Fe-doping induced suppression of the second magnetic transition in Sr4Ru3O10

Yan Liu, Weiwei Chu, Yu Wang, Jiyong Yang, Haifeng Du, Wei Ning, Zhe Qu, Peigang Li, Zhuan Xu, Zhiqiang Mao, and Mingliang Tian

Phys. Rev. B 99, 214418 – Published 12 June 2019

Abstract

Ruthenium oxide (

S r_{4} R u_{3} O_{10}

) exhibits a second magnetic transition at a temperature

T_{M}

below its ferromagnetic (FM) transition (

T_{C} \sim 105

K), which has attracted considerable attention in the past two decades. Here, we successfully grew

S r_{4} {(R u_{1 - x} F e_{x})}_{3} O_{10}

(

x = 0.01

) crystal and systematically investigated the magnetotransport property of its nanosheets. We found a feature that there is an in-plane FM order aligned along ⟨110⟩ directions below

T_{C}

without the occurrence of the second magnetic transition at

T_{M}

, which is in contrast to that expected in pure

S r_{4} R u_{3} O_{10}

nanosheets, where the in-plane FM order will rotate to the

c

direction below

T_{M}

. Furthermore, a metamagnetic-like transition is also observed below ∼50 K at about 2 T when the magnetic field is applied along the

c

axis. These results unambiguously demonstrate that the second magnetic transition at

T_{M}

is actually a consequence of spin reorientation induced by the inherent coupling between the spin and lattice, which can be effectively tuned by element doping.