Radiation effects in oxide ferrimagnets

Chukalkin, Yu. G.; Goshchitskii, B. N.; Дубинин, С. Ф.; Сидоров, С. К.; Petrov, V. V.; Пархоменко, В. Д.; Vologin, V. G.

doi:10.1002/pssa.2210280140

Cited by 22 publications

(1 citation statement)

References 5 publications

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“…Neutron damage studies of magnetic sensor materials are few and far between (see Appendix for an incomplete summary), and results indicate a wide range of behaviors, including amorphization (Chukalkin et al 1983), cation site mixing (Chukalkin et al 1975), superparamagnetism (Parkhomenko et al 1976), anisotropy change (Chukalkin et al 1981), loss of remnance (Anderson et al 2005), or complete loss of magnetization due to radiation-induced thermal spikes (Liu et al 2007). In addition to their use in magnetostrictive transducers, magnetic materials are integral to the operation of linear variable differential transformers (LVDTs), which will also find future use as in-pile diagnostic instruments ).…”

Section: Magnetic Sensor Materials and In-situ Measurementsmentioning

confidence: 99%

Materials Degradation and Detection (MD2): Deep Dive Final Report

McCloy¹,

Montgomery²,

Ramuhalli³

et al. 2013

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Section: Magnetic Sensor Materials and In-situ Measurementsmentioning

confidence: 99%

Materials Degradation and Detection (MD2): Deep Dive Final Report

McCloy¹,

Montgomery²,

Ramuhalli³

et al. 2013

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Exchange Fe3+-Fe3+ interactions in ferrites with spinel structure

Vologin

Parkhomenko

Дубинин

et al. 1976

Phys. Stat. Sol. (a)

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3+ 3+-FeIt is known that intersublattice (A -B) exchange Fe interaction in many types of ferrites with spinel structure causes in the main the ferrimagnetic order.However, the presence, as a rule, of two (or more) types of magnetic ions in ferrites makes this important interaction difficult to study.The zinc and magnesium monoferrites belong to the not numerous class of compounds with one type of magnetic cations. But their magnetic properties in the equilibrium state essentially differ on account of the different cation distribution.Zinc ferrite has the structure of a normal spinel and therefore there exist in it weak negative iron-iron interactions in the B-sublattice that cause antiferromagnetic ordering of magnetic moments at low temperatures (1). OF the contrary, magnesium ferrite turns out to be a typical ferrimagnet due to a structure similar to the inversed ond (2).It is natural that ferrites of similar structure and with sufficient number of magnetoactive cations in A-and B-sublattices should be the most convenient ones for studying the intersublattice exchange Fe -Fe interactions. 3+ 3+As it was shown in (3) such isostructural (with equally probable distribution of cations over A-and B-sites) state in such class of ferrites might be achieved by the influence of fast neutrons upon them.The study of the suggested cation distribution and of the character of exchange interactions in irradiated zinc and magnesium ferrites has been carried out by the method of powder neutronography. The separation of nuclear and magnetic scatterings in the neutron diffraction pattern has been achieved with a magnetic field being applied along the scattering vector during the measuring process. The details of the experimental methods a r e given in (3).

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Peculiarities of radiation damage in ferrites with spinel structure

Пархоменко

Дубинин

Goshchitskii

et al. 1976

Phys. Stat. Sol. (a)

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I n ZnFe,O, irradiated by fast neutrons a superparamagnetic state (an ensemble of ferrimagnetic regions with equally probable distribution of cations over Aand B-sites in paramagnetic matrix) is achieved. The properties of superparamagnetic state allow to make conclusions about the character of replacement cascades in ferrites with spinel structure.Some parameters of the replacement cascade are given. It is shown experimentally how the irradiation temperature influence the size of the disordered regions.In ZnFqO,, das mit schnellen Nentronen bestrahlt wurde, wird ein superparamagnetischer Zustand erhalten (ein Ensemble von ferrimagnetischen Bereichen mit einer Wahrscheinlichkeitsgleichverteilung der Kationen iiber die Aund B-Pliitze in einer paramagnetischen Matrix). Die Eigemchaften des superparamagnetischen Zustands erlauben Schliisse iiber den Charakter der Verlagerungskaskaden in Ferriten mit Spinellstruktur. Einige Parameter der Verlagerungskaskade werden angegeben. Es wird experimentell gezeigt, wie die Bestrahlungstemperatur die GroDe der fehlgeordneten Bereiche beeinflul3t.

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Radiation effects in oxide ferrimagnets

Cited by 22 publications

References 5 publications

Materials Degradation and Detection (MD2): Deep Dive Final Report

Materials Degradation and Detection (MD2): Deep Dive Final Report

Exchange Fe3+-Fe3+ interactions in ferrites with spinel structure

Peculiarities of radiation damage in ferrites with spinel structure

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