Negative magnetization, complex magnetic ordering and applications of Cr-doped Co2TiO4

2020 ◽  
Vol 22 (13) ◽  
pp. 7058-7064
Author(s):  
Q. S. Fu ◽  
X. H. Chen ◽  
C. Chakrabarti ◽  
C. L. Li ◽  
J. Zheng ◽  
...  
Keyword(s):  
Exchange Interaction ◽  
Magnetic Ordering ◽  
Negative Magnetization

Negative magnetization, exchange interaction and possible applications of Cr-doped Co2TiO4 ceramics have been investigated in detail.

Magnetic Ordering of Perovskite-Like La-, Nd-, and Gd-Doped Bismuth Ferrite

MRS Advances ◽  
2019 ◽  
Vol 4 (36) ◽  
pp. 1989-1999 ◽  
Author(s):  
Valery Sobol ◽  
Barys Korzun ◽  
Olga Mazurenko ◽  
Temirkhan Bizhigitov ◽  
Sabit Tomaev
Keyword(s):  
Magnetic Field ◽  
Exchange Interaction ◽  
Bismuth Ferrite ◽  
Magnetic Ordering ◽  
Solid State Reaction Method ◽  
Nonlinear Dependence ◽  
X Ray Diffraction ◽  
Wide Range ◽  
Pure Grade ◽  
The Magnetic Field

ABSTRACTBismuth ferrite (BiFeO3) and La-, Nd- and Gd-substituted bismuth ferrite of the Bi1-xLaxFeO3, Bi1-xNdxFeO3, and Bi1-xGdxFeO3 types with the atomic part of the substitution element x equal up to 0.20 were synthesized by the solid-state reaction method using powders of oxides Bi2O3, Fe2O3, and La2O3, or Nd2O3, or Gd2O3 of pure grade quality and investigated using X-ray diffraction analysis. The magnetization was measured in the magnetic field up to 6.5⋅106 A/m at 5 and 300 K. It was found that the total substitution up to 0.20 atomic part of Bi by La, Nd, and Gd leads to the paramagnetic behavior of the doped bismuth ferrite at low temperatures in a wide range of magnetic field. Strong nonlinear dependence of magnetization on the magnetic field was detected and a ferromagnetic-like dependence of magnetization was observed for small magnetic fields. This can be explained by the exchange interaction between doping magnetic ions, as well as by the exchange interaction of these ions with ions of iron. The enhancement of magnetic properties with the increase of the content of the substitution is monotone and is more pronounced for the Bi1-xGdxFeO3 ceramics.

Electron Spin Resonance of Gd in Mg Metal

1971 ◽  
Vol 49 (3) ◽  
pp. 352-354 ◽  
Author(s):  
Shaw Ehara
Keyword(s):  
Electron Spin Resonance ◽  
Exchange Interaction ◽  
Electron Spin ◽  
Magnetic Ordering ◽  
Resistance Curve ◽  
A Value ◽  
Spin Resonance ◽  
Resistance Anomaly

ESR of Gd in dilute Mg(Gd) has been studied by Das et al. in order to understand the resistance anomaly observed in this alloy. A value for g = 2.03 ± 0.005 has been obtained for ESR of Gd in Mg(Gd).The positive s–f exchange interaction indicated in our ESR experiment accords with the sign of s–f exchange interaction obtained from the resistance curve according to Kondo's theory. At the lowest temperature the magnetic ordering in this alloy is suggested.

Dilute Potts chain in a magnetic field

1984 ◽  
Vol 62 (1) ◽  
pp. 69-72 ◽  
Author(s):  
C. M. Chaves ◽  
Rosane Riera
Keyword(s):  
Magnetic Field ◽  
Exchange Interaction ◽  
Magnetization Curve ◽  
Uniform Magnetic Field ◽  
Lattice Gas ◽  
Magnetic Ordering ◽  
Exchange Parameter ◽  
One Dimension ◽  
Potts Chain ◽  
The Magnetic Field

The Potts lattice gas in the presence of a uniform magnetic field is solved exactly in one dimension. For negative values of the exchange parameter, the magnetization curve exhibits two or three steps, depending on the concentration of vacancies. These steps arise as a result of the competition between the exchange interaction and the magnetic field, and are associated with different structural distributions of vacancies and the magnetic ordering of one or both sublattices.

Negative magnetization, magnetic anisotropy and magnetic ordering studies on Al3+-substituted copper ferrite

2011 ◽  
Vol 509 (14) ◽  
pp. 4861-4867 ◽  
Author(s):  
V.K. Lakhani ◽  
Bangchuan Zhao ◽  
Lan Wang ◽  
U.N. Trivedi ◽  
K.B. Modi
Keyword(s):  
Magnetic Anisotropy ◽  
Magnetic Ordering ◽  
Copper Ferrite ◽  
Negative Magnetization

Variety of Types of Magnetic Ordering: The Method of Random Exchange Interaction Fields

2020 ◽  
Vol 121 (8) ◽  
pp. 729-732
Author(s):  
V. I. Belokon ◽  
O. I. Dyachenko ◽  
R. V. Lapenkov ◽  
E. V. Chibiriak
Keyword(s):  
Exchange Interaction ◽  
Magnetic Ordering

Noncollinear Phase of Magnetic Multilayers

1997 ◽  
Vol 475 ◽  
Author(s):  
A. I. Morosov ◽  
A. S. Sigov
Keyword(s):  
Exchange Interaction ◽  
Domain Structure ◽  
Layered Structure ◽  
Magnetic Ordering ◽  
Magnetic Multilayers ◽  
Ferromagnetic Phase ◽  
Multilayer Structures ◽  
Antiferromagnetic Phase ◽  
Magnetic Layers

ABSTRACTThere is considered the dependence of magnetic ordering type in multilayer structures on the magnitude of exchange interaction between magnetic layers and the interlayer surfaces roughness. With a simple example of the three-layered structure we found the areas of the existence of such states as: (i) domain structure, (ii) noncollinear ordering of homogeneous magnetic layers, (iii) collinear ferromagnetic phase, and (iiii) collinear antiferromagnetic phase.

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