Zobrazeno 1 - 10
of 237
pro vyhledávání: '"Chatterji, Tapan"'
Autor:
Kimber, Simon A. J., Zhang, Jiayong, Liang, Charles H., Guzman-Verri, Gian G., Littlewood, Peter B., Cheng, Yongqiang, Abernathy, Douglas L., Hudspeth, Jessica M., Luo, Zhong-Zhen, Kanatzidis, Mercouri G., Chatterji, Tapan, Ramirez-Cuesta, Anibal J., Billinge, Simon J. L.
Publikováno v:
Nature Materials, 22, 311-315 (2023)
Cubic energy materials such as thermoelectrics or hybrid perovskite materials are often understood to be highly disordered. In GeTe and related IV-VI compounds, this is thought to provide the low thermal conductivities needed for thermoelectric appli
Externí odkaz:
http://arxiv.org/abs/2202.05565
Publikováno v:
Scientific Reports, 8, 17637 (2018)
We study the spontaneous crystallization of an assembly of highly monodisperse steel spheres under shaking, as it evolves from localized icosahedral ordering towards a packing reaching crystalline ordering. Towards this end, real space neutron tomogr
Externí odkaz:
http://arxiv.org/abs/1812.01959
Autor:
Das, Ranjana R., Parida, Priyadarshini, Bera, A. K., Chatterji, Tapan, Nanda, B. R. K., Santhosh, P. N.
Exchange bias (EB) as large as ~5.5 kOe is observed in SrLaCo0.5Mn0.5O4 which is the highest ever found in any layered transition metal oxides including Ruddlesden-Popper series. Neutron diffraction measurement rules out long-range magnetic ordering
Externí odkaz:
http://arxiv.org/abs/1811.03960
We have investigated the ferromagnetic phase transition of elemental Co by high-resolution neutron backscattering spectroscopy. We monitored the splitting of the nuclear levels by the hyperfine field at the Co nucleus. The energy of this hyperfine sp
Externí odkaz:
http://arxiv.org/abs/1810.10906
Autor:
Das, Ranjana R., Neenu Lekshmi, P., Bera, A.K., Yusuf, S.M., Chatterji, Tapan, Santhosh, P.N.
Publikováno v:
In Journal of Alloys and Compounds 25 July 2022 910
Publikováno v:
Journal of Applied Physics 121, 073903 (2017)
Spin waves in the type-III ordered antiferromagnetic state of the frustrated $t$-$t'$ Hubbard model on the fcc lattice are calculated to investigate finite-$U$-induced competing interaction and frustration effects on magnetic excitations and instabil
Externí odkaz:
http://arxiv.org/abs/1608.07031
Autor:
Nair, Harikrishnan S., Chatterji, Tapan, Kumar, C. M. N., Hansen, T., Nhalil, Hariharan, Elizabeth, Suja, Strydom, A. M.
The magnetic structures and the magnetic phase transitions in the Mn-doped orthoferrite TbFeO$_3$ studied using neutron powder diffraction are reported. Magnetic phase transitions are identified at $T^\mathrm{Fe/Mn}_N \approx$ 295~K where a paramagne
Externí odkaz:
http://arxiv.org/abs/1602.00939
Autor:
Nair, Harikrishnan S., Fu, Zhendong, Kumar, C. M. N., Pomjakushin, V. Y., Xiao, Yinguo, Chatterji, Tapan, Strydom, André M.
Strong spin-lattice coupling and prominent frustration effects observed in the 50$\%$ Fe-doped frustrated hexagonal ($h$)LuMnO$_3$ are reported. A N\'{e}el transition at $T_{\mathrm N} \approx$ 112~K and a possible spin re-orientation transition at $
Externí odkaz:
http://arxiv.org/abs/1512.07539
The prototypical phase change material GeTe shows an enigmatic phase transition at Tc ca. 650 K from rhombohedral (R3m) to cubic (Fm-3m) symmetry. While local probes see little change in bonding, in contrast, average structure probes imply a displaci
Externí odkaz:
http://arxiv.org/abs/1506.08944
Autor:
Chatterji, Tapan, Santos, Antonio M. dos, Molaison, Jamie J., Hansen, Thomas C., Klotz, Stefan, Tucker, Mathew, Samanta, Kartik, Saha-Dasgupta, Tanusri
Publikováno v:
Phys. Rev. B 91, 104412 (2015)
We reinvestigate the pressure dependence of the crystal structure and antiferromagnetic phase transition in MnTe$_2$ by the rigorous and reliable tool of high pressure neutron powder diffraction. First-principles density functional theory calculation
Externí odkaz:
http://arxiv.org/abs/1502.07865