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Paramagnetic to ferromagnetic phase transition in lightly Fe-doped Cr2B

Author(s): Schoop, Leslie M; Hirschberger, Max; Tao, Jing; Felser, Claudia; Ong, Nai Phuan; et al

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Abstract: Cr2B displays temperature-independent paramagnetism. We induce ferromagnetism by replacing less than 3% of the Cr atoms by Fe. By the lowest Fe doping level made, Curie-Weiss behavior is observed; Theta(CW) changes from -20 K for 0.5% Fe-doped Cr2B to positive values of about 50 K by 5% Fe doping. The ferromagnetic T-C is 8 K for 2.5% Fe doping and increases linearly to 46 K by 5% doping; we infer that a quantum phase transition occurs near the 2.0% Fe level. Magnetic fluctuations at the intermediate doping levels are reflected in the linear resistance and an anomalous heat capacity at low temperatures. Imaging and chemical analysis down to the atomic scale show that the Fe dopant is randomly distributed.
Publication Date: 1-Jun-2014
Electronic Publication Date: 26-Jun-2014
Citation: Schoop, Leslie, Hirschberger, Max, Tao, Jing, Felser, Claudia, Ong, NP, Cava, RJ. (2014). Paramagnetic to ferromagnetic phase transition in lightly Fe-doped Cr2B. PHYSICAL REVIEW B, 89 (10.1103/PhysRevB.89.224417
DOI: doi:10.1103/PhysRevB.89.224417
ISSN: 2469-9950
EISSN: 2469-9969
Type of Material: Journal Article
Journal/Proceeding Title: PHYSICAL REVIEW B
Version: Final published version. This is an open access article.

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