A5013679981- Advanced Condensed Matter Physics
- Magnetic and transport properties of perovskites and related materials
- Multiferroics and related materials
- Physics of Superconductivity and Magnetism
- Ferroelectric and Piezoelectric Materials
- Microwave Dielectric Ceramics Synthesis
- Electronic and Structural Properties of Oxides
- Magnetic Field Sensors Techniques
- Advanced ceramic materials synthesis
- Theoretical and Computational Physics
- Seismology and Earthquake Studies
Korea Institute of Ceramic Engineering and Technology
2022-2023
Jawaharlal Nehru University
2016-2020
University of California, Santa Cruz
2007
Results are presented of single crystal structural, thermodynamic, and reflectivity measurements the double-perovskite Ba2NaOsO6. These characterize material as a 5d^1 ferromagnetic Mott insulator with an ordered moment ~0.2 Bohr magnetons per formula unit TC = 6.8(3) K. The magnetic entropy associated this phase transition is close to Rln2, indicating that quartet groundstate anticipated from consideration structure split, consistent scenario in which ferromagnetism orbital ordering.
We have investigated the effect of site dilution with substitution nonmagnetic element in SrRu1-x Ti x O3 (x ⩽ 0.7). The nature ferromagnetic state SrRuO3 is believed to be itinerant type transition temperature [Formula: see text] K. Crystallographically, has a distorted orthorhombic structure. Substitution (3d 0) for Ru+4 (4d 4), however, does not introduce significant structural modification due their matching ionic radii. This substitution, on other hand, expected tune electronic...
Here, we report an evolution of structural, magnetic and transport behavior in doped SrRu1-x Ga x O3 (x [Formula: see text] 0.2). The nonmagnetic dopant Ga3+ (3d 10) not only acts for site dilution SrRuO3 but also modifies the Ru charge state electronic density. Our studies show that substitution does affect original orthorhombic- Pbnm structure which is due to its matching ionic radii with Ru4+ . However, has a substantial effect on where it decreases both moment as well transition...
Here we report the structural, magnetic and transport properties in La doped SrRuO3. The doping of La3+ modifies ionic state Ru by converting Ru4+ to Ru+3. However, there is modification lattice parameters as has smaller radii than that Sr2+. We find weakens ferromagnetic SrRuO3 terms lowering Tc decreasing moment. electrical resistivity shows metallic behavior whole temperature range, however, increases with La.
Here, we study the electrical transport and specific heat in 4$d$ based ferromagnetic material SrRuO$_3$ its Ti substituted SrRu$_{1-x}$Ti$_x$O$_3$ series ($x$ $\le$ 0.7). The is a metal shows itinerant ferromagnetism with transition temperature $T_c$ $\sim$ 160 K. nonmagnetic Ti$^{4+}$ (3$d^0$) substitution would not only weaken active Ru-O-Ru channel but also expected to tune electronic density electron correlation effect. A insulator has been observed around $x$ 0.4. nature of charge...
Evolution of structural and magnetic properties have been investigated in Y doped SrRuO3. The SrRuO3 is believed to itinerant type magnetism with ordering temperature ∼160 K. substitution nonmagnetic Y+3, which expected induce modifications change the Ru ionic state, does not Tc. moment at low field increases on contrary view charge state. estimated critical exponent related magnetization shows state changes localized model doing.
We study the effects of Ir substitution at Ru site in SrRuO3, by evolution structural and magnetic properties SrRuO3. The analysis shows without change orthorhombic structure substitution, lattice parameters increases. By dc magnetization decreases with decreasing ferromagnetic (FM) interaction. low-temperatureiso-thermal also substitution. Rhodes-Wohlfarth ratio calculation that itinerant nature increases
Here we report the evolution of structural, magnetic and transport behavior in perovskite based ruthenates Sr1-xPrxRuO3 (x=0.0 0.1). The substitution Pr on Sr site retains orthorhombic structure while find slight change structural parameters. SrRuO3 has itinerant ferromagnet (FM) type nature ordering temperature ∼160 K below transition showing large bifurcation between ZFC FC magnetization. By doping, moment decreases with decreasing FC. data show three distinct peaks (three temperature;...
In this, we report the study of structural and magnetic behavior in Ru-based doped perovskite structure SrRuO <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</inf> SrRu xmlns:xlink="http://www.w3.org/1999/xlink">0.9</inf> M xmlns:xlink="http://www.w3.org/1999/xlink">0.1</inf> O (M = Ti Ga). has an orthorhombic which not change by Ga as well doping also shows decreasing lattice parameters. The known to itinerant ferromagnet (FM) with Tc ~160K...