Magnetic phases evolution in the LaMn1-xFexO3+y system (2008)
De Lima, O. F., Coaquira, J. A. H., De Almeida, R. L., De Carvalho, L. B., Malik, S. K.
We have investigated the crystal structure and magnetic properties for polycrystalline samples of LaMn1-xFexO3+y, in the whole range x=0.0 to x=1.0, prepared by solid state reaction in air. All...
Kumar, Rakesh, Tomy, C. V., Paulose, P. L., Nagarajan, R., Malik, S. K.
Anomalous magnetic and transport properties observed in the La0.8-xEuxSr0.2MnO3 (0.04 l.e x l.e. 0.36) compounds are presented in this paper. The Curie temperature (TC) decreases from 260 K for x =...
Magnetocaloric effect in R2Ti3Ge4 (R = Gd, Tb and Er) Compounds (2007)
Nirmala, R., Kundaliya, Darshan C., Morozkin, A. V., Malik, S. K.
Heat capacity of polycrystalline R2Ti3Ge4 (R = Gd, Tb and Er) compounds (Orthorhombic, Sm5Ge4-type, Space group Pnma) has been studied in the temperature range of 1.8 K to 300 K in various applied...
Shekhar, Chandra, Giri, Rajiv, Tiwari, R. S., Malik, S. K., Srivastava, O. N.
We report the synthesis and characterization of graphite (C) doped MgB2-xCx (x = 0.0, 0.1, 0.2 and 0.3) samples. The crystal structure and microstructural characterization have been investigated by...
The tetragonal layered compounds TbTiGe and ErTiGe order antiferromagnetically at 276 K and 39 K, respectively. Partial substitution of Mo for Ti in these two compounds modifies the magnetic...
Kumar, Rakesh, Tomy, C. V., Nagarajan, R., Paulose, P. L., Malik, S. K.
Here we report the magnetic and heat capacity studies of the double perovskite com-pounds Ba2SmRuO6 and Ba2DyRuO6. Antiferromagnetic transitions are inferred at 54 K and 47 K in Ba2SmRuO6 and...
Magnetic, magneto-thermal and magneto-transport properties in SmMn2Si2-xGex compounds (2007)
Kumar, Pramod, Suresh, K. G., Nigam, A. K., Malik, S. K.
The effect of Ge substitution for Si in SmMMn2Si2-xGex compounds has been studied. The Sm ordering temperature is found to be much larger in the compound with x=2, as compared to the compounds with...
Multiple magnetic transitions and magnetocaloric effect in Gd1-xSmxMn2Ge2 compounds (2007)
Kumar, Pramod, Singh, Niraj K., Suresh, K. G., Nigam, A. K., Malik, S. K.
Magnetic and magnetocaloric properties of polycrystalline samples of Gd1-xSmxMn2Ge2 have been studied. All the compounds except GdMn2Ge2 show re-entrant ferromagnetic behavior. Multiple magnetic...
Shekhar, Chandra, Giri, Rajiv, Tiwari, R. S., Malik, S. K., Srivastava, O. N.
In the present investigation, we report a systematic study of Ag admixing in MgB2 prepared by solid-state reaction at ambient pressure. All the samples in the present investigation have been...
Heat capacity and magnetocaloric effect in polycrystalline Gd1-xSmxMn2Si2 (2006)
Kumar, Pramod, Singh, Niraj K., Suresh, K. G., Nigam, A. K., Malik, S. K.
We report the magnetocaloric effect in terms of isothermal magnetic entropy change as well as adiabatic temperature change, calculated using the heat capacity data. Using the zero field heat capacity...
Parmar, R. N., Markna, J. H., Kuberkar, D. G., Kumar, Ravi, Rana, D. S., Bagve, Vivas C., ...
Epitaxial thin films of La0.7Ba0.3MnO3 manganite, deposited using Chemical Solution Deposition technique, were irradiated by 200 MeV Ag+15 ions with a maximum ion dose up to 1x10^12 ions/cm2....
Singh, Niraj K., Suresh, K. G., Rana, D. S., Nigam, A. K., Malik, S. K.
We report the magnetic, magnetocaloric and magnetoresistance results obtained in Tb(Ni1-xFex)2 compounds with x=0, 0.025 and 0.05. Fe substitution leads to an increase in the ordering temperature...
Correlation between magnetism and magnetocaloric effect in RCo2-based Laves phase compounds (2006)
Singh, Niraj K., Suresh, K. G., Nigam, A. K., Malik, S. K., Coelho, A. A., Gama, S.
By virtue of the itinerant electron metamagnetism (IEM), the RCo2 compounds with R=Er, Ho and Dy are found to show first order magnetic transition at their ordering temperatures. The inherent...
Kumar, Pramod, Singh, Niraj K., Suresh, K. G., Nigam, A. K., Malik, S. K.
The effect of Ge substitution on the magnetization, heat capacity, magnetocaloric effect and magnetoresistance of GdMn2Si2-xGex (x=0, 1, and 2) compounds has been studied. The magnetic transition...
Large magnetoresistance in intermetallic compounds R2Mn3Si5 (R = Tb, Dy and Ho) (2006)
Nirmala, R., Malik, S. K., Morozkin, A. V., Yamamoto, Y., Hori, H.
Magnetization (M) and magnetoresistance (MR) measurements on polycrystalline R2Mn3Si5 (R = Tb, Dy and Ho) compounds (tetragonal, space group P4/mnc) have been carried out in the temperature range of...
Rana, D. S., Ziese, M., Malik, S. K.
Temperature- and magnetic field-dependent electrical noise and electrical resistivity measurements were carried out on epitaxial thin films of a large bandwidth La0.7Sr0.3MnO3 and a disordered...
Magnetic avalanche-like behavior in disordered manganite (Eu0.4La0.1)(Sr0.4Ca0.1)MnO3 (2006)
The half-doped manganite, (Eu0.4La0.1)(Sr0.4Ca0.1)MnO3, has been found to exhibit sharp step-like metamagnetic transitions below 5 K. The number of magnetic steps increases with decreasing...
Magnetic Properties of Ternary Gallides of type RNi4Ga (R = Rare earths) (2005)
Joshi, Devang A., Nagarajan, R., Malik, S. K.
The magnetic properties of RNi4Ga (R = La, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm and Lu) compounds have been investigated. These compounds form in a hexagonal CaCu5 type structure with a space group...
Magnetic and transport properties of Mo substituted La0.67Ba0.33Mn1-xMoxO3 perovskite system (2005)
Kundaliya, Darshan C., Vij, Reeta, Kulkarni, R. G., Varughese, B., Nigam, A. K., Malik, S. K.
The effect of doping Mo for Mn on the magnetic and transport properties of the colossal magnetoresistance material, La0.67Ba0.33MnO3, has been studied. Compounds of the series La0.67Ba0.33Mn1-xMoxO3...
Effect of La Doping on Microstructure and Critical Current Density of MgB2 (2005)
Shekhar, Chandra, Giri, Rajiv, Tiwari, R S, Rana, D S, Malik, S K, Srivastava, O N
In the present study, La-doped MgB_2 superconductors with different doping level (Mg1-xLaxB2; x=0.00, 0.01, 0.03 & 0.05) have been synthesized by solid-state reaction route at ambient pressure....
Singh, Yogesh, Nirmala, R., Ramakrishnan, S., Malik, S. K.
We have performed bulk measurements such as dc magnetic susceptibility, electrical resistivity and heat capacity on the pseudo-ternary alloys Lu$_5$Ir$_4$(Si$_{1-x}$Ge$_x$)$_{10}$ to study the...
High temperature magnetic ordering in La2RuO5 (2005)
Malik, S. K., Kundaliya, Darshan C., Kale, R. D.
Magnetic susceptibility, heat capacity and electrical resistivity measurements have been carried out on a new ruthenate, La2RuO5 (monoclinic, space group P21/c) which reveal that this compound is a...
Magnetism in C60 Films Induced by Proton Irradiation (2005)
Mathew, S., Satpati, B., Joseph, B., Dev, B. N., Nirmala, R., Malik, S. K.
It is shown that polycrystalline fullerene thin films on hydrogen passivated Si(111) substrates irradiated by 2 MeV protons displays ferromagnetic-like behavior at 5 K. At 300 K both the pristine and...
The effect of Cu-doping on the magnetic and transport properties of La0.7Sr0.3MnO3 (2005)
Kim, M. S., Yang, J. B., Cai, Q., Zhou, X. D., James, W. J., Yelon, W. B., ...
The effects of Cu-doping on the structural, magnetic, and transport properties of La0.7Sr0.3Mn1-xCuxO3 (0 < x < 0.20) have been studied using neutron diffraction, magnetization and magnetoresistance...
Structure, magnetic and transport properties of Ti-substituted La0.7Sr0.3MnO3 (2005)
Kim, M. S., Yang, J. B., Cai, Q., Zhou, X. D., James, W. J., Yelon, W. B., ...
Ti-substituted perovskites, La0.7Sr0.3Mn1-xTixO3, with x between 0 to 0.20, were investigated by neutron diffraction, magnetization, electric resistivity, and magnetoresistance (MR) measurements. All...
Magnetocaloric effect in the intermetallic compound DyNi (2005)
Tripathy, S. K., Suresh, K. G., Nirmala, R., Nigam, A. K., Malik, S. K.
Magnetic and heat capacity measurements have been carried out on the polycrystalline sample of DyNi which crystallizes in the orthorhombic FeB structure (space group Pnma). This compound is...
Heat capacity and magnetoresistance in Dy(Co,Si)2 compounds (2005)
Singh, Niraj K., Suresh, K. G., Nigam, A. K., Malik, S. K.
Magnetocaloric effect and magnetoresistance have been studied in Dy(Co1-xSix)2 [x=0, 0.075 and 0.15] compounds. Magnetocaloric effect has been calculated in terms of adiabatic temperatue change...
Magnetic and Transport Properties of Ternary Indides of type R2CoIn8 (R = Ce, Pr and Dy) (2005)
Joshi, Devang A., Tomy, C. V., Paulose, P. L., Nagarajan, R., Nirmala, R., Malik, S. K.
We have synthesized and investigated the magnetic and transport properties of a series of compounds, R2CoIn8 (R = rare earth). Compounds form in single phase with a tetragonal structure (space group...
Observation of magnetoelectric behavior at room temperature in Pb(Fe1-xTix)O3 (2005)
The coexistence of ferroelectric and ferromagnetic properties at room temperature is very rarely observed. We have been successful in converting ferroelectric PbTiO3 into a magnetoelectric material...
Magnetism and Transport in YbMn2Sb2 (2005)
Nirmala, R., Malik, S. K., Morozkin, A. V., Suresh, K. G., ...
A new ternary intermetallic compound, namely, YbMn2Sb2, has been synthesized and its magnetic and electrical transport properties have been studied in the temperature range of 2 to 300 K. This...
Rana, D. S., Thaker, C. M., Mavani, K. R., Kuberkar, D. G., Malik, S. K.
Magnetoresistance (MR) and magnetization (d.c and a.c) measurements have been carried out on the manganites, (La0.7-2xEux)(Ca0.3Srx)MnO3 (0.05
Resistivity and Thermoelectric power of NaxCoO2 (x =1.0, 0.7 and 0.6) system (2004)
Kishan, H., Awana, V. P. S., Ansari, M. A., Gupta, Anurag, Saxena, R. B., Ganesan, V., ...
Results of thermo-electric power (S) and electrical resistivity (r) measurements are reported on NaxCoO2 compounds with x = 1.0, 0.7 and 0.6. These are single-phase compounds crystallizing in the...
Synthesis, structure and magnetization studies on (Fe1-xCrx)2TeO6 tellurate system (2004)
Mudher, K. D. Singh, Krishnan, K., Gopalakrishnan, I. K., Kundaliya, Darshan C., Malik, S. K.
The effect of substitution of Fe by Cr on the structural and magnetic properties of Fe2TeO6 in the system (Fe1-xCrx)2TeO6, (0
Growth and magnetic properties of MnO2−delta nanowire microspheres (2004)
Yang, J. B., Zhou, X. D., James, W. J., Malik, S. K., Wang, C. S.
We report the synthesis of MnO2−delta microspheres using hydrothermal and conventional chemical reaction methods. The microspheres of MnO2−delta consist of nanowires having a diameter of...
Awana, V. P. S., Ansari, M. A., Gupta, Anurag, Saxena, R. B., Kishan, H., Rawat, Rajeev, ...
Samples of Y0.4Pr0.6Ba2-xSrxCu3O7 have been synthesized by a solid- state reaction route. The samples with x = 0.60 crystallize in an orthorhombic structure (with orthorhombic distortion decreasing...
Das, D., Raj, M. R., Bahadur, D., Srivastava, C. M., Nigam, A. K., Malik, S. K.
We have been able to synthesize Lu+3 substituted La0.67Ca0.33MnO3 (LCMO) by an auto-combustion method. Synthesis of this compound is not successful by conventional ceramic or other chemical methods....
Magneto-transport studies on (Pr1/3Sm2/3)2/3A1/3MnO3 (A = Ca, Sr and Ba) compounds (2004)
Asthana, Saket, Bahadur, D., Nigam, A. K., Malik, S. K.
Magnetic and transport properties of (Pr1/3Sm2/3)2/3A1/3MnO3 (A = Ca, Sr and Ba) compounds, prepared by the citrate gel route, have been investigated. These compounds are found to crystallize in the...
Properties of magnetite nanoparticles synthesized through a novel chemical route (2004)
Thapa, Deepa, Palkar, V. R., Kurup, M. B., Malik, S. K.
We have developed a simple precipitation route to synthesize magnetite (Fe3O4) nano-particles with controlled size without any requirement of calcination step at high temperatures. The study of these...
Superconductivity in the intermetallic compound YRhAl (2004)
Kundaliya, Darshan C., Malik, S. K.
The intermetallic compound, YRhAl, has been prepared and is found to be isomorphic with RRhAl (R=Pr, Nd, Gd, Ho and Tm) compounds crystallizing in the orthorhombic TiNiSi-type structure (Space group...
Magnetoelectricity at room temperature in Bi0.9-xTbxLa0.1FeO3 system (2004)
Palkar, V. R., Malik, S. K., Bhattacharya, S., Kundaliya, Darshan C.
Magnetoelectric compounds with the general formula, Bi0.9-xRxLa0.1FeO3 (R =Gd, Tb, Dy, etc.), have been synthesized. These show the coexistence of ferroelectricity and magnetism, possess high...
Awana, V. P. S., Ansari, M. A., Gupta, Anurag, Saxena, R. B., Kishan, H., Buddhikot, Devendra, ...
The RuSr2Gd1.5Ce0.5Cu2O10-d (Ru-1222) compounds, with varying oxygen content, crystallize in a tetragonal crystal structure (space group I4/mmm). Resistance (R) versus temperature (T) measurements...
Systematic induction of superconductivity in Y1-xCaxBa2Cu3O6.3 system (2004)
Awana, V. P. S., Gupta, Anurag, Ansari, M. A., Samanta, S. B., Saxena, R. B., Kishan, H., ...
Compounds of series YBa2Cu3O7-d (d = 0.7), being synthesized by solid-state synthesis route with x = 0.0, 0.10, 0.15 and 0.20, crystallize in single-phase form with tetragonal structure (space group...
Awana, V. P. S., Gupta, Anurag, Kishan, H., Malik, S. K., Yelon, W. B., Linden, J., ...
MSr2Y1.5Ce0.5Cu2Oz (M-1222) compounds, with M = Fe and Co, have been synthesized through a solid-state reaction route. Both compounds crystallize in a tetragonal structure (space group I4/mmm). A...
Superconductivity of up to 80 K for Tb-123 - TbSr2Cu2.7Mo0.3O7 (2003)
Awana, V. P. S., Kishan, H., Takayama-Muromachi, E., Watanabe, T., Karppinen, M., Yamauchi, H., ...
The Tb-123 phase has been synthesized in single-phase form with the composition TbSr2Cu2.7Mo0.3O7 by solid-state reaction route and its phase purity is confirmed by neutron powder diffraction...
Rayaprol, S., Mavani, Krushna, Thaker, C. M., Rana, D. S., Kulkarni, R. G., Kuberkar, D. G., ...
Mo-substituted triple perovskite superconducting samples with the stoichiometric composition La(1.5)Nd(0.5)Ca(1)Ba(2)[Cu(1-x)Mo(x)](5)O(z), [LNCBCuMO] with x = 0.00, 0.01, 0.03, 0.05 and 0.10, have...
Awana, V. P. S., Nakamura, J., Karppinen, M., Yamauchi, H., Malik, S. K.
Pr0.9Sr0.1CoO2.99 sample exhibits magnetoresistivity (MR) of up to 40 % at 5 K with a strong hysteresis/memory effect. Magnetisation measurements on Pr0.9Sr0.1CoO2.99 in an applied field of 100 Oe...
Awana, V. P. S., Takayama-Muromachi, E., Malik, S. K., Yelon, W. B., Karppinen, M., Yamauchi, H.
Various MSr2YCu2Oz (M1212 with M = Fe, Co, Al and Ga) compounds have been synthesized through a solid state reaction route. All these compounds are derived from the basic CuBa2YCu2O7 structure....
Magnetic Characteristics of R6Mn23 Hydrides (R = Gd, Ho or Er), (2002)
Pourarian,F., Boltich,E. B., Wallace,W. E., Craig,R. S., Malik,S. K.
Effect of Absorbed Hydrogen on Magnetic Ordering in Tb6Mn23 and Dy6Mn23, (2002)
Pourarian,F., Boltich,E. B., Wallace,W. E., Malik,S. K.
Presented at the International Symposium on the Properties and Applications of Metal Hydrides, Colorado Springs, CO., 7-11 Apr 80.
Magnetic Behavior of the Hydrides of Th7Fe3, Th7Co3 and Th7Ni3, (2002)
Boltich,E. B., Malik,S. K., Wallace,W. E.
Presented at the International Symposium on the Properties and Applications of Metal Hydrides, Colorado Springs, CO, 7-11 Apr 80.
Joshi, Amish G., Pillai, C. G. S., Raj, P., Malik, S. K.
Magnetization studies have been carried out on superconducting MgB$_2$ (T$_c$=37K) in the temperature range of 2-50K and in magnetic field up to 5 Tesla. From these measurements, values of the lower...
Magnetization and heat capacity of R1/3Sr2/3FeO3-δ (R = La and Pr) (2001)
Awana, V. P. S., Karppinen, M., Yamauchi, H., Malik, S. K., Yelon, W. B., Mehta, A., ...
Neutron scattering studies on CeRhSb and PrTSb (T=Rh and Pd) compounds (1999)
Adroja, D T, Rainford, B D, Malik, S K, Takeya, H, Gschneider, K A, Pecharsky, V K
Neutron scattering studies on CeRhSb (1999)
Menon, L, Adroja, D T, Rainford, B D, Malik, S K, Yelon, W B
Influence of Hydrogen on Structure and Magnetic Properties of Ho6Fe23 and Er6Fe23, (1998)
Boltich,E. B., Pourarian,F., Wallace,W. E., Smith,H. K., Malik,S. K.
Effect of Si Addition on the Valence State of Ce IN CePd3, (1998)
Malik,S. K., Vijayaraghavan,R., Boltich,E. B., Craig,R. S., Wallace,W. E.
Magnetic and superconducting properties of Pr in La12xPrxBaCaCu3O7 system with 0.0< x (1998)
Awana, V. P. S., Dou, S. X., Singh, R., Narlikar, A. V., Malik, S. K., Yelon, W. B.
We report the results on structural aspects, magnetic, and superconducting properties of the La1-xPrxBaCaCu3O7 system. Both x-ray and neutron diffraction studies reveal that Pr substitutes...
Structural and magnetic properties of RSr2Fe3O9 (R=La, Y, Pr, and Gd) (1998)
Awana, V. P. S., Dou, S. X., Felner, I., Nowik, I., Malik, S. K., Mehta, A., ...
We have investigated the RSr2Fe3O9 (R=La, Y, Pr, and Gd) materials by several experimental techniques, including x-ray and neutron diffraction, magnetic susceptibility, and Mossbauer spectroscopy...