Zobrazeno 1 - 10
of 140
pro vyhledávání: '"Prozorova L"'
The Goldstone theorem mandates that a spontaneous symmetry breaking entails the emergence of gap(mass)less excitations. In the case where a rotational invariance of a system of spin magnetic moments is broken by an antiferromagnetic order, these are
Externí odkaz:
http://arxiv.org/abs/1603.05869
Autor:
Prozorova, L. A., Sosin, S. S., Svistov, L. E., Buettgen, N., Kemper, J. B., Reyes, A. P., Riggs, S., Petrenko, O. A., Prokofiev, A.
We report on a heat capacity study of high quality single crystal samples of \lcvo\ -- a frustrated spin $S=1/2$ chain system -- in magnetic field amounting to 3/4 of the saturation field. At low fields up to about 7~T, a linear temperature dependenc
Externí odkaz:
http://arxiv.org/abs/1501.03226
Autor:
Vasiliev, A. M., Prozorova, L. A., Svistov, L. E., Tsurkan, V., Dziom, V., Shuvaev, A., Pimenov, Anna, Pimenov, A.
Publikováno v:
Phys. Rev. B, 88, 144403 (2013)
Using electron-spin-resonance (ESR) technique we investigate the magnetic structure of CuCrO2, quasi-two-dimensional antiferromagnet with weakly distorted triangular lattice. Resonance frequencies and the excitation conditions in CuCrO2 at low temper
Externí odkaz:
http://arxiv.org/abs/1307.0955
Autor:
Bush, A. A., Büttgen, N., Gippius, A. A., Glazkov, V. N., Kraetschmer, W., Prozorova, L. A., Svistov, L. E., Vasiliev, A. M., Zheludev, A., Farutin, A. M.
Publikováno v:
Phys. Rev. B, 88, 104411 (2013)
We present the results of magnetization, ESR and NMR measurements on single crystal samples of the frustrated S=1/2 chain cuprate LiCu2O2 doped with nonmagnetic Zn^2+. As shown by the x-ray techniques the crystals of Li(Cu{1-x}Zn{x})2O2 with x<0.12 a
Externí odkaz:
http://arxiv.org/abs/1304.4728
Autor:
Bush, A. A., Glazkov, V. N., Hagiwara, M., Kashiwagi, T., Kimura, S., Omura, K., Prozorova, L. A., Svistov, L. E., Vasiliev, A. M., Zheludev, A.
Publikováno v:
Phys.Rev.B, Vol.85, No.5, 054421 (2012)
We present the results of the magnetization and dielectric constant measurements on untwinned single crystal samples of the frustrated S=1/2 chain cuprate LiCu_2O_2. Novel magnetic phase transitions were observed. A spin flop transition of the spiral
Externí odkaz:
http://arxiv.org/abs/1112.4971
Publikováno v:
Low Temp. Phys. v. 36, p. 736 (2010)
Spin wave resonances with enormously large wave numbers corresponding to wave vectors 10^5-10^6 cm^{-1} are observed in thin plates of FeBO3. The study of spin wave resonances allows one to obtain information about the spin wave spectrum. The tempera
Externí odkaz:
http://arxiv.org/abs/1006.5192
Publikováno v:
Phys. Rev. B 82, 094428 (2010)
The XY-pyrochlore antiferromagnet \ETO\ is studied by heat capacity measurements and electron spin resonance spectroscopy performed on single crystal samples. The magnetic phase diagrams are established for two directions of applied field, $H\paralle
Externí odkaz:
http://arxiv.org/abs/1006.2238
Publikováno v:
Phys. Rev. B Vol. 81, 052403 (2010)
We report on NMR studies of the quasi--1D antiferromagnetic $S=1/2$ chain cuprate LiCuVO$_4$, focusing on the high--field spin--modulated phase observed recently in applied magnetic fields $H > H_{\rm c2}$ ($\mu_0H_{\rm c2} \approx 7.5$ T). The NMR s
Externí odkaz:
http://arxiv.org/abs/0912.4376
Publikováno v:
Phys. Rev. B 79, 014419 (2009)
The spin dynamics in the geometrically frustrated pyrochlore antiferromagnet $\rm Gd_2Sn_2O_7$ is studied by means of the electron spin resonance. In the ordered phase ($T_N = 1$ K), we have detected three gapped resonance modes. Their values agree w
Externí odkaz:
http://arxiv.org/abs/0809.0798
Autor:
Smirnov, A. I., Svistov, L. E., Prozorova, L. A., Zheludev, A., Lumsden, M. D., Ressouche, E., Petrenko, O. A., Nishikawa, K., Kimura, S., Hagiwara, M., Kindo, K., Shapiro, A. Ya., Demianets, L. N.
Publikováno v:
Phys. Rev. Lett. 102, 037202 (2009)
The entire magnetic phase diagram of the quasi two dimensional (2D) magnet on a distorted triangular lattice KFe(MoO4)2 is outlined by means of magnetization, specific heat, and neutron diffraction measurements. It is found that the spin network brea
Externí odkaz:
http://arxiv.org/abs/0807.2804