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27Al NMR study in ZrNiAl.

B Nowak¹, S Hayashi

¹W. Trzebiatowski Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Wrocław. bnowak@int.pan.wroc.pl

Solid State Nuclear Magnetic Resonance

|March 29, 2001

Summary

We used 27Al NMR spectroscopy to study hexagonal ZrNiAl, revealing temperature-independent interactions. These findings offer insights into the microscopic properties of intermetallic compounds.

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Area of Science:

Solid-state chemistry
Nuclear magnetic resonance spectroscopy

Background:

Hexagonal ZrNiAl serves as a model for intermetallic compounds with this structure.
Understanding microscopic properties is crucial for materials science.

Purpose of the Study:

To investigate the microscopic properties of hexagonal ZrNiAl using 27Al NMR spectroscopy.
To analyze the influence of magnetic field strength and temperature on NMR spectral characteristics.

Main Methods:

27Al Nuclear Magnetic Resonance (NMR) spectroscopy was employed.
Static and Magic Angle Spinning (MAS) NMR spectra were recorded across varying magnetic fields (4.7-9.4 T) and temperatures (5-300 K).

Main Results:

NMR spectra are shaped by combined quadrupole and anisotropic shift interactions.
Key parameters include quadrupole coupling constant (3.3 MHz), asymmetry parameter (0.42), isotropic shift (393 ppm), and shift anisotropy (150 ppm).
These interactions and parameters were found to be temperature-independent.

Conclusions:

The study elucidates the microscopic interactions within hexagonal ZrNiAl.
NMR data provides a detailed characterization of the 27Al nuclei's environment.
The findings contribute to the understanding of intermetallic compound properties.

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