The Nanoflower-Like Morphology and Magnetism of As-Milled Ho(Ni0.8Co0.2)3 Powders Prepared by HEBM

2016 ◽  
Vol 257 ◽  
pp. 76-80 ◽  
Author(s):  
Anna Bajorek ◽  
Clément Berger ◽  
Krystian Prusik ◽  
Marcin Wojtyniak ◽  
Grażyna Chełkowska
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Curie Temperature ◽  
Intermetallic Compounds ◽  
Magnetic Moment ◽  
Saturation Magnetic Moment

The morphology and magnetic properties of the Ho(Ni0.8Co0.2)­3 crystalline and ball – milled intermetallic compounds are presented. The polycrystalline bulk compound crystallizes in the rhombohedral PuNi3 - type of crystal structure and indicates ferrimagnetic arrangement with the Curie temperature of TC = 48 ± 1 K, the helimagnetic temperature Th = 26 ± 2 K with the total saturation magnetic moment of 7.78 µB/f.u. at 2 K. The use of the HEBM method leads to the formation of nanoflakes with typical thickness of less than 100 nm. The extended milling leads to the reduction in particles/crystallites size and in the emergence of the relatively small coercivity (HC).

Crystal structure and magnetic properties of ternary Al3CoNd2 compound

2021 ◽  
pp. 1-6
Author(s):  
Liuqing Liang ◽  
Degui Li ◽  
Chenzhong Jia ◽  
Ming Qin
Keyword(s):  
Crystal Structure ◽  
Curie Temperature ◽  
Magnetic Moment ◽  
Magnetic Hysteresis ◽  
Magnetic Hysteresis Loop ◽  
Lattice Parameter ◽  
Calculated Density ◽  
Cobalt Ions ◽  
Saturation Magnetic Moment ◽  
Refinement Method

A ternary compound Al3CoNd2 was synthesized and its crystal structure parameters were determined by the Rietveld refinement method based on powder X-ray diffraction data. Results show that the compound crystallizes in the MgCu2-type structure (cubic Laves C15 phase, space group $Fd\bar{3}m$ ), with the lattice parameter of a = 7.8424(2) Ǻ, unit-cell volume of V = 482.33 Å3, and calculated density of Dcalc = 5.90 g.cm−3. The residual factors converge to Rp = 0.1024 and Rwp = 0.1287. The reference intensity ratio value obtained experimentally is 3.03. Magnetic susceptibility measurements indicate an agreement with the Curie–Weiss law in the temperature range of 385–450 K, and paramagnetic Curie temperature of θp = 379.9 K. Both rare-earth elements and cobalt ions contribute to the paramagnetic moment. The saturation magnetic moment and magnetic hysteresis loop were measured for the Al3CoNd2 compound at various temperatures. Results show that the saturation magnetic moment value decreases with an increase in temperature and the compound becomes a ferromagnet below the Curie temperature Tc.

scholarly journals Magnetic properties of the non-stoichiometric TbCo2Nix alloys

2018 ◽  
Vol 185 ◽  
pp. 04021
Author(s):  
Alexander Inishev ◽  
Evgeny Gerasimov ◽  
Nikolay Mushnikov ◽  
Pavel Terentev ◽  
Vasily Gaviko
Keyword(s):  
Magnetic Properties ◽  
Curie Temperature ◽  
Concentration Dependence ◽  
Magnetic Moment ◽  
Magnetic Entropy Change ◽  
Entropy Change ◽  
Magnetic Entropy ◽  
Thermodynamic Relation ◽  
Temperature Dependences

The magnetic and magnetothermal properties of the non-stoichiometric TbCo2Nix (0 ≤ x ≤ 0.2) alloys were studied. It was found that the concentration dependence of the Curie temperature and magnetic moment of the 3d-sublattice have a maximum at x = 0.025. The obtained experimental magnetic properties of the TbCo2Nix alloys were discussed under assumption that the Co magnetic moment in the compounds changes with increasing x. The magnetic entropy change was determined using the temperature dependences of the magnetization and Maxwell’s thermodynamic relation. The obtained results for TbCo2Nix were compared with those for the ErCo2Mnx alloys.

Crystal Structure and Magnetic Properties of (2,2'-Dipyridyl)-(2-acetylphenolato)copper(II) Perchlorate

2002 ◽  
Vol 57 (10) ◽  
pp. 1129-1132 ◽  
Author(s):  
A. Elmali ◽  
Y. Elerman ◽  
I. Svoboda
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Magnetic Moment ◽  
Basal Plane ◽  
Effective Magnetic Moment ◽  
Mixed Ligand ◽  
Magnetic Susceptibility Data ◽  
Susceptibility Data ◽  
Dimeric Unit

The mixed-ligand dinuclear complex (2,2'-dipyridyl)-(2-acetylphenolato)copper(II) perchlorate was synthesized and its crystal structures determined. The structure consists of a dimeric unit involving a planar Cu2O2 group. The coordination sphere of the Cu atom can be described as an alongated octahedron where the basal plane is formed by the two N atoms of the 2,2'-dipyridyl molecule and the two O atoms of the acetophenon anion. Two apical Cu - O contacts complete the 4+2 coordination of the Cu atoms. They correspond to one of the O atoms of the perchlorate anion and to the O atom of the second unit. Magnetic susceptibility data obey the Curie-Weiss law with θ = -8.1(2) K. The decreasing of the effective magnetic moment from 1.94(8) μB at 300 K to 1.86(8) μB at 70 K and the negative Weiss constant indicate weak antiferromagnetic interactions between the two copper atoms in the dimeric units.

Structure and Magnetic Properties of GdPt2In and GdPt2Sn

2009 ◽  
Vol 64 (2) ◽  
pp. 170-174 ◽  
Author(s):  
Birgit Heying ◽  
Ute Ch. Rodewald ◽  
Wilfried Hermes ◽  
Rainer Pöttgen
Keyword(s):  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Single Crystal ◽  
Intermetallic Compounds ◽  
Coordination Number ◽  
Magnetic Moment ◽  
Space Group ◽  
X Ray ◽  
Arc Melting ◽  
Experimental Magnetic Moment

The platinum-rich intermetallic compounds GdPt2In and GdPt2Sn were synthesized by arc-melting of the elements and subsequent annealing. The structures were refined from single crystal X-ray diffractometer data: ZrPt2Al type, space group P63/mmc, a = 455.1(1), c = 899.3(3) pm, wR2 = 0.0361, 166 F2 values, 9 variables for GdPt2In, and a = 453.2(1), c = 906.5(2) pm, wR2 = 0.0915, 166 F2 values, 9 variables for GdPt2Sn. The platinum and indium (tin) atoms build up threedimensional [Pt2In] and [Pt2Sn] networks with short Pt-In (Pt-Sn) distances and Pt2 dumb-bells (290 and 297 pm in GdPt2In and GdPt2Sn). The gadolinium atoms have coordination number 14 with 8 Pt and 6 In (Sn) neighbors. Magnetic susceptibility measurements on GdPt2In show Curie-Weiss behavior with an experimental magnetic moment of 8.06(2) μB/Gd atom. GdPt2In orders ferromagnetically at 27.7(2) K

Structure and Magnetic Properties of a Dinuclear Complex with Iron(III) in Octahedral and Pyramidal Coordination

1994 ◽  
Vol 49 (9) ◽  
pp. 1239-1242 ◽  
Author(s):  
Ayhan Elmali ◽  
Yalcin Elerman ◽  
Ingrid Svoboda ◽  
Hartmut Fuess ◽  
Klaus Griesar ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Magnetic Moment ◽  
Effective Magnetic Moment ◽  
Dinuclear Complex ◽  
Monoclinic Space Group ◽  
Temperature Dependent ◽  
Space Group ◽  
Binuclear Unit

[FeL(MeOH)Cl]2 (L = N-(2-hydroxyphenyl)salicylaldimine) was synthesized and its crystal structure determined, [C27H20N 2O5Cl2Fe2], monoclinic, space group P21/c, a = 9.528(1), b = 7.684(1), c = 18.365(2) Å, β = 109.83(1)°, V = 1264.8 Å3, Z = 2. Two identical [FeL(MeOH)Cl] fragments, related by an inversion centre, are combined by the two bridging O atoms, to form a binuclear unit. The iron(III) centers are separated by 3.163(2) Å and weakly antiferromagnetically coupled (J = -8 .0 (1 ) cm-1), which follows from temperature - dependent magnetic susceptibility measurements in the range 4.2 to 288 K. The effective magnetic moment per iron(III) is μeff = 7.4 μB at 288 K

Crystal Structure and Magnetic Properties of the Novel Hollandite Ba1.3Co1.3Ti6.7O16

2011 ◽  
Vol 66 (11) ◽  
pp. 1097-1100 ◽  
Author(s):  
Larysa Shlyk ◽  
Rainer Niewa
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Single Crystals ◽  
Magnetic Moment ◽  
High Spin State ◽  
The Novel ◽  
Charge Balance ◽  
Vertex Sharing ◽  
State Spin

Single crystals of the new barium hollandite Ba1.3Co1.3Ti6.7O16 were obtained from a BaCl2 flux (I2/m, Z = 1, a = 9.9470(4), b = 2.9714(2), c = 10.2260(5) Å , β = 90.906(2)◦). In the crystal structure piles of Ba atoms are situated within a framework of edge- and vertex-sharing octahedra (Co,Ti)O6. The composition was deduced from microprobe analyses, structure refinements and charge balance arguments in agreement with the observed magnetic properties. The temperature dependence of the magnetic susceptibility χ(T) of Ba1.3Co1.3Ti6.7O16 single crystals reveals paramagnetism down to 2 K. The value of the Co magnetic moment deduced from the Curie-Weiss law agrees well with the theoretical value of the high-spin state spin-only moment of μeff = 3.87 μB for Co2+ (S = 3/2)

Transition from Itinerant Electron Magnetism to Localized Spin Magnetism in Ni3Al1-YMny Alloys

2010 ◽  
Vol 168-169 ◽  
pp. 149-152 ◽  
Author(s):  
A.V. Korolyov ◽  
N.I. Kourov ◽  
S.Z. Nazarova ◽  
Y.A. Dorofeev ◽  
N.V. Volkova ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Curie Temperature ◽  
Magnetic Moment ◽  
Effective Magnetic Moment ◽  
Average Distance ◽  
Magnetic Moments ◽  
Itinerant Electron ◽  
Spin Magnetism ◽  
Spontaneous Magnetic Moment

Magnetic properties of Ni3Al1-yMny alloys at y≤0.6 were investigated at T≤400 K in magnetic fields H≤4 MA/m. The concentration y dependencies of the spontaneous magnetic moment s, the effective magnetic moment eff, the Curie temperature ТС, the Weiss constant , and the temperature independent part of the magnetic susceptibility 0 were determined. The behavior of the Rhodes-Wohlfarth parameter р(y) in the transition region from the itinerant electron magnetism to the spin localized one is related to the increase in the spontaneous magnetic moment of Ni atoms inversely proportional to the average distance between Mn atoms with the highly localized magnetic moments.

Crystal structure and magnetic properties of novel intermetallic compounds in the Er–Cu–Ga system

2009 ◽  
Vol 478 (1-2) ◽  
pp. 89-95 ◽  
Author(s):  
B. Belgacem ◽  
M. Pasturel ◽  
O. Tougait ◽  
M. Potel ◽  
T. Roisnel ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Intermetallic Compounds

Synthesis, Structure Determination, and Magnetic Properties of [Cr3(dpa)4Cl2][CuCl2], a Compound Comprising a Trinuclear Chain Cation

2012 ◽  
Vol 67 (8) ◽  
pp. 759-764 ◽  
Author(s):  
Dilahan Aydin-Cantürk ◽  
Hanne Nuss Max-Planck
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Partial Oxidation ◽  
Ethyl Ether ◽  
Structure Determination ◽  
Magnetic Moment ◽  
Effective Magnetic Moment ◽  
X Ray ◽  
Weiss Constant ◽  
Paramagnetic Behavior

The new compound [Cr3(dpa)4Cl2][CuCl2] (1) (dpa = di-2,2'-pyridylamido) was synthesized by reacting Cr2(dpa)4 and anhydrous CuCl2 in dry tetrahydrofuran. Partial oxidation of Cr2(dpa)4 by Cu(II) forms Cr3+ ions, which coordinate to the free N donor atoms of the dpa ligands, and led to the formation of a trinuclear chain cation [Cr3(dpa)4Cl2]+. Recrystallization from CH2Cl2/ethyl ether yielded dark-brown, block-shaped crystals suitable for X-ray structure determination (Pccn (no. 56), a=1246:8(5), b=1487:3(3), c=2184:8(1) pm, V =4051.6(8) ·106 pm3, Z =4). The crystal structure is composed of discrete [Cr3(dpa)4Cl2]+ cations and [CuCl2]- anions. The Cr3 chain comprises quadruply-bonded diamagnetic (Cr2)4+ dimers and a pseudo-octahedrally coordinated, paramagnetic Cr3+ ion, manifesting itself in the effective magnetic moment μeff of 3:54μB (d3, S = 3=2) and the almost ideal Curie-paramagnetic behavior observed between 2 and 300 K with a Weiss constant θ = -0:25(4)K and χ0 = 4:9(7)×10-4 emu mol-1

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