Issue |
EPL
Volume 146, Number 1, April 2024
|
|
---|---|---|
Article Number | 16001 | |
Number of page(s) | 7 | |
Section | Condensed matter and materials physics | |
DOI | https://doi.org/10.1209/0295-5075/ad2d87 | |
Published online | 26 March 2024 |
Critical behavior in the
ferromagnet
1 Department of Physics, Renmin University of China - Beijing 100872, PRC
2 Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices, Renmin University of China Beijing 100872, PRC
3 Key Laboratory of Quantum State Construction and Manipulation (Ministry of Education), Renmin University of China - Beijing 100872, PRC
4 Laboratory for Neutron Scattering, Renmin University of China - Beijing 100872, PRC
Received: 27 November 2023
Accepted: 27 February 2024
High-Curie-temperature ferromagnets are promising candidates for designing new spintronic devices. Here we have successfully synthesized the single crystal of the itinerant ferromagnet Mn5Ge3 using flux method. Its critical properties were investigated by means of bulk dc magnetization at the boundary of the paramagnetic (PM) and ferromagnetic (FM) phase to determine intrinsic magnetic interactions. Critical exponents with a critical temperature
K and
with
K are acquired by the modified Arrott plot, whereas
is deduced by a critical isotherm analysis at
K. The self-consistency and reliability of these critical exponents are verified by the Widom scaling law and the scaling equations. Further analysis reveals that the spin interaction in Mn5Ge3 exhibits three-dimensional Ising-like behavior. The magnetic exchange interaction is found to decay as
, meaning that the spin interactions exceed the nearest neighbors, which may be related to the different Mn-Mn interactions with inequal exchange strengths.
© 2024 EPLA
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