Local spin configurations of Fe atoms in the Rh1−x Fex (x=0.1, 0.2, and 0.3) system with competing exchange interactions

Parfenova, V. P.; Delyagin, N.N.; Erzinkyan, A. L.; Reiman, S.

doi:10.1134/1.1307054

Cited by 9 publications

(13 citation statements)

References 10 publications

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“…Therefore a step for change of hyperfine field between the adjacent trial sextets (Δ) appears to be relatively large which might result in a [142] alloys taken at T = 5 K, a hyperfine field distribution (HFD) at 57 Fe nuclei was shown to be discontinuous and expressed in occurrence of a wavy profile at the HFD. Authors of works [140][141][142] applied the own fitting program and explained their results by variations of contributions from the magnetic moments of iron atoms next to the resonating atom, assuming a competition of ferro-and antiferromagnetic interactions of neighbors and their random distribution in the nearest coordination sphere of iron. The calculation scheme close to that has been suggested in a work [103].…”

Section: A Fine Structure In the Hyperfine Field Distribution (Hfd) Amentioning

confidence: 99%

Structure and Magnetic Properties of Aerosol Nanoparticles of Fe and Its Alloys

Petrov

Shafranovsky

2012

International Journal of Inorganic Chemistry

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Structure and magnetic properties of aerosol nanoparticles of Fe and its alloys (FeMn, FeNi, FeNiMn, FePt, FeCr, FeCo, and FeCu) have been reviewed. It has been shown that, compared to a bulk material, the particles have a number of specific features being of much fundamental and applied interest. The effect of both a quenched high-temperature Fe modification and its oxides on the structure and magnetism of nanoparticles has been considered in detail. Particular attention has been paid to the recently observed fine structure in the hyperfine field distribution at iron nuclei in Mössbauer spectra for pure iron and its alloys both as a bulk and aerosol nanoparticles. This phenomenon makes it possible to reveal very weak magnetic interactions in the system under study. The plausible origin of these magnetic interactions has been also discussed.

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Section: A Fine Structure In the Hyperfine Field Distribution (Hfd) Amentioning

confidence: 99%

Structure and Magnetic Properties of Aerosol Nanoparticles of Fe and Its Alloys

Petrov

Shafranovsky

2012

International Journal of Inorganic Chemistry

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“…In previous papers [1,2] we have reported on the results of Mö ssbauer investigations of magnetically ordered fcc Rh 1--x Fe x alloys with 0.1 x 0.3. These alloys were discovered to have an unusual magnetic spin structure consisting of randomly distributed ferro-and antiferromagnetic local spin configurations.…”

Section: Introductionmentioning

confidence: 99%

“…These alloys were discovered to have an unusual magnetic spin structure consisting of randomly distributed ferro-and antiferromagnetic local spin configurations. It was suggested [1,2] that this spin structure arises from the competition between two opposite in sign exchange interactions: antiferromagnetic coupling between nearest-neighbor (n.n.) Fe atoms and ferromagnetic exchange interaction with the rhodium matrix.…”

Section: Introductionmentioning

confidence: 99%

“…Within this context, in this paper, we present the results of Mö ssbauer study of the magnetic hyperfine interaction for 57 Fe in the magnetically ordered fcc (Rh 1--x Pd x ) 0.9 Fe 0.1 alloys with 0 x 1. The iron concentration in these alloys corresponds to the minimal one used in previous investigations of Rh-Fe system [1,2]. Mö ssbauer spectroscopy is a powerful method for studying magnetic systems with complicated magnetic structure.…”

Section: Introductionmentioning

confidence: 99%

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Local Spin Configurations and Magnetic Ordering in Competing-Exchange System (Rh, Pd)90Fe10

Parfenova

Erzinkyan

Delyagin

et al. 2001

phys. stat. sol. (b)

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Mö ssbauer spectroscopy technique has been used to investigate the evolution of the hyperfine field distributions and the local spin configurations of Fe atoms in the magnetically ordered (Rh 1--x Pd x ) 0.9 Fe 0.1 alloys over the concentration range 0x 1. In the whole composition range, the magnetic behavior of the alloys is governed by the competition between two exchange interactions opposite in sign: the direct antiferromagnetic coupling between the nearest-neighbor Fe atoms and the ferromagnetic interaction due to the matrix polarization. For Rh-rich alloys, this leads to a spin-glass-like magnetic structure, where the ferro-and antiferromagnetic local spin configurations are realized with nearly equal probabilities. For the concentration range x 0.3, the magnetic ordering temperature is equal to about 32 K independent of the Pd concentration. In the same concentration range, a sharp increase of the magnetic moment of Fe atoms was observed. The severe influence of rhodium on the Curie temperature of the ferromagnetic PdFe alloy is explained by the spin reorientation effect, leading to a destruction of the ferromagnetic spin structure. The strong diffuseness of the magnetic transition in the intermediate concentration range 0.4 < x < 0.8 is due to the presence of Fe sites with both Rh-rich and Pd-rich local environments.

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“…The antiferromagnetic nature of magnetic ordering for a given Fe concentration in these alloys was known long ago from macroscopic measurements 17 and a specific type of antiferromagnetic ordering was established in a study by Parfenova et al 18 using the Mössbauer effect. A piece of the ingot of rectangular form (5*5*4 mm 3 ) with the scattering plane at 45 degrees to the chip surface was fixed in a holder (see Figure 2) 1 mm from the smaller and 2 mm from the bigger detector.…”

Section: -4mentioning

confidence: 99%

Observation of nuclear gamma resonance with superconducting tunnel junction detectors

et al. 2016

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Nb-based superconducting tunnel junction detectors have been used for the registration of electrons following a nuclear gamma resonance (Mössbauer effect). Electrons were produced by a RhFe scatterer under irradiation by the 57Co(Rh) Mössbauer source. This observation demonstrates the role which can be played by superconducting tunnel junction detectors in the field of conversion electron Mössbauer spectroscopy and other types of electron spectroscopy.

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Local spin configurations of Fe atoms in the Rh1−x Fex (x=0.1, 0.2, and 0.3) system with competing exchange interactions

Cited by 9 publications

References 10 publications

Structure and Magnetic Properties of Aerosol Nanoparticles of Fe and Its Alloys

Structure and Magnetic Properties of Aerosol Nanoparticles of Fe and Its Alloys

Local Spin Configurations and Magnetic Ordering in Competing-Exchange System (Rh, Pd)90Fe10

Observation of nuclear gamma resonance with superconducting tunnel junction detectors

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