Critical behavior of the single-crystal helimagnet MnSi
Critical behavior of the single-crystal helimagnet MnSi
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单晶螺旋磁体 MnSi 的临界行为
DOI:
10.1103/physrevb.91.024403
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发表时间:
2015-01
影响因子:
3.7
通讯作者:
Zhang Yuheng
中科院分区:
文献类型:
--
作者:
Zhang Lei;Menzel Dirk;Jin Chiming;Du Haifeng;Ge Min;Zhang Changjin;Pi Li;Tian Mingliang;Zhang Yuheng
The critical behavior of the single-crystal helimagnet MnSi is investigated by means of bulk dc magnetization at the boundary between the conical state and paramagnetic phase. We obtain the critical exponents $(\ensuremath{\beta}=0.242\ifmmode\pm\else\textpm\fi{}0.006,\ensuremath{\gamma}=0.915\ifmmode\pm\else\textpm\fi{}0.003$, and $\ensuremath{\delta}=4.734\ifmmode\pm\else\textpm\fi{}0.006)$, where the self-consistency and reliability are verified by the Widom scaling law and the scaling equation. The critical exponents of MnSi belong to the universality class of tricritical mean-field theory, which unambiguously indicates a tricritical phenomenon at the boundary between the first-order phase transition and the second-order one induced by the external magnetic field. The tricritical point (TCP) is determined as ${H}_{\mathrm{TCP}}\ensuremath{\approx}3200$ Oe at the critical temperature, consistent with the previous report [A. Bauer, M. Garst, and C. Pfleiderer, Phys. Rev. Lett. 110, 177207 (2013)]. The critical behavior suggests a long-range magnetic coupling with the exchange distance decaying as $J(r)\ensuremath{\approx}{r}^{\ensuremath{-}4.3}$ in MnSi.
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DOI:
10.1088/0953-8984/24/29/294204
发表时间:
2012-03
期刊:
Journal of Physics: Condensed Matter
影响因子:
--
作者:
H. Wilhelm;M. Baenitz;M. Schmidt;C. Naylor;R. Lortz;U. Rößler;A. A. Leonov-A.;A. Bogdanov
通讯作者:
H. Wilhelm;M. Baenitz;M. Schmidt;C. Naylor;R. Lortz;U. Rößler;A. A. Leonov-A.;A. Bogdanov
影响因子:
8.6
作者:
Pappas, C.;Lelievre-Berna, E.;Farago, B.
通讯作者:
Farago, B.
影响因子:
3.7
作者:
J. Kindervater;W. Haussler;M. Janoschek;C. Pfleiderer;P. Boni;M. Garst
通讯作者:
J. Kindervater;W. Haussler;M. Janoschek;C. Pfleiderer;P. Boni;M. Garst
影响因子:
3.7
作者:
Buhrandt, Stefan;Fritz, Lars
通讯作者:
Fritz, Lars
影响因子:
1.1
作者:
A. E. Petrova;V. N. Krasnorusskiĭ;J. Sarrao;S. Stishov
通讯作者:
A. E. Petrova;V. N. Krasnorusskiĭ;J. Sarrao;S. Stishov