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1Magnetic Ordering in Nickel Ferrite-Chromite NiFeCrO 4 below the Compensation Temperature

L. G. Antoshina,E. N. Evstaf’eva,A. I. Kokorev

The behavior of the magnetoresistance of nickel ferrite-chromite NiFeCrO 4 is studied at temperatures in the vicinity of the compensation temperature. A model of magnetic ordering in this compound is proposed. It is established that, at T = 0 K, the sublattice B is responsible for magnetic ordering.

2007Physics of the Solid State（2007）引用：4

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2Влияние Магнитного Упорядочения На Структурные Свойства Разбавленных Ферритов Меди

Л.Г. Антошина,Е.Н. Евстафьева,А.И. Кокорев,А.А. Опаленко,А.И. Фиров

2007Физика твердого тела引用：23

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3Influence of Magnetic Ordering on the Structural Properties of Dilute Copper Ferrites

L. G. Antoshina,E. N. Evstaf’eva,A. I. Kokorev,A. A. Opalenko,A. I. Firov

The x-ray structural properties of samples in the CuGa x Al x Fe 2−2 x O 4 ( x = 0−0.7) and CuGa x Al 2 x Fe 2−3 x O 4 ( x = 0−0.5) systems are studied. It is found that magnetic ordering in dilute copper ferrites affects their structural properties. It is concluded that the frustration of magnetic coupling leads to suppression of the cooperative Jahn-Teller effect in dilute copper ferrites with a frustrated magnetic structure.

2007Physics of the solid state（2007）引用：1

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4Magnetic Properties of Diluted Nickel Ferrite NiGa 0.7 Al 0.7 Fe 0.6 O 4 with Frustrated Magnetic Structure

L. G. Antoshina, A. S. KOZ'MIN,A. I. Kokorev,A. A. Opalenko,A. I. Firov

The investigation of magnetic properties of diluted ferrite NiGa0.7Al0.7Fe0.6O4 is carried out. The anomalous behaviour of spontaneous magnetization σs(T), coercive force Hc(T) and derivative of spontaneous magnetization (dσs/dT)(T) is revealed for the sample with frustrated magnetic structure. It is found that the Mossbauer spectrum is doublet at the temperature T = 295 K of the investigated ferrite. This is proved that the magnetic structure represents clusters formed by short-range magnetic order at the temperature below the Curie temperature TC. © MISM2005. All rights reserved

2005引用：23

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5Susceptibility of the Paraprocess in Spinel Ferrites with a Frustrated Magnetic Structure

L. G. Antoshina,E. N. Evstaf’eva,A. I. Kokorev, A. S. Koz’min

The temperature dependence of the susceptibility of the paraprocess χpara (T) is investigated for samples in the CuGaxAlxFe2−2xO4 (x = 0.2, 0.3, 0.4, 0.5, 0.6, 0.7), CuGaxAl2xFe2−3xO4 (x = 0.1, 0.2, 0.3, 0.4, 0.5), and GaxFe1− xNiCrO4 (x = 0.0, 0.2, 0.4, 0.6, 0.8) systems. It is found that long-range magnetic order arises in spinel ferrites at the temperature Ttran of the transition from a cluster spin-glass state to a frustrated magnetic structure with a maximum in the temperature dependence of the susceptibility of the paraprocess.

2003Journal of Magnetism and Magnetic Materials（2003）引用：5

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6Magnetic Structure of the NiCr2O4 Nickel Chromite

A. N. Goryaga,L. G. Antoshina,A. I. Kokorev,D. A. Chursin

The magnetic properties of the NiCr 2 O 4 chromite are investigated and compared with similar properties of the NiFe 1.1 Cr 0.9 O 4 nickel ferrite-chromite material. It is found for the first time that the tetrahedral ( A ) sublattice of the NiCr 2 O 4 chromite is responsible for the total magnetic moment. Moreover, it is revealed that the NiCr 2 O 4 chromite exhibits a giant magnetostriction of the paraprocess (λ para ∼ 200×10 −6 ) and an anomalously large volume magnetostriction (ω ∼ 500×10 −6 ) at a temperature of 4.2 K in magnetic fields up to ∼50 kOe. The inference is made that the observed paraprocess is caused by an increase in the degree of noncollinearity of the magnetic moments induced in the octahedral ( B ) sublattice of the NiCr 2 O 4 chromite in an external magnetic field.

2002Physics of the Solid State（2002）引用：7

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