<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mtext>A</mml:mtext><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>27</mml:mn></mml:mrow></mml:mmultiscripts><mml:mtext>l</mml:mtext></mml:mrow></mml:math>NMR studies of itinerant electron ferromagnetic<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mtext>Ni</mml:mtext></mml:mrow><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mrow><mml:mtext>

Chen, Bin; Ohta, H.; Michioka, Chishiro; Itoh, Yutaka; Yoshimura, Kazuyoshi

doi:10.1103/physrevb.81.134416

Cited by 7 publications

(2 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Wilson ratio R W is about 2.4 and the dimensionless ratio that connects the low-temperature Seebeck coefficient with the Sommerfeld specific heat constant indicate that AlCNi 3 can be considered as a modest electron-correlated material. Consistently, the enhanced spin fluctuations were confirmed using 27 Al NMR measurement in AC x Ni 3 with x ≥ 0.1 where the FM order was suppressed and the system is in the vicinity of FM order [33,34]. On the contrary, an early experimental report shows AlCNi 3 is a weak ferromagnet with the FM-PM transition at 300 K [35].…”

Section: Research Progress On Ni-based Antiperovskite Compounds Othersupporting

confidence: 61%

Research Progress on Ni-Based Antiperovskite Compounds

Tong

Sun

2012

Advances in Condensed Matter Physics

View full text Add to dashboard Cite

The superconductivity in antiperovskite compound MgCNi3was discovered in 2001 following the discovery of the superconducting MgB2. In spite of its lower superconducting transition temperature (8 K) than MgB2(39 K), MgCNi3has attracted considerable attention due to its high content of magnetic element Ni and the cubic structure analogous to the perovskite cuprates. After years of extensive investigations both theoretically and experimentally, however, it is still not clear whether the mechanism for superconductivity is conventional or not. The central issue is if and how the ferromagnetic spin fluctuations contribute to the cooper paring. Recently, the experimental results on the single crystals firstly reported in 2007 trend to indicate a conventionals-wave mechanism. Meanwhile many compounds neighboring to MgCNi3were synthesized and the physical properties were investigated, which enriches the physics of the Ni-based antiperovskite compounds and help understand the superconductivity in MgCNi3. In this paper, we summarize the research progress in these two aspects. Moreover, a universal phase diagram of these compounds is presented, which suggests a phonon-mediated mechanism for the superconductivity, as well as a clue for searching new superconductors with the antiperovskite structure. Finally, a few possible scopes for future research are proposed.

show abstract

Section: Research Progress On Ni-based Antiperovskite Compounds Othersupporting

confidence: 61%

Research Progress on Ni-Based Antiperovskite Compounds

Tong

Sun

2012

Advances in Condensed Matter Physics

View full text Add to dashboard Cite

show abstract

“…27 K increases very fast as the temperature decreases and can be attributed mainly to transferred hyperfine fields from the Np 5f-electrons on the 27 Al nuclei. Therefore, the following equation can be considered [10,34]: …”

Section: Nmrmentioning

confidence: 99%

Ferromagnetic ordering in NpAl2: Magnetic susceptibility and Al nuclear magnetic resonance

Martel

Griveau

Eloirdi

et al. 2015

Journal of Magnetism and Magnetic Materials

View full text Add to dashboard Cite

a b s t r a c tWe report on the magnetic properties of the neptunium based ferromagnetic compound NpAl 2 . We used magnetization measurements and 27 Al NMR spectroscopy to access magnetic features related to the paramagnetic and ordered states (T C ¼56 K). While very precise DC SQUID magnetization measurements confirm ferromagnetic ordering, they show a relatively small hysteresis loop at 5 K reduced with a coercive field H Co $ 3000 Oe. The variable offset cumulative spectra (VOCS) acquired in the paramagnetic state show a high sensitivity of the 27 Al nuclei spectral parameters (Knight shifts and line broadening) to the ferromagnetic ordering, even at room temperature.

show abstract

Itinerant-Electron Magnetism and Spin Fluctuations—Aspects of Theories and Experiments

Yoshimura

2021

Creative Complex Systems

View full text Add to dashboard Cite

A27lNMR studies of itinerant electron ferromagneticNi3

Cited by 7 publications

References 32 publications

Research Progress on Ni-Based Antiperovskite Compounds

Research Progress on Ni-Based Antiperovskite Compounds

Ferromagnetic ordering in NpAl2: Magnetic susceptibility and Al nuclear magnetic resonance

Itinerant-Electron Magnetism and Spin Fluctuations—Aspects of Theories and Experiments

Contact Info

Product

Resources

About