Mukherjee, Arindam, Saha, Manas K, Rudra, Indranil, Ramasesha, Suryanarayanasastry, Nethaji, Munirathinam, Chakravarty, Akhil R
Alkoxo-phenoxo bridged tetranuclear copper(II) complexes $[Cu_4L_2(O_2CC_6H_4-p-OH)_2]$ (1) and $[Cu_4L_2(O_2CC_6H_4-o-OH)_2] (2)$ containing pentadentate Schiff base ligand...
Mukherjee, Arindam, Saha, Manas K, Rudra, Indranil, Ramasesha, Suryanarayanasastry, Nethaji, Munirathinam, Chakravarty, Akhil R
Alkoxo-phenoxo bridged tetranuclear copper(II) complexes $[Cu_4L_2(O_2CC_6H_4-p-OH)_2]$ (1) and $[Cu_4L_2(O_2CC_6H_4-o-OH)_2] (2)$ containing pentadentate Schiff base ligand...
Mukherjee, Arindam, Rudra, Indranil, Naik, Sunil G, Ramasesha, Suryanarayanasastry, Nethaji, Munirathinam, Chakravarty, Akhil R
Two new angular trinuclear copper(II) complexes of formulation [Cu3(HL)LL‘](ClO4), where L‘ is imidazole (Him, 1) or 1-methylimidazole (1-MeIm, 2) and H3L is a Schiff base obtained from the...
Properties of a mixed-valent iron compound with the kagome lattice (2003)
Rao, CNR, Paul, Geo, Choudhury, Amitava, Sampathkumaran, EV, Raychaudhuri, Arup K, Ramasesha, S, ...
An organically templated iron sulfate of the formula $[HN(CH_2)_6NH] [Fe^I^I^IFe_2^I^I F_6(SO_4)_2]\cdot[H_3O]$ possessing the kagome lattice has been prepared and characterized by single-crystal...
Properties of a mixed-valent iron compound with the kagome lattice (2003)
Rao, CNR, Paul, Geo, Choudhury, Amitava, Sampathkumaran, EV, Raychaudhuri, Arup K, Ramasesha, S, ...
An organically templated iron sulfate of the formula $[HN(CH_2)_6NH] [Fe^I^I^IFe_2^I^I F_6(SO_4)_2]\cdot[H_3O]$ possessing the kagome lattice has been prepared and characterized by single-crystal...
Characterization of the Energy Structure and Adiabatic Magnetization Process of V15 (2002)
Rudra, Indranil, Saito, K., Ramasesha, S., Miyashita, Seiji
The energy structure of the V$_{15}$ is studied using exact diagonalization methods, and the adiabatic changes of the magnetization in the system with the sweeping field are investigated. We confirm...
Rudra, Indranil, Ramasesha, S., Sen, Diptiman
We study the low-energy properties of Heisenberg antiferromagnetic spin-1/2 and spin-1 systems on various clusters made up of triangles. Some of the clusters have a geometry similar to representative...
Model Exact Low-Lying States and Spin Dynamics in Ferric Wheels; Fe$_6$ to Fe$_{12}$ (2002)
Rudra, Indranil, Ramasesha, S., Sen, Diptiman
Using an efficient numerical scheme that exploits spatial symmetries and spin-parity, we have obtained the exact low-lying eigenstates of exchange Hamiltonians for ferric wheels up to Fe$_{12}$. The...
Rudra, Indranil, Raghu, C., Ramasesha, S.
We have used a many-body model Hamiltonian to study the nature of the magnetic ground state of hetero-binuclear complexes involving rare-earth and copper ions. We have taken into account all diagonal...
An alternate model for magnetization plateaus in the molecular magnet $V_{15}$ (2001)
Rudra, Indranil, Ramasesha, S, Sen, Diptiman
Starting from an antiferromagnetic Heisenberg Hamiltonian for the 15 spin-1/2 ions in $V_{15}$, we construct an effective spin Hamiltonian involving eight low-lying states (spin-1/2 and spin-3/2)...
Synthesis and Spectroscopic Characterization of Highly Conducting $BF_3$-Doped Polyaniline (2001)
Chaudhuri, Debangshu, Kumar, Ashwani, Rudra, Indranil, Sarma, DD
Conducting polymers constitute an important class of materials because of their novel physical properties and the prospect of their application in various areas of technological importance....
Rudra, Indranil, Ramasesha, S, Sen, Diptiman
Beginning with a Heisenberg: spin Hamiltonian for the manganese ions in the Mn12Ac molecule, we find a number of model exact low-energy states of the system whose spectrum corresponds to the ordering...
Dynamic Oscillations of Magnetization in High Spin Magnetic Clusters (2001)
Rudra, Indranil, Ramasesha, S.
We have studied the time evolution of magnetization of a high spin magnetic cluster in the ground state, in the presence of a sinusoidal axial magnetic field and a static transverse field by...
Raghu, C., Rudra, Indranil, Sen, Diptiman, Ramasesha, S.
Using an efficient numerical scheme that exploits spatial symmetries and spin parity, we have obtained the exact low-lying eigenstates of exchange Hamiltonians for the high nuclearity spin clusters,...
An alternate model for magnetization plateaus in the molecular magnet $V_{15}$ (2001)
Rudra, Indranil, Ramasesha, S, Sen, Diptiman
Starting from an antiferromagnetic Heisenberg Hamiltonian for the 15 spin-1/2 ions in $V_{15}$, we construct an effective spin Hamiltonian involving eight low-lying states (spin-1/2 and spin-3/2)...
An alternate model for magnetization plateaus in the molecular magnet V_15 (2000)
Rudra, Indranil, Ramasesha, S., Sen, Diptiman
Starting from an antiferromagnetic Heisenberg Hamiltonian for the fifteen spin-1/2 ions in V_15, we construct an effective spin Hamiltonian involving eight low-lying states (spin-1/2 and spin-3/2)...
Evaluation of low-energy effective Hamiltonian techniques for coupled spin triangles (2000)
Raghu, C, Rudra, Indranil, Ramasesha, S, Sen, Diptiman
Motivated by recent work on Heisenberg antiferromagnetic spin systems on various lattices made up of triangles, we examine the low-energy properties of a chain of antiferromagnetically coupled...
Magnetization of Mn_12 Ac in a slowly varying magnetic field: an ab initio study (2000)
Rudra, Indranil, Ramasesha, S., Sen, Diptiman
Beginning with a Heisenberg spin Hamiltonian for the manganese ions in the Mn_12 Ac molecule, we find a number of low-energy states of the system. We use these states to solve the time-dependent...
Evaluation of low-energy effective Hamiltonian techniques for coupled spin triangles (2000)
Raghu, C., Rudra, Indranil, Ramasesha, S., Sen, Diptiman
Motivated by recent work on Heisenberg antiferromagnetic spin systems on various lattices made up of triangles, we examine the low-energy properties of a chain of antiferromagnetically coupled...
Evaluation of low-energy effective Hamiltonian techniques for coupled spin triangles (2000)
Raghu, C, Rudra, Indranil, Ramasesha, S, Sen, Diptiman
Motivated by recent work on Heisenberg antiferromagnetic spin systems on various lattices made up of triangles, we examine the low-energy properties of a chain of antiferromagnetically coupled...