on the relationships among the magnetic ordering, perovskite structure, composition, and relaxor ferroelectric properties. Furthermore, the macroscopic magnetization of the system was measured under the application of a magnetic field, which demonstrates different magnetic behavior associated with the weakly ferromagnetic, antiferromagnetic, and paramagnetic ordering in the temperature range of 2 to 390 K. Interestingly, the low-temperature ferromagnetism is enhanced by the addition of ferroelectric PT up to x = 0.27.

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Temperature dependent photoluminescence studies of ZnSe:I single crystals grown by chemical vapor transport

Pramana ◽

10.1007/bf02847299 ◽

1996 ◽

Vol 47 (2) ◽

pp. 133-143 ◽

Cited By ~ 6

Author(s):

Suruchi Anand ◽

Prabhat Verma ◽

S C Abbi ◽

K P Jain ◽

M J Tafreshi ◽

...

Keyword(s):

Single Crystals ◽

Chemical Vapor ◽

Vapor Transport ◽

Chemical Vapor Transport ◽

Temperature Dependent ◽

Photoluminescence Studies ◽

Temperature Dependent Photoluminescence

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ChemInform Abstract: Growth of Cu1-xGaxCr2Se4 Single Crystals by Chemical Vapor Transport and Their Electrical Properties.

ChemInform ◽

10.1002/chin.199301018 ◽

2010 ◽

Vol 24 (1) ◽

pp. no-no

Author(s):

I. OKONSKA-KOZLOWSKA ◽

J. KOPYCZOK ◽

K. WOKULSKA ◽

J. KAMMEL

Keyword(s):

Electrical Properties ◽

Single Crystals ◽

Chemical Vapor ◽

Vapor Transport ◽

Chemical Vapor Transport

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Uniform Tellurium Doping in Black Phosphorus Single Crystals by Chemical Vapor Transport

Inorganic Chemistry ◽

10.1021/acs.inorgchem.8b00278 ◽

2018 ◽

Vol 57 (7) ◽

pp. 4098-4103 ◽

Cited By ~ 25

Author(s):

Ziming Zhang ◽

Muhammad Khurram ◽

Zhaojian Sun ◽

Qingfeng Yan

Keyword(s):

Single Crystals ◽

Chemical Vapor ◽

Black Phosphorus ◽

Vapor Transport ◽

Chemical Vapor Transport ◽

Tellurium Doping

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Gas-pressure chemical vapor transport growth of millimeter-sized c-BAs single crystals with moderate thermal conductivity

Applied Physics Letters ◽

10.1063/1.5034787 ◽

2018 ◽

Vol 112 (24) ◽

pp. 241903 ◽

Cited By ~ 11

Author(s):

Jie Xing ◽

Evan R. Glaser ◽

Bai Song ◽

James C. Culbertson ◽

Jaime A. Freitas ◽

...

Keyword(s):

Thermal Conductivity ◽

Single Crystals ◽

Chemical Vapor ◽

Gas Pressure ◽

Vapor Transport ◽

Chemical Vapor Transport ◽

Pressure Chemical

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Photoluminescence of Yb3+-doped CuInS2 single crystals prepared by In-flux and chemical vapor transport methods

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2005.01.103 ◽

2006 ◽

Vol 408-412 ◽

pp. 791-795 ◽

Cited By ~ 6

Author(s):

N. Tsujii ◽

Y. Imanaka ◽

T. Takamasu ◽

H. Kitazawa ◽

G. Kido

Keyword(s):

Single Crystals ◽

Chemical Vapor ◽

Vapor Transport ◽

Chemical Vapor Transport

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Preparation of Plate-Like Bulk Beta Iron-Disilicide Crystals Using Metal to Semiconductor Phase Transition by Heat Treatment

MRS Proceedings ◽

10.1557/proc-749-w11.1 ◽

2002 ◽

Vol 749 ◽

Author(s):

Masato Osamura ◽

Hidetaka Ishihara ◽

Zhengxin Liu ◽

Hisao Tanoue ◽

Shirou. Sakuragi ◽

...

Keyword(s):

Chemical Vapor ◽

Chemical Vapor Transport ◽

Annealing Duration ◽

Bulk Crystals ◽

X Ray Diffraction ◽

X Ray ◽

Flat Surfaces ◽

The Matrix ◽

The Mean ◽

Micro Analysis

ABSTRACTPlate-like β-FeSi2 bulk crystals with size of 10×10 mm2 and thickness of 1 mm were fabricated by annealing CVT (chemical vapor transport)-grown plate-like α-Fe2Si5 at 800°C in Ar atmosphere. Before annealing, α-Fe2Si5 crystals were characterized by x-ray diffraction (XRD) and scanning electron microscopy (SEM) to be single crystals with flat surfaces. XRD measurements of β-FeSi2 crystals subjected to annealing showed that they had a po lycrystalline structure. The mean Fe/Si co mposit ion rat io of β-FeSi2 crystal measured by energy dispersive x-ray spectroscopy (EDX) was 31/69 and it was the same as that of α-Fe2Si5 bulk crystal before annealing. SEM, Raman scattering and electron probe micro-analysis (EPMA) measurements identified that there existed small Si precipitates mixed in the matrix of β-FeSi2 crystals. At annealing temperature of 800°C, the plate-like β-FeSi2 bulk was obtained even the annealing duration time was as short as 5 hours.

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