Distinct magnetic ground states in Shastry-Sutherland lattice materials: P r2 B e2Ge O7 versus N d2 B e2Ge O7

Liu，Andi1,2; Song，Fangyuan1; Cao，Yaotao2; Ge，Han3; Bu，Huanpeng3; Zhou，Jin1; Qin，Yuqi1; Zeng，Qingyuan1; Li，Jingxin4; Ling，Langsheng4; Tong，Wei4; Sheng，Jieming3,5; Yang，Ming1; Wu，Liusuo3; Guo，Hanjie2; Tian，Zhaoming1

2024-05-01

10.1103/PhysRevB.109.184413

Physical Review B   影响因子和分区

2469-9950

2469-9969

The rare-earth (RE) based Shastry-Sutherland lattice (SSL) materials have attracted recent attention for exploring the exotic magnetic phases of 4f electrons. Here, we present a comparative study on low-temperature magnetization and specific-heat results of two tetragonal structure compounds RE2Be2GeO7 (RE=Pr, Nd), where the non-Kramers Pr3+ (J=4) ions and Kramers Nd3+ (J=9/2) ions are located on the SSL geometry with "AA"-type stacking fashion along the [001] axis. Temperature-dependent magnetic susceptibility and isothermal field-dependent magnetization M(B) measurements reveal that these two compounds share a similar Ising-like magnetic anisotropy with easy magnetization along the [001] axis and additional fourfold symmetry within the ab plane. For their magnetic ground states, Nd2Be2GeO7 exhibits the coexistence of short-range spin correlation and long-range magnetic order with TN=0.26 K in zero magnetic field, while Pr2Be2GeO7 does not show any signature of long-range magnetic ordering at temperatures as low as 0.08 K. The ac susceptibility and specific-heat analysis of Pr2Be2GeO7 reveal a dynamic spin-freezing behavior below ∼0.22 K similar to that observed in Pr-based pyrochlore spin-ice systems.

SCI ; EI

英语

其他

PHYSICS

2-s2.0-85192677444

Scopus

1.Wuhan National High Magnetic Field Center,School of Physics,Huazhong University of Science and Technology,Wuhan,Hubei,430074,China
2.Songshan Lake Materials Laboratory,Dongguan,Guangdong,523808,China
3.Department of Physics,Southern University of Science and Technology,Shenzhen,518055,China
4.Anhui Key Laboratory of Low-Energy Quantum Materials and Devices,High Magnetic Field Laboratory,HFIPS,Chinese Academy of Sciences,Hefei,Anhui,230031,China
5.School of Physical Sciences,Great Bay University,Dongguan,523000,China

Liu，Andi,Song，Fangyuan,Cao，Yaotao,et al. Distinct magnetic ground states in Shastry-Sutherland lattice materials: P r2 B e2Ge O7 versus N d2 B e2Ge O7[J]. Physical Review B,2024,109(18).

Liu，Andi.,Song，Fangyuan.,Cao，Yaotao.,Ge，Han.,Bu，Huanpeng.,...&Tian，Zhaoming.(2024).Distinct magnetic ground states in Shastry-Sutherland lattice materials: P r2 B e2Ge O7 versus N d2 B e2Ge O7.Physical Review B,109(18).

Liu，Andi,et al."Distinct magnetic ground states in Shastry-Sutherland lattice materials: P r2 B e2Ge O7 versus N d2 B e2Ge O7".Physical Review B 109.18(2024).