School of Material Science and Technology: Recent submissions

Now showing items 61-80 of 128

Bright aspects of defects and dark traits of dopants in the photoluminescence of Er2X2O7:Eu3+(X = Ti and Zr) pyrochlore: An insight using EXAFS, positron annihilation and DFT

Gupta, S.K.; Sudarshan, K.; Jena, P.; Ghosh, P.S.; Yadav, A.K.; Jha, S.N.; Bhattacharya, D. (Royal Society of Chemistry, 2021-05-07)

Understanding the intricacies and fundamental processes of materials involved in dopant- and defect-based luminescence is of paramount importance for scientists and engineers working towards the design of solid-state ...
Injectable hydrogels of newly designed brush biopolymers as sustained drug-delivery vehicle for melanoma treatment

SHUKLA, A.; Singh, A.P.; Maiti, P. (Springer Nature, 2021-12)

Novel biocompatible and brush copolymers have been developed for cancer treatment using its controlled drug-release potential. Polyurethane graft on linear dextrin has been synthesized to control the hydrophilic–hydrophobic ...
Robust Bain distortion in the premartensite phase of a platinum-substituted Ni2MnGa magnetic shape memory alloy

Singh, S.; Dutta, B.; D'Souza, S.W.; Zavareh, M.G.; Devi, P.; Gibbs, A.S.; Hickel, T.; Chadov, S.; Felser, C.; Pandey, D. (Nature Publishing Group, 2017-12-01)

The premartensite phase of shape memory and magnetic shape memory alloys (MSMAs) is believed to be a precursor state of the martensite phase with preserved austenite phase symmetry. The thermodynamic stability of the ...
Hidden phase in parent Fe-pnictide superconductors

Ali, K.; Adhikary, G.; Thakur, S.; Patil, S.; Mahatha, S.K.; Thamizhavel, A.; De Ninno, G.; Moras, P.; Sheverdyaeva, P.M.; Carbone, C.; Petaccia, L.; Maiti, K. (American Physical Society, 2018-02-09)

We investigate the origin of exoticity in Fe-based systems via studying the fermiology of CaFe2As2 employing angle-resolved photoemission spectroscopy. While the Fermi surfaces (FSs) at 200 K and 31 K are observed to exhibit ...
Evidence for two spin-glass transitions with magnetoelastic and magnetoelectric couplings in the multiferroic (B i1-x B ax)(F e1-x T IX) O3 system

Kumar, A.; Kaushik, S.D.; Siruguri, V.; Pandey, D. (American Physical Society, 2018-03-02)

For disordered Heisenberg systems with small single ion anisotropy (D), two spin-glass (SG) transitions below the long-range ordered (LRO) phase transition temperature (Tc) have been predicted theoretically for compositions ...
Demonstration of reentrant relaxor ferroelectric phase transitions in antiferroelectric-based (Pb0.50Ba0.50)ZrO3 ceramics

pokharel, B.P.; Shrestha, L.K.; Ariga, K.; Pandey, D. (MDPI AG, 2018-04)

Herein we demonstrate a novel (Pb0.50Ba0.50)ZrO3 (PBZ50) ceramic that exhibits a reentrant relaxor ferroelectric phase transition in an antiferroelectric-based perovskite system. The dielectric measurement has confirmed ...
Donor-π-Acceptor-Type Configured, Dimethylamino-Based Organic Push-Pull Chromophores for Effective Reduction of Mild Steel Corrosion Loss in 1 M HCl

Tiwari, M.; Gupta, V.K.; Singh, R.A.; Ji, G.; Prakash, R. (American Chemical Society, 2018-04-30)

In this work, donor-π-acceptor-type four crystalline compounds have been tested for the first time to restrict the corrosion of mild steel in 1 M HCl. The details of the compounds are: C1, 4-N,N-dimethylamino-β-nitrostyrene; ...
Gradual pressure-induced change in the magnetic structure of the noncollinear antiferromagnet Mn3Ge

Sukhanov, A.S.; Singh, S.; Caron, L.; Hansen, T.; Hoser, A.; Kumar, V.; Borrmann, H.; Fitch, A.; Devi, P.; Manna, K.; Felser, C.; Inosov, D.S. (American Physical Society, 2018-06-01)

By means of powder neutron diffraction we investigate changes in the magnetic structure of the coplanar noncollinear antiferromagnet Mn3Ge caused by an application of hydrostatic pressure up to 5 GPa. At ambient conditions ...
Gradual pressure-induced change in the magnetic structure of the noncollinear antiferromagnet Mn3Ge

Sukhanov, A.S.; Singh, S.; Caron, L.; Hansen, T.; Hoser, A.; Kumar, V.; Borrmann, H.; Fitch, A.; Devi, P.; Manna, K.; Felser, C.; Inosov, D.S. (American Physical Society, 2018-06-01)

By means of powder neutron diffraction we investigate changes in the magnetic structure of the coplanar noncollinear antiferromagnet Mn3Ge caused by an application of hydrostatic pressure up to 5 GPa. At ambient conditions ...
Adaptive modulation in the N i2 M n1.4 i n0.6 magnetic shape-memory Heusler alloy

Devi, P.; Singh, S.; Dutta, B.; Manna, K.; D'Souza, S.W.; Ikeda, Y.; Suard, E.; Petricek, V.; Simon, P.; Werner, P.; Chadhov, S.; Parkin, S.S.P.; Felser, C.; Pandey, D. (American Physical Society, 2018-06-11)

The origin of incommensurate structural modulation in Ni-Mn based Heusler-type magnetic shape-memory alloys (MSMAs) is still an unresolved issue in spite of intense focus on it due to its role in the magnetic field induced ...
Reversible adiabatic temperature change in the shape memory Heusler alloy Ni2.2Mn0.8Ga: An effect of structural compatibility

Devi, P.; Zavareh, M. Ghorbani; Mejía, C. Salazar; Hofmann, K.; Albert, B.; Felser, C.; Nicklas, M.; Singh, Sanjay (American Physical Society, 2018-12-28)

The large magnetocaloric effect (MCE) observed in Ni-Mn based shape memory Heusler alloys put them forward to use in magnetic refrigeration technology. It is associated with a first-order magnetostructural (martensitic) ...
Scalable Synthesis of a Sub-10 nm Chalcopyrite (CuFeS2) Nanocrystal by the Microwave-Assisted Synthesis Technique and Its Application in a Heavy-Metal-Free Broad-Band Photodetector

Kumar, B.; Singh, S.V.; Chattopadhyay, A.; Biring, S.; Pal, B.N. (American Chemical Society, 2020-10-13)

A heavy-metal-free chalcopyrite (CuFeS2) nanocrystal has been synthesized via microwave-assisted growth. Large-scale nanocrystals with an average particle size of 5 nm are fabricated by this technique within a very short ...
Bi-functional ZnO nanoparticles as a reusable SERS substrate for nano-molar detection of organic pollutants

Majee, B.P.; Bhawana; Mishra, A.K. (Institute of Physics Publishing, 2019)

In order to identify the quality of water, detection of organic pollutants at very low concentrations is needed. In this work, hydrothermally grown ZnO nanoparticles (NPs) were used as a SERS active substrate for the ...
Textured heterogeneity in square artificial spin ice

Lee, J.C.T.; Mishra, S.K.; Bhat, V.S.; Streubel, R.; Farmer, B.; Shi, X.; De Long, L.E.; McNulty, I.; Fisher, P.; Kevan, S.D.; Roy, S. (American Physical Society, 2019-01-07)

We report evidence of spontaneous formation of a heterogeneous network of superdomains in two-dimensional square artificial spin ice nanostructures in externally applied magnetic fields. Coherent resonant soft-x-ray ...
Exploring the best scenario for understanding the high temperature thermoelectric behaviour of Fe2VAl

Sk, S.; Devi, P.; Singh, S.; Pandey, S.K. (Institute of Physics Publishing, 2019-02)

Heusler-type Fe2VAl compound is a promising thermoelectric candidate with non-magnetic ground state. The present work investigates the Seebeck coefficient (S) of Fe2VAl in the temperature region 300 to 620 K with the help ...
Supramolecular self-assembly, DNA interaction, antibacterial and cell viability studies of Cu(II) and Ni(II) complexes derived from NNN donor Schiff base ligand

Jana, K.; Das, S.; Puschmann, H.; Debnath, S.C.; Shukla, A.; Mahanta, A.K.; Hossain, M.; Maiti, T.; Samanta, B.C. (Elsevier S.A., 2019-03-01)

In the present study, synthesis of two complexes, namely [Cu(L)Cl2] (1) and [Ni(L)Cl(H2O)2)]Cl (2), where L = piperidin-2-yl-N-(1-(pyridin-2-yl) ethylidene)methanamine were reported along with their characterization by ...
Magnetic-field-induced incommensurate to collinear spin order transition in NiBr 2

Babu, S.; Prokeš, K.; Huang, Y.K.; Radu, F.; Mishra, S.K. (American Institute of Physics Inc., 2019-03-07)

The triangular spin lattice of NiBr 2 is a canonical example of the frustrated helimagnet that shows a collinear commensurate antiferromagnetic to an incommensurate spin helix phase transition on cooling. Herein, we have ...
Improved magnetostructural and magnetocaloric reversibility in magnetic Ni-Mn-In shape-memory Heusler alloy by optimizing the geometric compatibility condition Open Access

Devi, P.; Mejía, C.S.; Zavareh, M.G.; Dubey, K.K.; Kushwaha, P.; Skourski, Y.; Felser, C.; Nicklas, M.; Singh, S. (American Physical Society, 2019-06-17)

We report an improved reversibility of magnetostriction and inverse magnetocaloric effect (MCE) for the magnetic shape-memory Heusler alloy Ni1.8Mn1.8In0.4. We show that the magnetostriction and MCE crucially depends on ...
Evidence for cluster spin glass phase with precursor short-range antiferromagnetic correlations in the B -site disordered Ca(F e1/2 N b1/2) O3 perovskite

Kumar, A.; Senyshyn, A.; Pandey, D. (American Physical Society, 2019-06-18)

The origin of the spin glass (SG) phase in the well-known multiferroic Pb(Fe1/2Nb1/2)O3 compound remains controversial due to the complications introduced by the coexistence of SG and long-range ordered (LRO) antiferromagnetic ...
Evidence for pressure-induced polarization rotation, octahedral tilting, and reentrant ferroelectric phase in tetragonal (P b0.5 B i0.5)(T i0.5 F e0.5) O3

Singh, P.; Upadhyay, C.; Konôpková, Z.; Liermann, H.-P.; Pandey, D. (American Physical Society, 2019-09-11)

Pressure-induced phase transition in the technologically important tetragonal phase of PbTiO3 has been quite controversial with two entirely different propositions: (1) morphotropic phase boundary-like structural transition ...

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