Critical behavior in the antiperovskite ferromagnet AlCMn<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mn>3</mml:mn></mml:msub></mml:math>

Zhang, Lei; Wang, Bosen; Sun, Yan; Tong, P.; Fan, Jiyu; Zhang, Changjin; Pi, Li; Zhang, Yuheng

doi:10.1103/physrevb.85.104419

Cited by 69 publications

(48 citation statements)

References 31 publications

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“…The scaling hypothesis1 predicts that the scaled isothermals m = M |( T − T C )/ T C | − β vs. h = H |( T − T C )/ T C | −( β+γ ) fall onto two different curves, one for T > T C and the other for T < T C . As shown in Supplementary Figure S3 online, the scaling hypothesis is valid for the current samples, which further confirms that the obtained critical exponent values are reliable1037.…”

Section: Resultssupporting

confidence: 86%

Unusual ferromagnetic critical behavior owing to short-range antiferromagnetic correlations in antiperovskite Cu1-xNMn3+x (0.1 ≤ x ≤ 0.4)

Lin

Tong

Cui

et al. 2015

Sci Rep

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For ferromagnets, varying from simple metals to strongly correlated oxides,the critical behaviors near the Curie temperature (TC) can be grouped into several universal classes. In this paper, we report an unusual critical behavior in manganese nitrides Cu1-xNMn3+x (0.1 ≤ x ≤ 0.4). Although the critical behavior below TC can be well described by mean field (MF) theory, robust critical fluctuations beyond the expectations of any universal classes are observed above TC in x = 0.1. The critical fluctuations become weaker when x increases, and the MF-like critical behavior is finally restored at x = 0.4. In addition, the paramagnetic susceptibility of all the samples deviates from the Curie-Weiss (CW) law just above TC. This deviation is gradually smeared as x increases. The short-range antiferromagnetic ordering above TC revealed by our electron spin resonance measurement explains both the unusual critical behavior and the breakdown of the CW law.

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Section: Resultssupporting

confidence: 86%

Unusual ferromagnetic critical behavior owing to short-range antiferromagnetic correlations in antiperovskite Cu1-xNMn3+x (0.1 ≤ x ≤ 0.4)

Lin

Tong

Cui

et al. 2015

Sci Rep

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“…As can be seen in Fig. 5(a) and (b) for GaCMn 3 and GaC 0.8 Mn 3 , respectively, the scaling hypothesis is valid for both compounds, which further confirms that the obtained critical exponent values are unambiguously reliable [26,30].…”

Section: Resultssupporting

confidence: 85%

“…By analyzing the critical behavior, it can give an insight into the microscopic interactions responsible for the FM-PM transition [26][27][28][29]. Recently, we reported the critical behavior around T C for antiperovksite AlCMn 3 [30]. The obtained values of β, γ and δ are close to those expected by the mean-field (MF) model, indicative of a long-range FM interaction in AlCMn 3 .…”

Section: Introductionsupporting

confidence: 70%

“…The slight deviation of the critical exponents from the MF model towards the 3DH model suggests a competition between the two mechanisms for ferromagnetism in the GaCMn 3 [30]. For GaC 0.8 Mn 3 the critical exponent β (0.413) is closer to the value predicted by the 3DH model (0.365) than to the MF magnitude (0.5), indicating a stronger contribution to the ferromagnetism from the localized-electron scenario than from the itinerantelectron mechanism.…”

Section: Resultsmentioning

confidence: 93%

“…The obtained values of β, γ and δ are close to those expected by the mean-field (MF) model, indicative of a long-range FM interaction in AlCMn 3 . However, the obtained γ value is slightly larger than the MF value, suggesting the localized Mn-Mn interactions compete with the long-range interactions through Mn-C-Mn channels which are associated with the conduction electronic band [30]. A more recent study on CuNMn 3 suggests the critical behavior below and above T C behaves differently [31].…”

Section: Introductionmentioning

confidence: 75%

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