Koushik Karmakar

Crystal Growth of the Nonmagnetic Zn2+ and Magnetic Co2+ Doped Quasi-One-Dimensional Spin Chain Compound SrCuO2 Using the Traveling Solvent Floating Zone Method

We report on the crystal growth of the quasi-one-dimensional quantum spin chain compound SrCuO2 and its doped variants containing magnetic cobalt (0.25%, 0.5%, 1%, and 2.5%) and nonmagnetic zinc (0.5% and 1%) impurities. Crystals are grown using the traveling solvent floating zone (TSFZ) method in a four-mirror optical furnace. Some crucial factors, key to the stability of a TSFZ process, including the choice of solvent composition and its associated melting behavior, are discussed in detail. The grown crystals were characterized using X-ray powder diffraction, scanning electron microscopy, optical microscopy, neutron single crystal diffraction and magnetic susceptibility measurements. Co-doping induces magnetic anisotropy and a corresponding change of magnetic behavior characterized by the presence of a sharp peak in the magnetic susceptibility at low-temperatures (T = 5 K), which is not seen for the pristine compound. The peak position is shown to scale linearly with Co-concentration for low doping leve...

Finite-size effects in the quasi-one-dimensional quantum magnetsSr2CuO3,Sr2Cu0.99M0.01O3(M=Ni,Zn),andSrCuO2

We studied the finite-size effects on the magnetic behavior of the quasi-one-dimensional spin S =

Impurities in the weakly coupled quantum spin chains Sr2CuO3 and SrCuO2

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Effect of different in-chain impurities on the magnetic properties of the spin chain compound SrCuO2 probed by NMR

Heisenberg antiferromagnets Sr

Structural and magnetic investigations on a wet chemically synthesized nanoscale S = 1/2 spin chain compound – CuSe2O5

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Effects of Quantum Spin-1/2 Impurities on the Magnetic Properties of Zigzag Spin Chains

CuO

Crystal Growth of Spin Chain Compound Sr2CuO3 Doped with Quantum Defects: Zn, Co, Ni, and Mn

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Effect of magnetic and non-magnetic impurities on the spin dimers in the spin 1/2 chains of quantum magnet Sr

, Sr

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Cu

Cu