التفاصيل البيبلوغرافية
| العنوان: |
$\mu$SR study of spin freezing and persistent spin dynamics in NaCaNi$_2$F$_7$ |
| المؤلفون: |
Cai, Y., Wilson, M. N., Hallas, A. M., Liu, L., Frandsen, B. A., Dunsiger, S. R., Krizan, J. W., Cava, R. J., Uemura, Y. J., Rubel, O., Luke, G. M. |
| سنة النشر: |
2018 |
| المجموعة: |
Condensed Matter |
| مصطلحات موضوعية: |
Condensed Matter - Strongly Correlated Electrons |
| الوصف: |
A new pyrochlore compound, NaCaNi$_2$F$_7$, was recently synthesized and has a single magnetic site with spin-1 Ni$^{2+}$. We present zero field (ZF) and longitudinal field (LF) muon spin rotation ($\mu$SR) measurements on this pyrochlore. Density functional theory (DFT) calculations show that the most likely muon site is located between two fluorine ions, but off-centre. A characteristic F-$\mu$-F muon spin polarization function is observed at high temperatures where Ni spin fluctuations are sufficiently rapid. The Ni$^{2+}$ spins undergo spin freezing into a disordered ground state below 4~K, with a characteristic internal field strength of 140~G. Persistent Ni spin dynamics are present to our lowest temperatures (75~mK), a feature characteristic of many geometrically frustrated magnetic systems. |
| نوع الوثيقة: |
Working Paper |
| DOI: |
10.1088/1361-648X/aad91c |
| URL الوصول: |
http://arxiv.org/abs/1806.10970 |
| رقم الانضمام: |
edsarx.1806.10970 |
| قاعدة البيانات: |
arXiv |