P31 NMR studies of the 13-depleted two-dimensional anisotropic kagome lattice system BaCu2(PO4)2(H2O),Physical Review B

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P31 NMR studies of the 13-depleted two-dimensional anisotropic kagome lattice system BaCu2(PO4)2(H2O)
Physical Review B ( IF 3.2 ) Pub Date : 2024-09-06 , DOI: 10.1103/physrevb.110.125112
V. K. Singh ₁ , J. Link ₂ , K. Kargeti ₃ , S. K. Panda ₃ , I. Heinmaa ₂ , C. Dhanasekhar ₄ , Monika Jawale ₄ , Kwang-Tak Kim ₅ , Kee Hoon Kim _{5,

5} , T. Chakrabarty ₆ , A. V. Mahajan ₄ , R. Stern ₂ , B. Koteswararao ₁

Affiliation

The subtle interaction of low dimensionality and spin correlations in two-dimensional quantum magnets results in novel states of matter. Herein, we investigate the structural, magnetic, heat capacity,

{}^{31}P

nuclear magnetic resonance (NMR) measurements, and density functional theory

+

Hubbard

U

(DFT

+ U

) electronic structure calculations on the

{Cu}^{2 +}

(

S = \frac{1}{2}

)-based compound

{BaCu}_{2} {({PO}_{4})}_{2} (H_{2} O)

. Based on the hopping parameters obtained from DFT, the titled compound comprises the 2D layer of 1/3-depleted anisotropic kagome lattice with the magnetic couplings

J_{1}, J_{2}, J_{3}

, and

J_{4}

. At high temperatures, magnetic susceptibility (

χ

) exhibits paramagnetic behavior, with a Curie-Weiss temperature of

θ_{C W} \approx - 67

K, indicating the presence of dominant antiferromagnetic interactions. The appearance of a broad maximum in the magnetic susceptibility and heat capacity reveals the low-dimensional nature of the compound. While the sharp magnetic anomaly features are not seen clearly in the bulk measurements, the