Critical behavior in the half-metallic Heusler alloy Co2TiSn
Critical behavior in the half-metallic Heusler alloy Co2TiSn
复制标题
半金属 Heusler 合金 Co2TiSn 的临界行为
DOI：
10.1103/physrevb.100.214419
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发表时间：
2019-12
影响因子：
3.7
通讯作者：
Zengming Zhang
中科院分区：
文献类型：
--
作者：
Azizur Rahman;Majeed ur Rehman;Dechen Zhang;Min Zhang;Xiangqi Wang;Rucheng Dai;Zhongping Wang;Xiaoping Tao;Lei Zhang;Zengming Zhang
The critical behavior of Heusler alloy $\mathrm{Co}{}_{2}\mathrm{TiSn}$ is investigated by bulk magnetization study around the paramagnetic to ferromagnetic transition. The precise value of Curie temperature ($T{}_{c}=358\phantom{\rule{4pt}{0ex}}\mathrm{K}$) as well as the critical exponents ($\ensuremath{\beta}=0.527\ifmmode\pm\else\textpm\fi{}0.003, \ensuremath{\gamma}=1.229\ifmmode\pm\else\textpm\fi{}0.002$, and $\ensuremath{\delta}=3.33\ifmmode\pm\else\textpm\fi{}0.002$) were determined by means of different analytical methods such as modified Arrott plot analysis, the Kouvel-Fisher method, and critical isotherm analysis. With these critical exponents the isotherm $M(H)$ curves below and above $T{}_{c}$ collapse into two universal branches, fulfilling the single scaling equation $m={f}_{\ifmmode\pm\else\textpm\fi{}}h$, where $m$ and $h$ are normalized magnetization and field, respectively. The reliability of the critical exponents were confirmed by Widom scaling hypothesis $\ensuremath{\delta}=\ensuremath{\gamma}{\ensuremath{\beta}}^{\ensuremath{-}1}$. Apart from the slight increase in $\ensuremath{\beta}$ and $\ensuremath{\gamma}$, the deduced critical exponents were consistent with the theoretical prediction of the mean-field model, indicating the long range magnetic interaction in $\mathrm{Co}{}_{2}\mathrm{TiSn}$. Additionally, it is obtained that spin interaction decays as $J(r)\ensuremath{\sim}{r}^{\ensuremath{-}4.7}$. We suggest that the competition between localized majority spins and itinerant minority spins magnetic interaction could be responsible for critical behavior in $\mathrm{Co}{}_{2}\mathrm{TiSn}$.
The critical behavior of Heusler alloy $\mathrm{Co}{}_{2}\mathrm{TiSn}$ is investigated by bulk magnetization study around the paramagnetic to ferromagnetic transition. The precise value of Curie temperature ($T{}_{c}=358\phantom{\rule{4pt}{0ex}}\mathrm{K}$) as well as the critical exponents ($\ensuremath{\beta}=0.527\ifmmode\pm\else\textpm\fi{}0.003, \ensuremath{\gamma}=1.229\ifmmode\pm\else\textpm\fi{}0.002$, and $\ensuremath{\delta}=3.33\ifmmode\pm\else\textpm\fi{}0.002$) were determined by means of different analytical methods such as modified Arrott plot analysis, the Kouvel-Fisher method, and critical isotherm analysis. With these critical exponents the isotherm $M(H)$ curves below and above $T{}_{c}$ collapse into two universal branches, fulfilling the single scaling equation $m={f}_{\ifmmode\pm\else\textpm\fi{}}h$, where $m$ and $h$ are normalized magnetization and field, respectively. The reliability of the critical exponents were confirmed by Widom scaling hypothesis $\ensuremath{\delta}=\ensuremath{\gamma}{\ensuremath{\beta}}^{\ensuremath{-}1}$. Apart from the slight increase in $\ensuremath{\beta}$ and $\ensuremath{\gamma}$, the deduced critical exponents were consistent with the theoretical prediction of the mean-field model, indicating the long range magnetic interaction in $\mathrm{Co}{}_{2}\mathrm{TiSn}$. Additionally, it is obtained that spin interaction decays as $J(r)\ensuremath{\sim}{r}^{\ensuremath{-}4.7}$. We suggest that the competition between localized majority spins and itinerant minority spins magnetic interaction could be responsible for critical behavior in $\mathrm{Co}{}_{2}\mathrm{TiSn}$.
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影响因子：
3.7
作者：
S. Majumdar;M. Chattopadhyay;V. Sharma;K. S. Sokhey;S. Roy;P. Chaddah
通讯作者：
S. Majumdar;M. Chattopadhyay;V. Sharma;K. S. Sokhey;S. Roy;P. Chaddah
DOI：
10.1103/physrevb.51.12585
发表时间：
1995-05
期刊：
Physical review. B, Condensed matter
影响因子：
--
作者：
Seeger;Kaul;Kronmüller;Reisser
通讯作者：
Seeger;Kaul;Kronmüller;Reisser
影响因子：
3.2
作者：
S. Gardelis;J. Androulakis;P. Migiakis;J. Giapintzakis;S. Clowes;Y. Bugoslavsky;W. Branford;Y. Miyoshi;L. Cohen
通讯作者：
S. Gardelis;J. Androulakis;P. Migiakis;J. Giapintzakis;S. Clowes;Y. Bugoslavsky;W. Branford;Y. Miyoshi;L. Cohen
影响因子：
16.6
作者：
Jourdan, M.;Minar, J.;Braun, J.;Kronenberg, A.;Chadov, S.;Balke, B.;Gloskovskii, A.;Kolbe, M.;Elmers, H. J.;Schoenhense, G.;Ebert, H.;Felser, C.;Klaeui, M.
通讯作者：
Klaeui, M.
影响因子：
2.7
作者：
Bhargab Deka;R. Das;A. Srinivasan
通讯作者：
Bhargab Deka;R. Das;A. Srinivasan