Doping dependence of the magnetic ground state in the frustrated magnets Ba$_2$$M$Te$_{1-x}$W$_{x}$O$_6$ ($M$ = Mn, Co)

Chaoxin Huang; Lisi Li; Peiyue Ma; Xing Huang; Tao Xie; Meng Wang

doi:10.1103/PhysRevB.111.184418

paper

Doping dependence of the magnetic ground state in the frustrated magnets Ba $_{2}$ $M$ Te $_{1 - x}$ W $_{x}$ O $_{6}$ ( $M$ = Mn, Co)

arXiv:2503.12777 · doi:10.1103/PhysRevB.111.184418

Abstract

Theoretically, the relative change of the Heisenberg-type nearest-neighbor coupling $J_{1}$ and next-nearest-neighbor coupling $J_{2}$ in the face-centered-cubic lattice can give rise to three main antiferromagnetic orderings of type-I, type-II, and type-III. However, it is difficult to tune the $J_{2} / J_{1}$ ratio in real materials. Here, we report studies on the influence of Te $^{6 +}$ and W $^{6 +}$ ions replacement to the magnetic interactions and the magnetic ground states in the double-perovskite compounds Ba $_{2}$ $M$ Te $_{1 - x}$ W $_{x}$ O $_{6}$ ( $M$ = Mn, Co). For Ba $_{2}$ MnTe $_{1 - x}$ W $_{x}$ O $_{6}$ , the W $^{6 +}$ doping on Te $^{6 +}$ site is successful in $0.02 \leq x \leq 0.9$ with short-range orders of the type-I ( $0.02 \leq x \leq 0.08$ ) and type-II ( $0.1 \leq x \leq 0.9$ ). In Ba $_{2}$ CoTe $_{1 - x}$ W $_{x}$ O $_{6}$ , x-ray diffraction measurements reveal two crystal structures, including the trigonal phase ( $0 \leq x \leq 0.1$ ) and the cubic phase ( $0.5 \leq x \leq 1$ ), between which is a miscibility gap. Two magnetic transitions are identified in the trigonal phase due to two magnetic subsystems, and the type-II magnetic order is observed in the cubic phase. Magnetic phase diagrams of Ba $_{2} M$ Te $_{1 - x}$ W $_{x}$ O $_{6}$ ( $M$ = Mn, Co) are established. Our work shows that the magnetic interactions and ground states of Ba $_{2}$ $M$ Te $_{1 - x}$ W $_{x}$ O $_{6}$ can be tuned effectively by the replacement of Te $^{6 +}$ by W $^{6 +}$ ions.

7 pages, 7 figures

Doping dependence of the magnetic ground state in the frustrated magnets Ba2​MTe1−x​Wx​O6​ (M = Mn, Co)

Abstract

References in corpus (20)

Doping dependence of the magnetic ground state in the frustrated magnets Ba $_{2}$ $M$ Te $_{1 - x}$ W $_{x}$ O $_{6}$ ( $M$ = Mn, Co)