التفاصيل البيبلوغرافية
| العنوان: |
SrCu(OH)$_3$Cl, an ideal isolated equilateral triangle spin $S$ = 1/2 model system |
| المؤلفون: |
Pal, Sudip, Doležal, Petr, Strøm, Scott A., Bertaina, Sylvain, Pustogow, Andrej, Kremer, Reinhard K., Dressel, Martin, Puphal, Pascal |
| سنة النشر: |
2024 |
| المجموعة: |
Condensed Matter |
| مصطلحات موضوعية: |
Condensed Matter - Strongly Correlated Electrons, Condensed Matter - Materials Science |
| الوصف: |
We have investigated the magnetic ground state properties of the quantum spin trimer compound strontium hydroxy copper chloride SrCu(OH)$_3$Cl using bulk magnetization, specific heat measurements, nuclear magnetic resonance (NMR), and electron spin resonance (ESR) spectroscopy. SrCu(OH)$_3$Cl consists of layers with isolated Cu$^{2+}$ triangles and hence provides an opportunity to understand the magnetic ground state of an isolated system of \textit{S} = 1/2 arranged on an equilateral triangle. Although magnetization measurements do not exhibit a phase transition to a long-range ordered state down to \textit{T} = 2 K, they reveal the characteristic behavior of isolated trimers with an exchange of $J = 154$~K. The Curie-Weiss behavior changes around 50--80~K, as is also seen in the NMR spin-lattice relaxation rate. In zero magnetic field, our specific heat data establish a second-order phase transition to an antiferromagnetic ground state below \textit{T}= 1.2 K. We have drawn a magnetic field-temperature ($H$-$T$) phase diagram based on the specific heat measurements. The ESR data show divergence of the linewidth at lower temperatures, which precedes the phase transition to an antiferromagnetic long-range ordered state with unconventional critical exponents. The temperature variation of the $g$-factor further confirms the antiferromagnetic phase transition and reflects the underlying magneto-crystalline anisotropy of the compound. |
| نوع الوثيقة: |
Working Paper |
| DOI: |
10.1103/PhysRevResearch.6.033027 |
| URL الوصول: |
http://arxiv.org/abs/2401.12098 |
| رقم الانضمام: |
edsarx.2401.12098 |
| قاعدة البيانات: |
arXiv |