Antisite disorder driven cluster glass state and colossal magnetoresistance in 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>MnSb</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>Se</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:mrow></mml:math>

Kumar, Rahul; Sundaresan, A.

doi:10.1103/physrevb.106.134423

Cited by 8 publications

(9 citation statements)

References 53 publications

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“…where ∆T f = T f2 − T f1 and ∆log 10 f = log 10 f 2 − log 10 f 1 . For a canonical spin-glass system, the Mydosh parameter has a value of 0.005 to 0.01, while for cluster glass, the value ranges from 0.03 to 0.06 [39,54,55]. Here, we obtain S ∼0.025, which deviates from the value of canonical spin-glass and is closer to that of cluster glass.…”

Section: Ac Susceptibilitymentioning

confidence: 46%

“…T curve shows a minimum at ∼53 K. This corresponds to the Neel temperature, T N , of the secondary-phase EMO, which shows an incommensurate AFM ordering below ∼53 K [37,38]. The observed deviation of the fitted curve from the original χ −1 vs. T curve below 180 K could be due to short-range magnetic fluctuations [39]. The non-vanishing REM and the bifurcation between ZFC and FC MT curves above T N is a consequence of the presence of the FM spin clusters above T N [40,41].…”

Section: Magnetizationmentioning

confidence: 89%

“…As already mentioned, in the Eu 1−x Sr x MnO 3 (in the vicinity of x ∼0.5) system, competition between the FM DE and AFM SE interactions is common [26]. When a magnetic field is applied, it favors DE interactions and suppresses SE interactions, leading to a higher T C [26,39].…”

Section: Magnetizationmentioning

confidence: 93%

“…However, the 50 K peak moves under the frequency increment, which can be seen from χ ′ ′ too. This can be attributed to a delay in spin relaxation due to a prolonged action time, a characteristic of glassy phase transitions [39]. An empirical parameter known as the Mydosh parameter (S) can be used to determine the sensitivity of such a peak shift to the applied frequency.…”

Section: Ac Susceptibilitymentioning

confidence: 99%

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Table-like magnetocaloric effect due to field-induced inter-cluster interactions in Eu_0.5Sr_0.5MnO₃–EuMnO₃ composites

Akram,

de h-Óra,

Bansal

et al. 2023

J. Phys. D: Appl. Phys.

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The table-like behavior of the magnetic entropy change is generally observed in rare-earth-based alloys (e.g. La(Fe,Si)13, Gd50Co45Fe5, Gd56Ni15Al27Zr2, Gd ( 1 − x − y ) Co x Al y etc). Here, we report similar table-like behavior in a bulk perovskite Eu0.5Sr0.5MnO3–EuMnO3 composite system with a working temperature span of ∼80 K for a field change of ∼70 kOe. AC susceptibility and time-dependent DC magnetization relaxation measurements confirm the presence of interacting ferromagnetic clusters with a Vogel–Fulcher freezing temperature of T 0 ∼ 42.7 K. The Langevin function fittings of the isothermal magnetization curves show a non-monotonous variation of cluster size with temperature. We propose a model for the high-field dependency of the ferromagnetic cluster coupling in the composite system. This widens the transition temperature region of long-range order formation and hence gives rise to the table-like magnetocaloric effect in Eu0.5Sr0.5MnO3–EuMnO3 composite systems.

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Section: Ac Susceptibilitymentioning

confidence: 46%

Section: Magnetizationmentioning

confidence: 89%

Section: Magnetizationmentioning

confidence: 93%

Section: Ac Susceptibilitymentioning

confidence: 99%

See 2 more Smart Citations

Table-like magnetocaloric effect due to field-induced inter-cluster interactions in Eu_0.5Sr_0.5MnO₃–EuMnO₃ composites

Akram,

de h-Óra,

Bansal

et al. 2023

J. Phys. D: Appl. Phys.

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“…The coexistence of such unconventional electronic phases in a single compound is not common and hence gives us a new avenue to explore the evolution of such phases via T-mediated structural changes. References [86][87][88][89][90][91][92][93][94][95][96][97] have been cited in the SM.…”

Section: Discussionmentioning

confidence: 99%

Unconventional electronic phase transition in SnBi₂Te₄: role of anomalous thermal expansion

Dalui,

Das,

Barman

et al. 2023

J. Phys.: Condens. Matter

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We propose SnBi2Te4 to be a novel topological quantum material exhibiting temperature (T) mediated transitions between rich electronic phases. Our combined theoretical and experimental results suggest that SnBi2Te4 goes from a low-T semimetallic phase to a high-T (room temperature) insulating phase via an intermediate metallic phase. Single crystals of SnBi2Te4 are characterized by various experimental probes including synchrotron based X-ray diffraction, magnetoresistance, Hall effect, Seebeck coefficient and magnetization. X-ray diffraction data confirms an anomalous thermal expansion of the unit cell volume below ∼ 100 K, which significantly affects the bulk band structure and hence the transport properties. Simulated surface states are found to be topologically robust with varying T. This indirectly supports the experimentally observed paramagnetic singularity in the entire T -range. The proposed coexistence of such rich phases is a rare occurrence, yet it facilitates a fertile ground to tune them in a material driven by structural changes.

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Synthesis, Optical, Dielectric, SHG, Magnetic and Visible Light Driven Catalytic Studies on Compounds Belonging to the Swedenborgite Structure

Gurusamy,

Banerjee,

Sundaresan

et al. 2024

Chemistry An Asian Journal

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A new compound, InBaZn3GaO7, with swedenborgite structure along with transition metal (TM) substituted variants has been prepared. The structure contains layers of tetrahedral ions (Zn2+/Ga3+) connected by octahedrally coordinated In3+ ion forming the three‐dimensional structure with voids where the Ba2+ ions occupy. The TM substituted compounds form with new colors. The origin of the color was understood based on the ligand‐field transitions and metal to metal charge transfer (MMCT) transitions . The near IR reflectivity studies indicate that the Ni – substituted compounds exhibit good near – IR reflectivity behavior, making them possible candidates for ‘cool‐pigments’. The temperature dependent dielectric studies indicate that the InBaZn3GaO7 compound undergoes a phase transition at ~ 360 °C. The compounds are active towards second harmonic generation (SHG). Magnetic studies show the compounds, InBaZn2CoFeO7 and InBaZn2CuFeO7 to be anti‐ferromagnetic in nature. The copper containing compounds were found to be good catalysts, under visible light, for the oxidation of aromatic alkenes. The many properties observed in the swedenborgite structure‐based compounds suggests that the mineral structure offers a fertile ground to investigate newer compositions and properties.

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Antisite disorder driven cluster glass state and colossal magnetoresistance in MnSb2Se4

Cited by 8 publications

References 53 publications

Table-like magnetocaloric effect due to field-induced inter-cluster interactions in Eu_0.5Sr_0.5MnO₃–EuMnO₃ composites

Table-like magnetocaloric effect due to field-induced inter-cluster interactions in Eu_0.5Sr_0.5MnO₃–EuMnO₃ composites

Unconventional electronic phase transition in SnBi₂Te₄: role of anomalous thermal expansion

Synthesis, Optical, Dielectric, SHG, Magnetic and Visible Light Driven Catalytic Studies on Compounds Belonging to the Swedenborgite Structure

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Antisite disorder driven cluster glass state and colossal magnetoresistance in MnSb2Se4

Cited by 8 publications

References 53 publications

Table-like magnetocaloric effect due to field-induced inter-cluster interactions in Eu0.5Sr0.5MnO3–EuMnO3 composites

Table-like magnetocaloric effect due to field-induced inter-cluster interactions in Eu0.5Sr0.5MnO3–EuMnO3 composites

Unconventional electronic phase transition in SnBi2Te4: role of anomalous thermal expansion

Synthesis, Optical, Dielectric, SHG, Magnetic and Visible Light Driven Catalytic Studies on Compounds Belonging to the Swedenborgite Structure

Contact Info

Product

Resources

About

Table-like magnetocaloric effect due to field-induced inter-cluster interactions in Eu_0.5Sr_0.5MnO₃–EuMnO₃ composites

Table-like magnetocaloric effect due to field-induced inter-cluster interactions in Eu_0.5Sr_0.5MnO₃–EuMnO₃ composites

Unconventional electronic phase transition in SnBi₂Te₄: role of anomalous thermal expansion