Open AccessLarge Anomalous Hall and Nernst Effects in High Curie‐Temperature Iron‐Based Heusler Compounds
Author(s) -
Mende Felix,
Noky Jonathan,
Guin Satya N.,
Fecher Gerhard H.,
Manna Kaustuv,
Adler Peter,
Schnelle Walter,
Sun Yan,
Fu Chenguang,
Felser Claudia
Publication year - 2021
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.202100782
Subject(s) - nernst effect , nernst equation , condensed matter physics , berry connection and curvature , hall effect , curie temperature , seebeck coefficient , thermoelectric effect , ferromagnetism , materials science , physics , magnetic field , thermodynamics , quantum mechanics , electrode , geometric phase
The interplay between topology and magnetism has recently sparked the frontier studies of magnetic topological materials that exhibit intriguing anomalous Hall and Nernst effects owning to the large intrinsic Berry curvature (BC). To better understand the anomalous quantum transport properties of these materials and their implications for future applications such as electronic and thermoelectric devices, it is crucial to discover more novel material platforms for performing anomalous transverse transport studies. Here, it is experimentally demonstrated that low‐cost Fe‐based Heusler compounds exhibit large anomalous Hall and Nernst effects. An anomalous Hall conductivity of 250–750 S cm −1 and Nernst thermopower of above 2 µV K −1 are observed near room temperature. The positive effect of anti‐site disorder on the anomalous Hall transport is revealed. Considering the very high Curie temperature (nearly 1000 K), larger Nernst thermopowers at high temperatures are expected owing to the existing magnetic order and the intrinsic BC. This work provides a background for developing low‐cost Fe‐based Heusler compounds as a new material platform for anomalous transport studies and applications, in particular, near and above room temperature.