Mössbauer study of relaxation phenomena in zinc-ferrous ferrites

Srivastava, C. M.; Shringi, S.N.; Srivastava, Rohit

doi:10.1103/physrevb.14.2041

Cited by 87 publications

(11 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In GexCu1-xFe204, the hyperfine field at the B-site is nearly independent of x, while that at the A-site decreases as Ge substitution increases, but no correlation was observed between the isomer shifts and magnetic hyperfine fields [16]. Similar results have also been reported on Zn-substituted spinels [17] and have been explained on the basis of A-B supertransferred interactions, where the canting of the spins gives rise to Yafet-Kittel angles that render the A-B and B-B interactions comparable in strength. There are many similarities in the dependence of the hyperfine interaction parameters of the investigated system and those discussed above, which suggest an analogous interpretation of the results.…”

Section: Resultssupporting

confidence: 82%

The effect of Ge4+ substitution in lithium ferrites

Mazen

Yousif

Elzain

1995

Phys. Stat. Sol. (a)

View full text Add to dashboard Cite

X‐ray diffraction, infrared, and Mössbauer spectroscopy techniques are used to investigate Li0.5 + 0.5x GexFe2.5 ‐ 1.5xO4; x ≦ 0.5. The polycrystalline samples show single‐phase spinel structure. The lattice constant for x ≧ 0.2 is found to be nearly constant, but smaller than for x = 0. A small component of Fe2+ has been detected in the IR spectra. The Mössbauer absorption patterns give magnetic sextets superimposed on a paramagnetic component that increases with increasing germanium content. The average hyperfine field at the A‐site is found to decrease faster than at the B‐site. A consistent interpretation of the information obtained from the different methods is provided. It is also suggested to give a qualitative explanation for the differential variation of the average hyperfine fields at the two sites on the basis of supertransferred hyperfine interactions.

show abstract

Section: Resultssupporting

confidence: 82%

The effect of Ge4+ substitution in lithium ferrites

Mazen

Yousif

Elzain

1995

Phys. Stat. Sol. (a)

View full text Add to dashboard Cite

show abstract

“…The average size is about 10 mm. So the MS doublet does not come from superparamagnetism, but results from the nonferromagnetic Fe atom which is caused by more nonmagnetic ion neighbours or perhaps thermally excited domain wall oscillations just like Zn-substituted ferrites [14]. Comparing the Mo È ssbauer spectra of Fe 3 SnN with that of Fe 4 N, we can find that the Fe 3 SnN has weaker magnetism because of the substitution of diamagnetic Sn atoms.…”

Section: Resultsmentioning

confidence: 95%

Preparation and Characterization of γ′-Fe3SnN

Zhao

Xue

Chen

et al. 1999

phys. stat. sol. (a)

View full text Add to dashboard Cite

“…This can be explained on the basis of model of domain-wall oscillations and displacements. 9 Mössbauer spectrum initially consists of two sextets which are produced by ions distributed over A and B sites which lie within the range of domain walls. These domain walls would be bound to their equilibrium position and their motion becomes damped.…”

Section: Resultsmentioning

confidence: 99%

MÖSSBAUER STUDY OF In³⁺ AND Al³⁺ ADDITIVES IN Mg–Mn FERRITES

Singh

Chauhan

2000

Int. J. Mod. Phys. B

View full text Add to dashboard Cite

The effect of In 3+ and Al 3+ substitution in Mg-Mn ferrite has been studied from Mössbauer analyzes of Mg 0.9 Mn 0.1 MxFe 2−x O 4 (0 ≤ x ≤ 0.9) and Mg 0.9 Mn 0.1 Fe 2−y O 4 (0 ≤ y ≤ 0.5) ferrites. The internal magnetic field has been found to decrease at tetrahedral and octahedral sites when the concentration of In 3+ and Al 3+ ions is successively increased. A ferromagnetic relaxation followed by paramagnetic transition is observed for higher concentrations of In 3+ ions, it has been inferred that a larger concentration of In 3+ ions enhances relaxation effects. The observed values of isomer shift corresponding to Fe 3+ ions at A as well as B sites in both the series show an insignificant variation with increase in the concentration of In 3+ and Al 3+ ions. It is also inferred that all the samples show negligible value of quadrupole splitting with in experimental errors. The occupancy ratio increases with increase of In 3+ ions and the occupancy ratio decreases with increase of concentration of Al 3+ ions. The results of occupancy of Fe 3+ ions at B to A site, as obtained from Mössbauer studies are in conformity with the cation distribution used to explain variation of 4πMs and µ 0 .

show abstract

Mössbauer study of relaxation phenomena in zinc-ferrous ferrites

Cited by 87 publications

References 25 publications

The effect of Ge4+ substitution in lithium ferrites

The effect of Ge4+ substitution in lithium ferrites

Preparation and Characterization of γ′-Fe3SnN

MÖSSBAUER STUDY OF In³⁺ AND Al³⁺ ADDITIVES IN Mg–Mn FERRITES

Contact Info

Product

Resources

About

Mössbauer study of relaxation phenomena in zinc-ferrous ferrites

Cited by 87 publications

References 25 publications

The effect of Ge4+ substitution in lithium ferrites

The effect of Ge4+ substitution in lithium ferrites

Preparation and Characterization of γ′-Fe3SnN

MÖSSBAUER STUDY OF In3+ AND Al3+ ADDITIVES IN Mg–Mn FERRITES

Contact Info

Product

Resources

About

MÖSSBAUER STUDY OF In³⁺ AND Al³⁺ ADDITIVES IN Mg–Mn FERRITES