Van Vleck paramagnetism in undoped and Lu-doped bulk ceria

2018 ◽  
Vol 20 (42) ◽  
pp. 27019-27024 ◽  
Author(s):  
Maxim Varenik ◽  
Xiao-Dong Zhang ◽  
Gregory Leitus ◽  
Nimrod Yavo ◽  
Raanan Carmieli ◽  
...  
Keyword(s):  
Magnetic Susceptibility ◽  
Van Vleck Paramagnetism ◽  
Van Vleck ◽  
Vleck Paramagnetism

In Lu-doped CeO2 ceramics, the temperature independent magnetic susceptibility, usually attributed to Van Vleck-type magnetization, decreases linearly with Lu content.

Synthesis, Crystal Structure and Physical Properties of Ba4Ti12O27

2013 ◽  
Vol 566 ◽  
pp. 211-214 ◽  
Author(s):  
Kunimitsu Kataoka ◽  
Hiroshi Hayakawa ◽  
Akira Iyo ◽  
Ken-Ichi Ohshima ◽  
Junji Akimoto
Keyword(s):  
Crystal Structure ◽  
Magnetic Susceptibility ◽  
Solid State ◽  
Barium Titanate ◽  
Physical Properties ◽  
Solid State Reaction ◽  
Polycrystalline Sample ◽  
Van Vleck Paramagnetism ◽  
Van Vleck ◽  
Vleck Paramagnetism

Polycrystalline sample of the reduced barium titanate Ba4Ti12O27 was prepared by solid state reaction in Ar atmosphere. The magnetic susceptibility was nearly temperature independent in the range of 75-300 K, suggesting the Van Vleck Paramagnetism. The temperature dependence of the electric conductivity does not obey any Arrhenius type behavior.

Van Vleck Paramagnetism in Orthorhombic TiO2(Brookite)

1968 ◽  
Vol 175 (3) ◽  
pp. 1144-1146 ◽  
Author(s):  
Frank E. Senftle ◽  
Arthur N. Thorpe
Keyword(s):  
Van Vleck Paramagnetism ◽  
Van Vleck ◽  
Vleck Paramagnetism

Magnetic properties of the germanides RE3Pt4Ge6 (RE=Y, Pr, Nd, Sm, Gd–Dy)

2017 ◽  
Vol 72 (11) ◽  
pp. 855-864 ◽  
Author(s):  
Fabian Eustermann ◽  
Matthias Eilers-Rethwisch ◽  
Konstantin Renner ◽  
Rolf-Dieter Hoffmann ◽  
Rainer Pöttgen ◽  
...  
Keyword(s):  
X Ray Diffraction ◽  
Temperature Dependent ◽  
Modulated Structure ◽  
X Ray ◽  
Antiferromagnetic Ordering ◽  
Arc Melting ◽  
Pauli Paramagnetism ◽  
Van Vleck Paramagnetism ◽  
Van Vleck ◽  
Vleck Paramagnetism

AbstractThe germanides RE3Pt4Ge6 (RE=Y, Pr, Nd, Sm, Gd–Dy) have been synthesized by arc-melting of the elements followed by inductive annealing to improve the crystallinity and allow for structural order. The compounds have been studied by powder X-ray diffraction; additionally the structure of Y3Pt4Ge6 has been refined from single-crystal X-ray diffractometer data. It exhibits a (3+1)D modulated structure, indicating isotypism with Ce3Pt4Ge6. The crystal structure can be described as an intergrowth between YIrGe2- and CaBe2Ge2-type slabs along [100]. Temperature-dependent magnetic susceptibility measurements showed Pauli paramagnetism for Y3Pt4Ge6 and Curie-Weiss paramagnetism for Pr3Pt4Ge6 and Nd3Pt4Ge6. Sm3Pt4Ge6 exhibits van Vleck paramagnetism, while antiferromagnetic ordering at TN=8.1(1) K and TN=11.0(1) K is observed for Gd3Pt4Ge6 and Tb3Pt4Ge6, respectively.

Influence of spin fluctuations on van Vleck paramagnetism in the electron–quasiparticle interaction function of Pr1−xCexNi5 system

2000 ◽  
Vol 284-288 ◽  
pp. 1319-1320
Author(s):  
T Kačmárová ◽  
M Reiffers ◽  
J.Garcia Soldevilla ◽  
J.C.Goméz Sal ◽  
J.I Espeso ◽  
...  
Keyword(s):  
Spin Fluctuations ◽  
Interaction Function ◽  
Van Vleck Paramagnetism ◽  
Van Vleck ◽  
Vleck Paramagnetism

Intermetallics of the types REPd3X2 and REPt3X2 (RE=La–Nd, Sm, Gd, Tb; X=In, Sn) with substructures featuring tin and In atoms in distorted square-planar coordination

2019 ◽  
Vol 74 (11-12) ◽  
pp. 865-878 ◽  
Author(s):  
Simon Engelbert ◽  
Frank Stegemann ◽  
Judith Bönnighausen ◽  
Steffen Klenner ◽  
Oliver Janka ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Temperature Dependent ◽  
Interatomic Distances ◽  
Antiferromagnetic Ordering ◽  
Arc Melting ◽  
Square Planar ◽  
Van Vleck Paramagnetism ◽  
Diffraction Patterns ◽  
Van Vleck ◽  
Vleck Paramagnetism

AbstractThe intermetallic compounds RET3X2 (RE = La–Nd, Sm, Gd, Tb; T = Pd, Pt; X = In, Sn) have been synthesized from the elements by arc-melting and subsequent annealing sequences in tube or induction furnaces. The samples were characterized through Guinier powder diffraction patterns, and several structures were refined from single crystal X-ray diffractometer data. These indium and tin intermetallics crystallize with the orthorhombic CePd3In2-type structure, space group Pnma. The palladium (platinum) and indium (tin) atoms in the RET3X2 structures build up complex three-dimensional [T3X2]δ− polyanionic networks in which the rare earth atoms fill cavities. The striking structural motifs concern the indium, respectively tin substructures, in which part of the indium and tin atoms have distorted square planar homoatomic coordination environments: In1In12In22 units in PrPd3In2 with interatomic distances 325 pm In1–In1 and 332 pm In1–In2 as well as Sn1Sn12Sn22 units in PrPt3Sn2 with the larger distances of 356 pm for Sn1–Sn1 and of 344 pm for Sn1–Sn2. Temperature dependent magnetic susceptibility measurements have indicated Pauli paramagnetism or diamagnetism for the lanthanum compounds, van-Vleck paramagnetism for SmPt3In2 and Curie-Weiss paramagnetism for the remaining compounds. Antiferromagnetic ordering was detected at TN = 4.0(1) K for CePt3In2 and at TN = 3.5(1) K for SmPt3In2. CePt3In2 shows a metamagnetic transition at an external magnetic field of 47(3) kOe.

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