Determination of the magnetic q vectors in the heavy fermion superconductor Ce3PtIn11

TL;DR

This study uses $^{115}$In NQR spectroscopy to determine the magnetic propagation vectors in the heavy fermion superconductor Ce3PtIn11, revealing temperature-dependent changes in magnetic order and providing detailed insights into its antiferromagnetic phases.

Contribution

The paper introduces a transferred hyperfine field analysis method to accurately determine magnetic q vectors in Ce3PtIn11, improving upon previous dipolar models and clarifying magnetic structures.

Findings

Ce(2) site has a dominant magnetic contribution with a small moment at Ce(1).

Propagation vectors change with temperature, indicating different magnetic phases.

Hyperfine field analysis reveals detailed magnetic ordering vectors.

Abstract

An analysis with transferred hyperfine field has been performed on the spectra of the $^{115}$In nuclear quadrupole resonance experiments of heavy fermion superconductor Ce$_{3}$PtIn$_{11}$ exhibiting co-occurrence of two successive antiferromagnetic orderings ($T_{\rm N1}$ = 2.2 K and $T_{\rm N2}$ = 2.0 K) followed by superconducting transition ($T_{\rm c}$ = 0.32 K). The spectral changes at magnetic transition temperatures $T_{\rm N1}$ and $T_{\rm N2}$ indicate that the Ce(2) site has the dominant magnetic contribution, with a small magnetic moment, but not negligible, at the Ce(1) site. Our analysis using transferred hyperfine field which overcomes the previous simple dipolar model evinces that for $T_{\rm N2} < T < T_{\rm N1 } $, the propagation vectors at the Ce(1) and Ce(2) sublattices are q1 = q2 = (1/2, 1/2, 0 or 1/2), whereas for $T < T_{\rm N2 }$, the propagation vectors are q1 = (1/2,~1/2, 1/6 or 1/3) and q2 = (1/2, 1/2, 1/2 or 0), respectively.