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HfMnSb 2 : A Metal‐Ordered NiAs‐type Pnictide with a Conical Spin Order
Author(s) -
Murakami Taito,
Yamamoto Takafumi,
Tassel Cédric,
Takatsu Hiroshi,
Ritter Clemens,
Ajiro Yoshitami,
Kageyama Hiroshi
Publication year - 2016
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201602066
Subject(s) - condensed matter physics , pnictogen , metal , type (biology) , spin (aerodynamics) , conical surface , order (exchange) , magnetic moment , materials science , magnet , chemistry , crystallography , physics , superconductivity , quantum mechanics , geology , finance , economics , metallurgy , composite material , thermodynamics , paleontology
The NiAs‐type structure is one of the most common structures in solids, but metal order has been almost exclusively limited to chalcogenides. The synthesis of HfMnSb 2 is reported with a novel metal‐ordered NiAs‐type structure. HfMnSb 2 undergoes a conical spin order below 270 K, in marked contrast to conventional magnetic order observed in NiAs‐type pnictides. We argue that the layered arrangement of Hf and Mn makes it a quasi 2D magnet, where the Mn layers with localized magnetic moments (Mn 2+ ; S =5/2) can interact only through RKKY interactions, instead of metal–metal bonding that is otherwise dominant for typical NiAs‐type pnictides. This result suggests that controlling order–disorder in NiAs‐type pnictides enables a study of 2D‐to‐3D crossover behavior in itinerant magnetic system.