47 citations · 283 across the 26 of their papers we have counts for
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Displacive-type ferroelectricity from magnetic correlations within spin-chain
Tathamay Basu, V. V. Ravi Kishore, Smita Gohil +8
Observation of ferroelectricity among non-d0 systems, which was believed for a long time an unrealistic concept, led to various proposals for the mechanisms to explain the same (i.…
A reentrant phenomenon in magnetic and dielectric properties of Dy2BaNiO5 and an intriguing influence of external magnetic field
Tathamay Basu, P. L. Paulose, Kartik K Iyer +5
We report that the spin-chain compound Dy2BaNiO5 recently proven to exhibit magnetoelectric coupling below its Neel temperature (T_N) of 58 K, exhibits strong frequency-dependent b…
Isothermal magnetic entropy behavior in Tb5Si3: Sign reversal and non-monotonic variation with temperature, and implications
Niharika Mohapatraa, Sitikantha D. Das, K. Mukherjee +1
The magnetic entropy change (\DeltaS), a measure of the magnetocaloric effect, in Tb5Si3, a compound exhibiting unusual positive magnetoresistance following a magnetic-field-induce…
Magnetism of fine particles of Kondo lattices, obtained by high-energy ball-milling
E. V. Sampathkumaran, K. Mukherjee, Kartik K Iyer +2
Despite intense research in the field of strongly correlated electron behavior for the past few decades, there has been very little effort to understand this phenomenon in nano par…
An anomalous butterfly-shaped magnetoresistance loop in an alloy, Tb4LuSi3
K. Mukherjee, Sitikantha D Das, Niharika Mohapatra +2
Magnetic-field (H) induced first-order magnetic transition and the assiciated electronic phase-separation phenomena are active topics of research in magnetism. Magnetoresistance (M…
Influence of pressure on the magnetic behavior and the anomalous magnetoresistance in Tb5Si3
Niharika Mohapatra, Sitikantha D Das, K. Mukherjee +2
The compound, Tb5Si3, crystallizing in Mn5Si3-type hexagonal structure, was recently reported by us to exhibit a sudden and huge enhancement in electrical resistivity (rho) at a cr…
Insensitivity of magnetic anomalies in Sr3NiPtO6 to positive and negative pressures
S. Narayana Jammalamadaka, Niharika Mohapatra, Karthik K Iyer +1
The compound, Sr3NiPtO6, belonging to a K4CdCl6-type rhombohedral structure, has been reported not to exhibit magnetic ordering at least down to 1.8 K, despite a relatively large v…
Magnetic behavior of nanocrystalline ErCo2
Sitikantha D Das, Niharika Mohapatra, Kartik K Iyer +2
We have investigated the magnetic behavior of the nanocrystalline form of a well-known Laves phase compound, ErCo2 - the bulk form of which has been known to undergo an interesting…
Magnetic anomalies in nanocrystalline Ca3CoRhO6, a geometrically frustrated spin-chain compound,
Niharika Mohapatra, Kartik K Iyer, B. A. Chalke +1
We have investigated the magnetic behavior of the nano crystals, synthesized by high-energy ball-milling, for a well-known geometrically frustrated spin-chain system, Ca3CoRhO6, an…
Magnetic behavior of nano crystals of a spin-chain system, Ca3Co2O6: Absence of multiple steps in the low temperature isothermal magnetization
Niharika Mohapatra, Kartik K Iyer, Sitikantha D Das +3
We report that the major features in the temperature dependence of dc and ac magnetization of a well-known spin-chain compound, Ca3Co2O6, which has been known to exhibit two comple…
Enhancement of positive magnetoresistance following a magnetic-field-induced ferromagnetic transition in an intermetallic compound, Tb5Si3
S. Narayana Jammalamadaka, Niharika Mohapatra, Sitikantha D Das +1
We report the existence of a field-induced ferromagnetic transition in the magnetically ordered state (<69 K) of an intermetallic compound, Tb5Si3, and this transition is distinctl…
Magnetic anomalies in Gd6Co1.67Si3 and Tb6Co1.67Si3
S. Narayana Jammalamadaka, Niharika Mohapatra, Sitikantha D Das +2
The compounds, Gd6Co1.67Si3 and Tb6Co1.67Si3, recently reported to form in a Ce6Ni2Si3-derived hexagonal structure (space group: P6_3 / m) and to order magnetically below 295 and 1…
Magnetic anomalies in Nd6Co(1.67)Si3: Surprising first order transitions in the low-temperature isothermal magnetization
Niharika Mohapatra, S. Narayana Jammalamadaka, Sitikantha D. Das +1
We present the results of magnetic measurements on Nd6Co(1.67)Si3, a compound recently reported to crystallize in a hexagonal structure (space group P6_3/m) and to undergo long ran…
Stability of geometrically frustrated magnetic state of Ca3CoRhO6 to applications of positive and negative pressure
Niharika Mohapatra, Kartik K Iyer, Sudhindra Rayaprol +2
The influence of negative chemical pressure induced by gradual replacement of Ca by Sr as well as of external pressure (up to 10 kbar) on the magnetism of Ca3CoRhO6 has been invest…
An insight into spin-chain magnetism through Moessbauer spectroscopic investigations in Eu-doped Ca3Co2O6 and Ca3CoRhO6
P. L. Paulose, Niharika Mohapatra, E. V. Sampathkumaran
We report the results of 151Eu Moessbauer effect and magnetization measurements in the Eu-doped Ca3Co2O6 and Ca3CoRhO6, which are of great current interest in the fields of spin-ch…
Magnetic anomalies in single crystalline ErPd2Si2
E. V. Sampathkumaran, Niharika Mohapatra, Kartik K Iyer +3
Considering certain interesting features in the previously reported 166Er Moessbauer effect and neutron diffraction data on the polycrystalline form of ErPd2Si2 crystallizing in Th…
Large magnetocaloric effect in Gd4Co3
Niharika Mohapatra, Kartik K Iyer, E. V. Sampathkumaran
We report a large entropy change (DeltaS) below 300 K, peaking near TC= 220 K, due to isothermal change of magnetic field, for Gd4Co3, with a refrigeration capacity higher than tha…
Geometrically frustrated magnetic behavior of Sr3NiRhO6 and Sr3NiPtO6
Niharika Mohapatra, Kartik K Iyer, Sudhindra Rayaprol +1
The results of ac and dc magnetic susceptibility isothermal magnetization and heat-capacity measurements as a function of temperature (T) are reported for Sr3NiRhO6 and Sr3NiPtO6 c…
Effect of a small disruption of the Ca site on the geometrically frustrated magnetic behavior of Ca3CoRhO6
Niharika Mohapatra, E. V. Sampathkumaran
The compound, Ca3CoRhO6, containing magnetic Co-Rh chains intervened by Ca ions, has been known to be one of the few exhibiting partially disordered antiferromagnetic structure (PD…
Magnetic anomalies in a spin-chain compound, Sr3CuRhO6: Griffiths-phase-like behavior of magnetic susceptibility
E. V. Sampathkumaran, Niharika Mohapatra, Sudhindra Rayaprol +1
We report the results of ac and dc magnetic susceptibility (chi), heat-capacity (C), isothermal magnetization and isothermal remanent magnetization measurements on the compound, Sr…