Ferromagnetic ordering in NpAl2: Magnetic susceptibility and 27Al nuclear magnetic resonance

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:387

Article

Martel, L.¹  Griveau, J. -C.¹  Eloirdi, R.¹  Selfslag, C.¹  Colineau, E.¹  Caciuffo, R.¹ 

[1] European Commiss, Joint Res Ctr, Inst Transuranium Elements, D-76125 Karlsruhe, Germany

关键词: Magnetic susceptibility;    Al-27 NMR;    Low temperature;    Neptunium;    Intermetallic;    Ferromagnetism;   

DOI  :  10.1016/j.jmmm.2015.03.089

来源: Elsevier

【 摘 要 】

We report on the magnetic properties of the neptunium based ferromagnetic compound NpAl2. We used magnetization measurements and Al-27 NMR spectroscopy to access magnetic features related to the paramagnetic and ordered states (T-c = 56 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 similar to 3000 Oe. The variable offset cumulative spectra (VOCS) acquired in the paramagnetic state show a high sensitivity of the Al-27 nuclei spectral parameters (Knight shifts and line broadening) to the ferromagnetic ordering, even at room temperature. 2015 The Authors. Published by Elsevier B.V.

【 授权许可】

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