Zobrazeno 1 - 10
of 200
pro vyhledávání: '"Křižan, J."'
Autor:
Teknowijoyo, S., Cho, K., Timmons, E. I., Tanatar, M. A., Krizan, J. W., Cava, R. J., Prozorov, R.
Publikováno v:
Journal of Physics: Condensed Matter 33, 455802 (2021)
Radio-frequency (14.6 MHz) AC magnetic susceptibility, $\chi^{\prime}_{AC}$, of \dytio\ was measured using a self-oscillating tunnel-diode resonator. Measurements were made with the excitation AC field parallel to the superimposed DC magnetic field u
Externí odkaz:
http://arxiv.org/abs/2105.12218
Autor:
Morris, C. M., Desai, Nisheeta, Viirok, J., Huvonen, D., Nagel, U., Room, T., Krizan, J. W., Cava, R. J., McQueen, T. M., Koohpayeh, S. M., Kaul, Ribhu K., Armitage, N. P.
Publikováno v:
Nature Physics (2021)
The Ising chain in transverse field is a paradigmatic model for a host of physical phenomena, including spontaneous symmetry breaking, topological defects, quantum criticality, and duality. Although the quasi-1D ferromagnet CoNb$_2$O$_6$ has been put
Externí odkaz:
http://arxiv.org/abs/2009.14189
Publikováno v:
Phys. Rev. B 101, 214425 (2020)
Cobalt pyrochlore fluoride NaCaCo$_2$F$_7$ is a disordered frustrated magnet composed of Co$^{2+}$ ions with an effective spin-$\frac{1}{2}$ magnetic moment and exhibits spin freezing below $T_f \sim$2.4 K. We perform ultrasound velocity measurements
Externí odkaz:
http://arxiv.org/abs/2002.07980
Autor:
Zeisner, J., Bräuninger, S. A., Opherden, L., Sarkar, R., Gorbunov, D. I., Krizan, J. W., Herrmannsdörfer, T., Cava, R. J., Wosnitza, J., Büchner, B., Klauss, H. -H., Kataev, V.
Publikováno v:
Phys. Rev. B 99, 155104 (2019)
We report high-frequency/high-field electron spin resonance (ESR) and high-field magnetization studies on single crystals of the bond-disordered pyrochlore NaCaCo$_2$F$_7$. Frequency- and temperature-dependent ESR investigations above the freezing te
Externí odkaz:
http://arxiv.org/abs/1810.06399
Autor:
Scheie, A., Sanders, M., Krizan, J., Christianson, A. D., Garlea, V. O., Cava, R. J., Broholm, C.
Publikováno v:
Phys. Rev. B 98, 134401 (2018)
We report the crystal field levels of several newly-discovered rare-earth kagome compounds: $\rm{Nd_3Sb_3Mg_2O_{14}}$, $\rm{Nd_3Sb_3Zn_2O_{14}}$, and $\rm{Pr_3Sb_3Mg_2O_{14}}$. We determine the CEF Hamiltonian by fitting to neutron scattering data us
Externí odkaz:
http://arxiv.org/abs/1808.05111
Autor:
Cai, Y., Wilson, M. N., Hallas, A. M., Liu, L., Frandsen, B. A., Dunsiger, S. R., Krizan, J. W., Cava, R. J., Uemura, Y. J., Rubel, O., Luke, G. M.
A new pyrochlore compound, NaCaNi$_2$F$_7$, was recently synthesized and has a single magnetic site with spin-1 Ni$^{2+}$. We present zero field (ZF) and longitudinal field (LF) muon spin rotation ($\mu$SR) measurements on this pyrochlore. Density fu
Externí odkaz:
http://arxiv.org/abs/1806.10970
Autor:
Ross, K. A., Brown, J. M., Cava, R. J., Krizan, J. W., Nagler, S. E., Rodriguez-Rivera, J. A., Stone, M. B.
The antiferromagnetic pyrochlore material NaCaCo$_2$F$_7$ is a thermal spin liquid over a broad temperature range (~ 140 K down to $T_F = 2.4 $K), in which magnetic correlations between Co$^{2+}$ dipole moments explore a continuous manifold of antife
Externí odkaz:
http://arxiv.org/abs/1703.07468
The crystal structures and magnetic properties of three previously unreported A2B2F7 pyrochlore materials, NaSrMn2F7, NaCaFe2F7, and NaSrFe2F7 are presented. In these compounds, either S=2 Fe2+ or S=5/2 Mn2+ is on the B site, while nonmagnetic Na and
Externí odkaz:
http://arxiv.org/abs/1608.02907
Autor:
Jenkins, G. S., Lane, C., Barbiellini, B., Sushkov, A. B., Carey, R. L., Liu, Fengguang, Krizan, J. W., Kushwaha, S. K., Gibson, Q., Chang, Tay-Rong, Jeng, Horng-Tay, Lin, Hsin, Cava, R. J., Bansil, A., Drew, H. D.
Publikováno v:
Physical Review B 94, 085121 (2016)
Optical measurements and band structure calculations are reported on 3D Dirac materials. The electronic properties associated with the Dirac cone are identified in the reflectivity spectra of Cd$_3$As$_2$ and Na$_3$Bi single crystals. In Na$_3$Bi, th
Externí odkaz:
http://arxiv.org/abs/1605.02145
Publikováno v:
Phys. Rev. B 93, 180407 (2016)
We introduce $\mathrm{Nd_{3}Sb_{3}Mg_{2}O_{14}}$ with ideal kagome lattices of neodymium ions in ABC stacking. Thermodynamic measurements show a Curie-Weiss temperature of $\Theta_{CW}=-0.12~$K, a Nd$^{3+}$ spin-1/2 Kramers doublet ground state, and
Externí odkaz:
http://arxiv.org/abs/1604.03950