Unconventional superparamagnetic behavior in the modified cubic spinel compound 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>LiNi</mml:mi><mml:mrow><mml:mn>0.5</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mi>Mn</mml:mi><mml:mrow><mml:mn>1.5</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:mrow></mml:math>

Islam, S. S.; Singh, Vikram; Somesh, K.; Mukharjee, Prashanta K.; Jain, Anil; Yusuf, S. M.; Nath, R.

doi:10.1103/physrevb.102.134433

Cited by 13 publications

(2 citation statements)

References 92 publications

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“…Furthermore, for fixed T m = 300 K, and at t wt = 100 s, the values of β show a non-monotonous dependency on H a , whereas the value of τ drops from 2767 s to 1146 s with the increase of H a from 100 to 500 Oe ( Figure 4 c). Overall, at 300 K (depending on the H a and t wt ), the value of β varies between 0.266 to 0.474, which is well within the range reported from different SPM systems [ 29 , 30 ]. Moreover, β < 1 signifies that the MND system involves multiple anisotropy energy barriers.…”

Section: Resultssupporting

confidence: 81%

Room Temperature Magnetic Memory Effect in Nanodiamond/γ-Fe2O3 Composites

et al. 2021

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We report a room temperature magnetic memory effect (RT-MME) from magnetic nanodiamond (MND) (ND)/γ-Fe2O3 nanocomposites. The detailed crystal structural analysis of the diluted MND was performed by synchrotron radiation X-ray diffraction, revealing the composite nature of MND having 99 and 1% weight fraction ND and γ-Fe2O3 phases, respectively. The magnetic measurements carried out using a DC SQUID magnetometer show the non-interacting superparamagnetic nature of γ-Fe2O3 nanoparticles in MND have a wide distribution in the blocking temperature. Using different temperature, field, and time relaxation protocols, the memory phenomenon in the DC magnetization has been observed at room temperature (RT). These findings suggest that the dynamics of MND are governed by a wide distribution of particle relaxation times, which arise from the distribution of γ-Fe2O3 nanoparticle size. The observed RT ferromagnetism coupled with MME in MND will find potential applications in ND-based spintronics.

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Section: Resultssupporting

confidence: 81%

Room Temperature Magnetic Memory Effect in Nanodiamond/γ-Fe2O3 Composites

et al. 2021

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“…[25] Further, our χ(T) analysis points towards the coexisting AFM and FM interactions in both the compounds. [26] This implies that there is significant inter-cluster coupling which is FM in nature.…”

Section: Compoundmentioning

confidence: 99%

Synthesis and Investigation of Magnetic Properties of Rod Shaped Micron Sized Ni₄ and Co₂Ni₂ Cluster based MOFs

Singha

Islam

Das

et al. 2021

Zeitschrift anorg allge chemie

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Two new metal cluster (Ni 4 and Co 2 Ni 2 ) based rod shaped micron sized metal-organic frameworks (MOFs) of formulas(compound-2), {OBA = 4,4'-Oxybis(benzoate)} are synthesized via solvothermal technique. Structural, morphological and magnetic properties of both the compounds are characterized using x-ray diffraction, infrared spectroscopy, thermogravimetric analysis, scanning electron microscopy, and DC magnetization measurements. The homogeneous presence of Co and Ni with a molar ratio of ~1 : 1 in compound-2 is confirmed by EDX elemental mapping analysis. Magnetic measurements reveal that both the compounds are magnetically frustrated due to competing antiferromagnetic (AFM) and ferromagnetic (FM) interactions.Compound-1 has dominant FM while compound-2 has dominant AFM interactions. At low temperatures, magnetic longrange-order sets in, which is identified to be canted FM and canted AFM type for compound-1 and 2, respectively. Below the ordering temperature, multiple magnetic transitions including spin-glass transitions are detected, which can be ascribed to the effect of strong frustration in both the compounds.

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Critical exponents and magnetic entropy change across the continuous magnetic transition in (La, Pr)-Ba manganites

Tozri

Kamel²,

Mohamed³

et al. 2022

Appl. Phys. A

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Unconventional superparamagnetic behavior in the modified cubic spinel compound LiNi0.5Mn1.5O4

Cited by 13 publications

References 92 publications

Room Temperature Magnetic Memory Effect in Nanodiamond/γ-Fe2O3 Composites

Room Temperature Magnetic Memory Effect in Nanodiamond/γ-Fe2O3 Composites

Synthesis and Investigation of Magnetic Properties of Rod Shaped Micron Sized Ni₄ and Co₂Ni₂ Cluster based MOFs

Critical exponents and magnetic entropy change across the continuous magnetic transition in (La, Pr)-Ba manganites

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Unconventional superparamagnetic behavior in the modified cubic spinel compound LiNi0.5Mn1.5O4

Cited by 13 publications

References 92 publications

Room Temperature Magnetic Memory Effect in Nanodiamond/γ-Fe2O3 Composites

Room Temperature Magnetic Memory Effect in Nanodiamond/γ-Fe2O3 Composites

Synthesis and Investigation of Magnetic Properties of Rod Shaped Micron Sized Ni4 and Co2Ni2 Cluster based MOFs

Critical exponents and magnetic entropy change across the continuous magnetic transition in (La, Pr)-Ba manganites

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Product

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Synthesis and Investigation of Magnetic Properties of Rod Shaped Micron Sized Ni₄ and Co₂Ni₂ Cluster based MOFs