Zobrazeno 1 - 10
of 64
pro vyhledávání: '"Gardner, J."'
Many of the most exciting materials discoveries in fundamental condensed matter physics are made in systems hosting some degree of intrinsic disorder. While disorder has historically been regarded as something to be avoided in materials design, it is
Externí odkaz:
http://arxiv.org/abs/2402.18379
Double perovskite iridates $A_2$ZnIrO$_6$ ($A$ = alkaline or lanthanide) show complex magnetic behaviors ranging from weak ferromagnetism to successive antiferromagnetic transitions. Here we report the static ($dc$) and dynamic ($ac$) magnetic suscep
Externí odkaz:
http://arxiv.org/abs/2102.01276
Autor:
Ramon, J. G. A., Wang, C. W., Ishida, L., Bernardo, P. L., Leite, M. M., Vichi, F. M., Gardner, J. S., Freitas, R. S.
Publikováno v:
Phys. Rev. B 99, 214442 (2019)
Neutron scattering, a.c. magnetic susceptibility and specific heat studies have been carried out on polycrystalline Dy2Zr2O7. Unlike the pyrochlore spin ice Dy2Ti2O7, Dy2Zr2O7 crystallizes into the fluorite structure and the magnetic Dy3+ moments ran
Externí odkaz:
http://arxiv.org/abs/1906.10738
Autor:
Sarte, P. M., Aczel, A. A., Ehlers, G., Stock, C., Gaulin, B. D., Mauws, C., Stone, M. B., Calder, S., Nagler, S. E., Hollett, J. W., Zhou, H. D., Gardner, J. S., Attfield, J. P., Wiebe, C. R.
Publikováno v:
2017 J. Phys.: Condens. Matter 29 45LT01
Magnetic monopoles are hypothesised elementary particles connected by Dirac strings that behave like infinitely thin solenoids. Despite decades of searches, free magnetic monopoles and their Dirac strings have eluded experimental detection, although
Externí odkaz:
http://arxiv.org/abs/1710.10337
Autor:
Ma, Zhen, Wang, Jinghui, Dong, Zhao-Yang, Zhang, Jun, Li, Shichao, Zheng, Shu-Han, Yu, Yunjie, Wang, Wei, Che, Liqiang, Ran, Kejing, Bao, Song, Cai, Zhengwei, Čermák, P., Schneidewind, A., Yano, S., Gardner, J. S., Lu, Xin, Yu, Shun-Li, Liu, Jun-Ming, Li, Shiyan, Li, Jian-Xin, Wen, Jinsheng
Publikováno v:
Phys. Rev. Lett. 120, 087201 (2018)
We report on comprehensive results identifying the ground state of a triangular-lattice structured YbZnGaO$_4$ to be spin glass, including no long-range magnetic order, prominent broad excitation continua, and absence of magnetic thermal conductivity
Externí odkaz:
http://arxiv.org/abs/1709.00256
Autor:
Ling, C. D., Allison, M. C., Schmid, S., Adveev, M., Gardner, J. S., Wang, C. -W., Ryan, D. H., Zbiri, M., Soehnel, T.
Publikováno v:
Phys. Rev. B 96, 180410 (2017)
We have experimentally identified a new magnetic ground state for the kagome lattice, in the perfectly hexagonal Fe2+ (3d6, S = 2) compound Fe4Si2Sn7O16. Representational symmetry analysis of neutron diffraction data shows that below T_N = 3.5 K, the
Externí odkaz:
http://arxiv.org/abs/1703.08637
Autor:
Rule, K. C., Willenberg, B., Schäpers, M., Wolter, A. U. B., Büchner, B., Drechsler, S. -L., Ehlers, G., Tennant, D. A., Mole, R. A., Gardner, J. S., Süllow, S., Nishimoto, S.
Publikováno v:
Phys. Rev. B 95, 024430 (2017)
Here we present inelastic neutron scattering measurements from the frustrated, quantum spin-1/2 chain material linarite, PbCuSO_4(OH)_2. Time of flight data, taken at 0.5K and zero applied magnetic field reveals low-energy dispersive spin wave excita
Externí odkaz:
http://arxiv.org/abs/1611.00986
Autor:
Hallas, A. M., Paddison, J. A. M., Silverstein, H. J., Goodwin, A. L., Stewart, J. R., Wildes, A. R., Cheng, J. G., Zhou, J. S., Goodenough, J. B., Choi, E. S., Ehlers, G., Gardner, J. S., Wiebe, C. R., Zhou, H. D.
Publikováno v:
Phys. Rev. B 86, 134431 (2012)
The pyrochlore Ho2Ge2O7 is a new highly correlated spin ice material. Physical property measurements including x-ray diffraction, dc susceptibility and ac susceptibility, confirm that it shares the distinctive characteristics of other known spin ices
Externí odkaz:
http://arxiv.org/abs/1603.06319
Autor:
Ueland, B. G., Miclea, C. F., Gofryk, K., Qiu, Y., Ronning, F., Movshovich, R., Bauer, E. D., Gardner, J. S., Thompson, J. D.
Publikováno v:
Physical Review B 90, 121109(R) (2014)
We present experimental results for the heavy-electron compound CeCu$_{4}$Ga which show that it possesses short-range magnetic correlations down to a temperature of $T = 0.1$ K. Our neutron scattering data show no evidence of long-range magnetic orde
Externí odkaz:
http://arxiv.org/abs/1408.6576
Autor:
Silverstein, H. J., Fritsch, K., Flicker, F., Hallas, A. M., Gardner, J. S., Qiu, Y., Ehlers, G., Savici, A. T., Yamani, Z., Ross, K. A., Gaulin, B. D., Gingras, M. J. P., Paddison, J. A. M., Foyevtsova, K., Valenti, R., Hawthorne, F., Wiebe, C. R., Zhou, H. D.
Publikováno v:
H. J. Silverstein et al. (2014) Phys. Rev. B 89, 054433
The spin glass behavior of Y2Mo2O7 has puzzled physicists for nearly three decades. Free of bulk disorder within the resolution of powder diffraction methods, it is thought that this material is a rare realization of a spin glass resulting from weak
Externí odkaz:
http://arxiv.org/abs/1305.1274