Evidence of electronic phase arrest and glassy ferromagnetic behaviour in (Nd0.4Gd0.3)Sr0.3MnO3manganite: comparative study between bulk and nanometric samples

Kundu, Sumit; Nath, T. K.

doi:10.1088/0953-8984/23/35/356001

Cited by 14 publications

(4 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The corresponding ∆R/R 0 and R 0 /R H values at 123 K are 94% and 16.5, respectively. These respective values are comparable to the best-known CMR effects reported for bulk manganite polycrystalline pellets and exceed the parent RE 1-x A x MnO 3 (A = Sr or Ca) around and >100 K. [2,[41][42][43][44][45][46] Table 1 compares the MR values of different parent variants of bulk polycrystalline RE 1-x Sr x MnO 3 with that obtained for the HE-Mn.…”

Section: Correlated Magneto-electronic Properties and Colossalsupporting

confidence: 78%

High Entropy Approach to Engineer Strongly Correlated Functionalities in Manganites

et al. 2022

View full text Add to dashboard Cite

Technologically relevant strongly correlated phenomena such as colossal magnetoresistance (CMR) and metal‐insulator transitions (MIT) exhibited by perovskite manganites are driven and enhanced by the coexistence of multiple competing magneto‐electronic phases. Such magneto‐electronic inhomogeneity is governed by the intrinsic lattice‐charge‐spin‐orbital correlations, which, in turn, are conventionally tailored in manganites via chemical substitution, charge doping, or strain engineering. Alternately, the recently discovered high entropy oxides (HEOs), owing to the presence of multiple‐principal cations on a given sub‐lattice, exhibit indications of an inherent magneto‐electronic phase separation encapsulated in a single crystallographic phase. Here, the high entropy (HE) concept is combined with standard property control by hole doping in a series of single‐phase orthorhombic HE‐manganites (HE‐Mn), (Gd0.25La0.25Nd0.25Sm0.25)1‐xSrxMnO3 (x = 0–0.5). High‐resolution transmission microscopy reveals hitherto‐unknown lattice imperfections in HEOs: twins, stacking faults, and missing planes. Magnetometry and electrical measurements infer three distinct ground states—insulating antiferromagnetic, unpercolated metallic ferromagnetic, and long‐range metallic ferromagnetic—coexisting or/and competing as a result of hole doping and multi‐cation complexity. Consequently, CMR ≈1550% stemming from an MIT is observed in polycrystalline pellets, matching the best‐known values for bulk conventional manganites. Hence, this initial case study highlights the potential for a synergetic development of strongly correlated oxides offered by the high entropy design approach.

show abstract

Section: Correlated Magneto-electronic Properties and Colossalsupporting

confidence: 78%

High Entropy Approach to Engineer Strongly Correlated Functionalities in Manganites

et al. 2022

View full text Add to dashboard Cite

show abstract

“…At the grain surface, due to the presence of large number of cluster formation, the long range FM order is disturbed and uncompensated spins start to account for large irreversibility. 12 Increase of the net moment of the grains due to the destabilization of the long range FM order at the surface in these systems is strongly dominated by inhomogeneous clusters. Therefore, the decrease in grain size also gives rise to T B below which the thermal energy cannot overcome the magnetic anisotropy.…”

Section: Resultsmentioning

confidence: 93%

Evolution of Griffith's phase in La0.4Bi0.6Mn1−xTixO3 perovskite oxide

Dayal

Kumar

Hadimani

et al. 2014

Journal of Applied Physics

View full text Add to dashboard Cite

amples of La0.4Bi0.6Mn1−xTixO3 have been prepared and their microstructure, composition, and magnetic properties have been investigated for x = 0.05, 0.1, and 0.5.The deviation in the inverse susceptibility behavior from Curie-Weiss law and increase in susceptibility exponent indicates the evolution of the Griffith's phase in La0.4Bi0.6Mn1−xTixO3 around TC. The presence of Griffith's Phase is inferred due to magnetic frustration with increasing Ti concentration. The deviation between field cooled and zero field cooled magnetization curves is observed in these samples and is attributed to the appearance of the spin glass or cluster glass state that arises due to the magnetic anisotropy.

show abstract

“…That is usually accompanied by a FM-PM transition at the Curie temperature T C . It was shown by many authors that physical properties of Nd 1-x Sr x MnO 3 can be considerably affected by the substitution of the Ln-site by various other elements such as Eu [19], La [20], Pr, Dy [21], Gd [22]. Recently, by doping Y ions into Nd 0.7 Sr 0.3 MnO 3 , Khiem et al [23] have found a decrease of T C and a transition from a metallic phase to an insulating phase when the Y content increased.…”

Section: Introductionmentioning

confidence: 99%

Structural, electrical conductance and complex impedance analysis of (Nd1−xCex)0.7Sr0.3MnO3 (0≤x≤0.20) perovskite

Bellouz

Kallel

Khirouni

et al. 2015

Ceramics International

View full text Add to dashboard Cite

International audiencePolycrystalline samples of (Nd1−xCex)0.7Sr0.3MnO3 (x=0, 0.10 and 0.20) were prepared by a high-temperature solid-state reaction technique. The X-ray diffraction study has shown that all the samples exhibit a single phase with orthorhombic structure (space group Pnma). From the resistivity data, it is found that all the samples show metal to semiconductor transition and the transition temperature decreases with the Ce doping. The complex impedance has been investigated in the temperature range 80–320 K and in the frequency range 40 Hz–1 MHz. AC conductance analyses indicate that the conduction mechanism is strongly dependent on temperature and frequency. The impedance plane plot shows semicircle arcs at different temperatures and an electrical equivalent circuit has been proposed to explain the impedance results. The activation energies obtained from the conductance is slightly higher than that from time relaxation analyse

show abstract

Evidence of electronic phase arrest and glassy ferromagnetic behaviour in (Nd_0.4Gd_0.3)Sr_0.3MnO₃manganite: comparative study between bulk and nanometric samples

Abstract: The effect of doping of rare earth Gd 3+

Cited by 14 publications

References 44 publications

High Entropy Approach to Engineer Strongly Correlated Functionalities in Manganites

High Entropy Approach to Engineer Strongly Correlated Functionalities in Manganites

Evolution of Griffith's phase in La0.4Bi0.6Mn1−xTixO3 perovskite oxide

Structural, electrical conductance and complex impedance analysis of (Nd1−xCex)0.7Sr0.3MnO3 (0≤x≤0.20) perovskite

Contact Info

Product

Resources

About