scholarly journals Non-zero spontaneous magnetic moment along crystalline b-axis for rare earth orthoferrites

2020 ◽  
Vol 127 (11) ◽  
pp. 113906
Author(s):  
Mohanad H. Mohammed ◽  
Z. X. Cheng ◽  
Shixun Cao ◽  
K. C. Rule ◽  
C. Richardson ◽  
...  
Keyword(s):  
Rare Earth ◽  
Magnetic Moment ◽  
Spontaneous Magnetic Moment

Intermediate-valent Ce23Ru7Mg4 and RE23Ru7Mg4 (RE = La, Pr, Nd) with Pr23Ir7Mg4-type Structure

2009 ◽  
Vol 64 (11-12) ◽  
pp. 1345-1352 ◽  
Author(s):  
Stefan Linsinger ◽  
Matthias Eul ◽  
Wilfried Hermes ◽  
Rolf-Dieter Hoffmann ◽  
Rainer Pöttgen
Keyword(s):  
Magnetic Susceptibility ◽  
Rare Earth ◽  
Single Crystal ◽  
Magnetic Moment ◽  
Induction Furnace ◽  
Type Structure ◽  
Space Group ◽  
Structure Space ◽  
Magnesium Compounds ◽  
Intermediate Valent

The rare earth-rich magnesium compounds RE23Ru7Mg4 (RE = La, Ce, Pr, Nd) were synthesized from the elements in sealed tantalum ampoules in an induction furnace. They crystallize with the hexagonal non-centrosymmetric Pr23Ir7Mg4-type structure, space group P63mc. The structures of La23Ru6.88(1)Mg4 (a = 1017.7(4), c = 2286.5(5) pm, wR2 = 0.0277, 2708 F2, 71 variables), Ce23Ru7Mg4 (a = 993.5(3), c = 2243.9(8) pm, wR2 = 0.0573, 2268 F2, 70 variables), and Pr23Ru7Mg4 (a = 996.8(3), c = 2241.5(6) pm, wR2 = 0.0492, 2565 F2, 70 variables) have been refined from single-crystal diffractometer data. The structures are built up from complex threedimensional networks of edge- and corner-sharing RE6Ru trigonal prisms. Cavities within these networks are filled by slightly elongated Mg4 tetrahedra (311 - 315 pm in Pr23Ru7Mg4) and RE6 octahedra. The cerium compound has an a parameter which is even smaller than that of Nd23 Ru7Mg4, indicating intermediate-valent cerium. This was confirmed by magnetic susceptibility measurements. Ce23Ru7Mg4 shows an average, reduced magnetic moment of 2.01 μB/Ce atom. Pr23Ru7Mg4 contains stable trivalent praseodymium (3.64 μB/Pr atom)

scholarly journals Directed synthesis of a hybrid improper magnetoelectric multiferroic material

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Tong Zhu ◽  
Fabio Orlandi ◽  
Pascal Manuel ◽  
Alexandra S. Gibbs ◽  
Weiguo Zhang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Magnetic Moment ◽  
Ferroelectric Material ◽  
Polar Phase ◽  
Antiferromagnetic State ◽  
Exchange Reactions ◽  
Polar Structure ◽  
Directed Synthesis ◽  
Atom Displacement ◽  
Spontaneous Magnetic Moment

AbstractPreparing materials which simultaneously exhibit spontaneous magnetic and electrical polarisations is challenging as the electronic features which are typically used to stabilise each of these two polarisations in materials are contradictory. Here we show that by performing low-temperature cation-exchange reactions on a hybrid improper ferroelectric material, Li2SrTa2O7, which adopts a polar structure due to a cooperative tilting of its constituent TaO6 octahedra rather than an electronically driven atom displacement, a paramagnetic polar phase, MnSrTa2O7, can be prepared. On cooling below 43 K the Mn2+ centres in MnSrTa2O7 adopt a canted antiferromagnetic state, with a small spontaneous magnetic moment. On further cooling to 38 K there is a further transition in which the size of the ferromagnetic moment increases coincident with a decrease in magnitude of the polar distortion, consistent with a coupling between the two polarisations.

Magnetic Properties of Rare Earth Atoms in Palladium - Crystal Field Effects EPR and Magnetic Moment

1973 ◽  
Author(s):  
H. C. Praddaude ◽  
R. P. Guertin ◽  
S. Foner ◽  
E. J. McNiff ◽  
Hugh C. Wolfe ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Rare Earth ◽  
Crystal Field ◽  
Magnetic Moment ◽  
Field Effects

Rare Earth-Transition Metal Indides with Lu5Ni2In4-type Structure

2008 ◽  
Vol 63 (12) ◽  
pp. 1447-1449 ◽  
Author(s):  
Roman Zaremba ◽  
Wilfried Hermes ◽  
Matthias Eul ◽  
Rainer Pöttgen
Keyword(s):  
Rare Earth ◽  
Transition Metal ◽  
Powder Diffraction ◽  
Magnetic Moment ◽  
Magnetic Moments ◽  
Type Structure ◽  
Induction Melting ◽  
X Ray ◽  
Arc Melting ◽  
Experimental Magnetic Moment

New intermetallic compounds RE5T2In4 (RE = Sc, Y, La-Nd, Sm, Gd-Tm, Lu; T = Rh, Ir) were synthesized by arc-melting of the elements or by induction melting of the elements in tantalum crucibles under flowing argon. The samples were characterized by X-ray powder diffraction. They crystallize with the orthorhombic Lu5Ni2In4-type structure, space group Pbam, Z = 2, a 2 : 1 intergrowth variant of CsCl and AlB2 related slabs of compositions InRE8 (distorted cubes) and RhRE6 (distorted trigonal prisms). Susceptibility measurements of Ce5Ir2In4 have revealed modified Curie- Weiss behavior above 70 K with an experimental magnetic moment of 2.45(1) μB / Ce atom. The cerium magnetic moments order ferri- or ferromagnetically at TC = 7.1(2) K.

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.

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