Muon Irradiation of ZnO Rods: Superparamagnetic Nature Induced by Defects

In this work, through a combination of photoluminescence spectroscopy, X-ray powder diffraction and magnetic measurements, it is determined that ZnO rods, made hydrothermally using a combination of magnetic field with respect to the force of gravity, exhibit superparamagnetic properties which emerge from Zn defects. These Zn defects result in a size-dependent superparamagnetic property of the rods. Red emissions, characteristic of Zn vacancies, and magnetic susceptibility both increased with decreasing rod size. The ZnO rods have significantly larger superparamagnetic cluster sizes (one order of magnitude) and lower fluctuation rates when compared to other superparamagnetic particles.

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INFLUENCE OF THE PREPARATION CONDITIONS AND THERMAL TREATMENT ON THE STRUCTURE OF THE B2O3-BaO-Fe2O3 SYSTEM

International Journal of Modern Physics B ◽

10.1142/s0217979205029535 ◽

2005 ◽

Vol 19 (10) ◽

pp. 1821-1834 ◽

Cited By ~ 3

Author(s):

DORINA RUSU ◽

M. F. CARRASCO ◽

MONICA TODERAS ◽

I. ARDELEAN

Keyword(s):

Magnetic Field ◽

Magnetic Susceptibility ◽

Thermal Treatment ◽

Optical Microscopy ◽

Magnetic Measurements ◽

Iron Ions ◽

X Ray Diffraction ◽

X Ray ◽

Preparation Conditions ◽

Cooling Method

The structure of x Fe 2 O 3·(100-x)[3 B 2 O 3· BaO ] system with 0≤x≤50 mol % was studied by DTA, X-ray diffraction, density, optical microscopy and EPR measurements in vitreous and partial crystallized state, the samples being obtained by under cooling method. The data obtained show that, by melting the samples at Te = 1200°C or Te = 1250° C , glasses for x≤35 mol % were obtained, and the forming of crystalline microprecipitates of Fe 2 O 3 in the sample with x = 50 mol %. It was also established that the thermal treatment at 565°C without and in the presence of magnetic field of 0.7 T is influencing the forming and the development of the Fe 2 O 3 microcrystals in samples with x≥35 mol %. The samples melted at Tc = 1200° C and Tc = 1250° C were studied by magnetic susceptibility measurements which evidenced similar results with those obtained by EPR. Also, the magnetic measurements show that for the thermal untreated samples the iron ions participate at superexchange interactions for x≥5 mol % and for x≥10 mol %, respectively.

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Interaction of ditertiary phosphines with phenyl- and 1-naphthyldithiocarbamatonickel(II)

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19851383 ◽

1985 ◽

Vol 50 (6) ◽

pp. 1383-1390

Author(s):

Aref A. M. Aly ◽

Ahmed A. Mohamed ◽

Mahmoud A. Mousa ◽

Mohamed El-Shabasy

Keyword(s):

Thermal Analysis ◽

Powder Diffraction ◽

Spin Structure ◽

Magnetic Measurements ◽

Mixed Ligand ◽

Mixed Ligand Complexes ◽

X Ray ◽

Square Planar

The synthesis of the following mixed ligand complexes is reported: [Ni(phdtc)2(dpm)2], [Ni(phdtc)2(dpe)2], [Ni(phdtc)2(dpp)3], [Ni(1-naphdtc)2(dpm)2], [Ni(1-naphdtc)2], and [Ni(1-naphdtc)2(dpp)2], where phdtc = PhNHCSS-, 1-naphdtc = 1-NaPhNHCSS-, dpm = Ph2PCH2PPh2, dpe = Ph2P(CH2)2PPh2, and dpp = Ph2P(CH2)3PPh2. The complexes are characterised by microanalysis, IR and UV-Vis spectra, magnetic measurements, conductivity, X-ray powder diffraction, and thermal analysis. All the mixed ligand complexes are diamagnetic, and thus a square-planar or square-pyramidal (low-spin) structure was proposed for the present complexes.

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Cobalt(II) Mercury Tetrathiocyanate Complexes with Lewis Bases

Canadian Journal of Chemistry ◽

10.1139/v73-065 ◽

1973 ◽

Vol 51 (3) ◽

pp. 438-447 ◽

Cited By ~ 42

Author(s):

R. Makhija ◽

L. Pazdernik ◽

R. Rivest

Keyword(s):

Magnetic Susceptibility ◽

Powder Diffraction ◽

Elemental Analysis ◽

Far Infrared ◽

Crystalline Solid ◽

Ultraviolet Spectroscopy ◽

X Ray ◽

Lewis Bases ◽

Polydentate Ligands

A new series of octahedral cobalt(II) complexes are formed when CoX2(X = Cl, Br, I, SCN) reacts with Hg(SCN)2 in the presence of Lewis bases. These complexes of stoichiometry CoHg(SCN)4•2L (L = THF, dioxane, pyridine, aniline) are pink to violet solids which slowly decompose to the blue crystalline solid, CoHg(SCN)4, the stable magnetic susceptibility standard. On further reaction of CoHg(SCN)4•2THF with mono-, bi-, and polydentate ligands in dry ethanol, complexes of the following types are obtained: CoHg(SCN)4•2L (L = PΦ3), CoHg(SCN)4•2LL (LL = trien), CoHg(SCN)4•3LL (LL = en, bipy), and CoHg(SCN)4•4LL (LL = phen). The stoichiometry of these were determined by elemental analysis. Possible structures of these are discussed with the help of mid and far infrared, visible, and ultraviolet spectroscopy, magnetic susceptibility, and X-ray powder diffraction. Some new i.r. bands like Co—P, Co—N, and Hg—S are assigned in the low region.

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Synthesis, Structure, and Characterization of La1−xBax (0 ≤ x ≤ 1)

MRS Proceedings ◽

10.1557/proc-271-107 ◽

1992 ◽

Vol 271 ◽

Author(s):

Joseph E. Sunstrom ◽

Susan M. Kauzlarich

Keyword(s):

Magnetic Susceptibility ◽

Powder Diffraction ◽

Single Phase ◽

Gravimetric Analysis ◽

Thermal Gravimetric ◽

Temperature Dependent ◽

X Ray ◽

Early Transition Metal ◽

Arc Melting

ABSTRACTThe compounds La1−xBaxTiO3 (0 ≤ × ≤ 1) have been prepared by arc melting stoichiometric amounts of LaTiO3 and BaTiO3. Single phase samples can be made for the entire stoichiometry range. The polycrystalline samples have been characterized by thermal gravimetric analysis, X-ray powder diffraction, and temperature dependent magnetic susceptibility. This series of compounds has been studied as a possible candidate for an early transition metal superconductor.

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Ferromagnetic interactions in a dicyanamide-bridged multinuclear metal-organic framework [Pr3NH]+ [Mn(dca)3]−·H2O

Zeitschrift für Naturforschung B ◽

10.1515/znb-2019-0015 ◽

2019 ◽

Vol 74 (6) ◽

pp. 485-489

Author(s):

Yuan Huang ◽

Xiu-feng Yu ◽

Zhen Rong ◽

Yi-chun Ai ◽

Kun Qian ◽

...

Keyword(s):

Magnetic Susceptibility ◽

Magnetic Measurements ◽

Metal Organic Framework ◽

Three Dimensional ◽

X Ray Diffraction ◽

Magnetic Susceptibility Data ◽

X Ray ◽

Susceptibility Data ◽

Metal Organic ◽

Ferromagnetic Interactions

AbstractA new complex [Pr3NH]+ [Mn(dca)3]− · H2O (dicyanamide = dca−) was synthesized, in which the Mn2+ cations are bridged by end-to-end dca anions to form three-dimensional [Mn(dca)3]nn− networks and tripropylammonium cations reside in the cavities of these networks. The complex has been characterized by single-crystal X-ray diffraction, infrared spectroscopy, elemental analysis, and magnetic measurements. Magnetic susceptibility data indicate ferromagnetic interactions among the MnII ions.

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Magnetic and Structural Properties of Ferrimagnetic Bioceramics

Materials Science Forum ◽

10.4028/www.scientific.net/msf.473-474.117 ◽

2005 ◽

Vol 473-474 ◽

pp. 117-122 ◽

Cited By ~ 1

Author(s):

A.C. Kis ◽

Th. Leventouri ◽

J.R. Thompson

Keyword(s):

Crystal Structure ◽

Heat Treatment ◽

Magnetic Properties ◽

Calcium Phosphate ◽

Powder Diffraction ◽

Magnetic Measurements ◽

Treatment Temperature ◽

Monoclinic Crystal ◽

X Ray ◽

Phase Development

Structure and magnetic properties of ferrimagnetic bioceramics in the system {0.45(CaO, P2O5) ySiO2 xFe2O3 0.03Na2O}, x=0.05, 0.10, 0.15, 0.20, were studied by x-ray powder diffraction and magnetic measurements. Magnetite and calcium phosphate, crystallizing in the hexagonal and monoclinic crystal systems, are the major phases in the compounds. Phase development, crystal structure, and magnetic properties of the composites are determined by the specific starting composition of oxides and the heat-treatment temperature.

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Suppression of X-Ray Fluorescence Background in X-Ray Powder Diffraction by a Mercuric Iodide Spectrometer

Advances in X-ray Analysis ◽

10.1154/s0376030800017213 ◽

1983 ◽

Vol 27 ◽

pp. 307-316

Author(s):

J. Nissenbaum ◽

A. Levi ◽

A. Burger ◽

M. Schieber ◽

Z. Burshtein

Keyword(s):

Powder Diffraction ◽

Energy Resolution ◽

Scintillation Counter ◽

Peak Height ◽

Maximum Energy ◽

Mercuric Iodide ◽

X Ray Diffraction ◽

X Ray ◽

Order Of Magnitude ◽

Diffraction Patterns

AbstractWe have explored the merits of using a Hgl2 spectrometer as a detector in x-ray diffraction systems instead of a proportional gas counter, or a scintillation counter. The full width at half maximum energy resolution of the HgI2 spectrometer used was about 1.1 keV for the CuKα line (8.1 keV), and about 1.5 keV for the MoKα line (17.4 keV), The energy resolution was utilised to eliminate x-ray fluorescence background from powder diffraction spectra. We demonstrate the suppression of Fe x-ray fluorescence in diffraction patterns of ErFe03 obtained with a Cu x-ray tube, and of Y x-ray fluorescence in diffraction patterns of Y2O3 obtained with a Mo x-ray tube. The peak height to background ratios were improved by about an order of magnitude in both cases.

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Synthesis and Characterization of T12Ba2CaCu2O8 and T12Ba2Ca2Cu3O10

MRS Proceedings ◽

10.1557/proc-169-357 ◽

1989 ◽

Vol 169 ◽

Author(s):

Lauren E. H. McMills ◽

Shu Li ◽

Zhen Zhang ◽

Martha Greenblatt

Keyword(s):

Magnetic Susceptibility ◽

Powder Diffraction ◽

Single Phase ◽

Synthesis And Characterization ◽

Synthetic Method ◽

Superconducting Properties ◽

X Ray ◽

Preparation Conditions ◽

The Relationship

AbstractSingle-phase samples of T12Ba2CaCu2O8 and T12Ba2Ca2Cu3O10 have been prepared using a reliable and simple synthetic method. Samples were characterized by x-ray powder diffraction, magnetic susceptibility and four probe resistivity methods. The TcR=0 values for T12Ba2CaCu2O8 ranged from 100 to 105K, whereas those for T12Ba2Ca2Cu3O10 ranged from 96 to 107K. The relationship between the superconducting properties and the various preparation conditions are discussed.

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Bulk Modulus of the YBaCuO Oxide Superconductor Obtained from Magnetic Measurements

MRS Proceedings ◽

10.1557/proc-169-1105 ◽

1989 ◽

Vol 169 ◽

Author(s):

Bokhimi

Keyword(s):

Magnetic Susceptibility ◽

Bulk Modulus ◽

Room Temperature ◽

Magnetic Measurements ◽

Oxygen Deficiency ◽

External Pressure ◽

Charge Carriers ◽

Oxide Superconductor ◽

Mechanical Measurements ◽

Order Of Magnitude

AbstractStarting from the fact that the YBa2Cu3O7-x oxide superconductor system has a constant magnetic susceptibility at high temperatures for each oxygen deficiency x, and assuming that the charge carriers have a free-electron-like behavior, the observed magnetic susceptibility of the samples at room temperature can be associated to the Pauli paramagnetismus and to the Landau diamagnetism of the charge carriers. This result allows one to calculate the charge carriers density from the magnetic susceptibility in the sample. If besides one assume that by applying an external pressure on the sample, there is a change of the volume of the unit cell, but not in the number of the charge carriers in it, then, it is possible to calculate the Bulk modulus of the YBaCuO system at room temperature starting from these magnetic measurements. The obtained results are of the same order of magnitude to those reported in the literature and obtained from thermodynamic and mechanical measurements.

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Magnetic cluster developement in In1−x MnxSb semiconductor alloys

Open Physics ◽

10.2478/s11534-009-0140-7 ◽

2010 ◽

Vol 8 (4) ◽

Cited By ~ 7

Author(s):

Lidia Rednic ◽

Iosif Deac ◽

Eugen Dorolti ◽

Marin Coldea ◽

Vasile Rednic ◽

...

Keyword(s):

Magnetic Field ◽

Electron Microscopy ◽

Photoelectron Spectroscopy ◽

Magnetic Measurements ◽

Semiconductor Alloys ◽

X Ray Diffraction ◽

Magnetic Cluster ◽

X Ray ◽

Small Magnetic Field ◽

Transmission Electron

AbstractX-ray Diffraction (XRD), X-ray Photoelectron Spectroscopy (XPS), Transmission Electron Microscopy (TEM) and magnetic measurements as a function of applied magnetic field and temperature for In1−x MnxSb (0.05≤x≤0.2) system are reported. Magnetic measurements performed at high and small magnetic field in ZFC and FC indicate the coexistence of ferromagnetic In1−x MnxSb solid solution and two types of magnetic cluster: ferromagnetic MnSb and ferrimagnetic Mn2Sb. XPS valence band and Mn 2p core level spectra have confirmed the presence of MnSb and Mn2Sb phases. TEM images show some manganese antimonide phase microinclusions with dimension between (30–40) nm.

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