Zobrazeno 1 - 10
of 123
pro vyhledávání: '"Sangeetha, N. S."'
Autor:
Ning, Zhenhua, Das, Pinaki, Lee, Y., Sangeetha, N. S., Abernathy, D. L., Johnston, D. C., McQueeney, R. J., Vaknin, D., Ke, Liqin
SrCr$_2$As$_2$ is an itinerant antiferromagnet in the same structural family as the SrFe2As2 high-temperature superconductors. We report our calculations of exchange coupling parameters $J_{ij}$ for SrCr$_2$As$_2$ using a static linear-response metho
Externí odkaz:
http://arxiv.org/abs/2408.05583
Autor:
Han, Tianxiong, Pakhira, Santanu, Sangeetha, N. S., Riberolles, S. X. M., Heitmann, T. W., Wu, Yan, Johnston, D. C., McQueeney, R. J., Ueland, B. G.
Publikováno v:
Phys. Rev. B 109, 174428 (2024)
We report neutron diffraction results for the body-centered-tetragonal series Eu(Co$_{1-x}$Ni$_x$)$_{2-y}$As$_2$, $x=0.10$, $0.20$, $0.42$, and $0.82$, $y\leq0.10$, that detail changes to the magnetic ordering with nominal hole doping. We report the
Externí odkaz:
http://arxiv.org/abs/2402.06773
Autor:
Islam, Farhan, Trevisan, Thaís V., Heitmann, Thomas, Pakhira, Santanu, Riberolles, Simon X. M., Sangeetha, N. S., Johnston, David C., Orth, Peter P., Vaknin, David
Publikováno v:
Phys. Rev. B 107, 054425 (2023); 14 pages
We report neutron-diffraction results on single-crystal CaMn$_2$P$_2$ containing corrugated Mn honeycomb layers and determine its ground-state magnetic structure. The diffraction patterns consist of prominent (1/6, 1/6, $L$) reciprocal lattice unit (
Externí odkaz:
http://arxiv.org/abs/2205.04492
Autor:
Ding, Q. -P., Pakhira, Santanu, Sangeetha, N. S., Krenkel, E. H., Timmons, E. I., Tanatar, M. A., Prozorov, R., Johnston, D. C., Furukawa, Y.
Publikováno v:
Phys. Rev. B 105, 134408 (2022)
The physical properties of itinerant antiferromagnetic (AFM) SrCr$_2$As$_2$ with body-centered tetragonal ThCr$_2$Si$_2$ structure were investigated in single crystalline and polycrystalline forms by electrical resistivity $\rho$, heat capacity $C_{\
Externí odkaz:
http://arxiv.org/abs/2203.14337
Publikováno v:
Phys. Rev. B 104, 224413 (2021)
We carried out $^{75}$As nuclear magnetic resonance (NMR) measurements on the trigonal CaMn$_2$As$_2$ and SrMn$_2$As$_2$ insulators exhibiting antiferromagnetic (AFM) ordered states below N\'eel temperatures $T_{\rm N}$ = 62 K and 120 K, respectively
Externí odkaz:
http://arxiv.org/abs/2112.00836
Autor:
Sangeetha, N. S., Pakhira, Santanu, Ding, Q. -P., Lee, H. -C., Smetana, V., Mudring, A. -V., Furukawa, Y., Johnston, D. C.
Publikováno v:
Proc. Nat. Acad. Sci. USA 118, e2108724118 (2021)
Single crystals of SrMn2P2 and CaMn2P2 were grown using Sn flux and characterized by single-crystal x-ray diffraction, electrical resistivity rho, heat capacity Cp, and magnetic susceptibility chi = M/H measurements versus temperature T and magnetiza
Externí odkaz:
http://arxiv.org/abs/2105.02394
Autor:
Ueland, B. G., Pakhira, Santanu, Li, Bing, Sapkota, A., Sangeetha, N. S., Perring, T. G., Lee, Y., Ke, Liqin, Johnston, D. C., McQueeney, R. J.
Publikováno v:
Phys. Rev. B 104, L220410 (2021)
CaCo$_{2-y}$As$_2$ is an unusual itinerant magnet with signatures of extreme magnetic frustration. The conditions for establishing magnetic order in such itinerant frustrated magnets, either by reducing frustration or increasing electronic correlatio
Externí odkaz:
http://arxiv.org/abs/2103.05695
Autor:
Ding, Q. -P., Sangeetha, N. S., Meier, W. R., Xu, M., Bud'ko, S. L., Canfield, P. C., Johnston, D. C., Furukawa, Y.
Publikováno v:
Phys. Rev. B 102, 180406(R) (2020)
In the nematic state of iron-based superconductors, twin formation often obscures the intrinsic, anisotropic, in-plane physical properties.Relatively high in-plane external magnetic fields $H_{\rm ext}$ greater than the typical lab-scale magnetic fie
Externí odkaz:
http://arxiv.org/abs/2011.01145
The ternary-arsenide compound BaCo2As2 was previously proposed to be in proximity to a quantum-critical point where long-range ferromagnetic (FM) order is suppressed by quantum fluctuations. Here we report the effect of Ir substitution for Co on the
Externí odkaz:
http://arxiv.org/abs/2007.00097
Autor:
Sangeetha, N. S., Pakhira, Santanu, Ryan, D. H., Smetana, V., Mudring, A. -V., Johnston, D. C.
Publikováno v:
Phys. Rev. Materials 4, 084407 (2020)
The effects of Ni doping in Eu(Co{1-x}Ni{x})2As2 single crystals with x =0 to 1 grown out of self flux are investigated via crystallographic, electronic transport, magnetic, and thermal measurements. All compositions adopt the body-centered-tetragona
Externí odkaz:
http://arxiv.org/abs/2005.07614