Effect of Doping on the Physical Properties of La<sub>5</sub>Co<sub>2</sub>Ge<sub>3</sub>
ORAL
Abstract
The ternary crystal structure R5Co2Ge3 was discovered in 2017 [1]. When R is moment bearing, the low-temperature magnetic state(s) can be complex. For non-moment bearing R=La, the situation is simpler and intriguing; La5Co2Ge3 is a small moment, itinerant ferromagnetic compound having a transition temperature of 3.8K and an effective moment of 0.1µB [2]. In order to better understand the nature and possible tunability of this ferromagnetic transition, we report the substitution of Co with Ni, Fe and Rh as well as Ge with Si. Single crystals of La5(Co1-xAx)2Ge3 (A=Ni, Fe, Rh) and La5Co2(Ge1-xSix)3 were grown and characterized by magnetic and transport measurements. A comparison of the transition temperature, magnetic and transport properties will be discussed.
[1] Q. Lin, et al., Chem. Eur. J 23,10516 (2017) [2] S.M. Saunders, et al., PhysRevB 101, 214405 (2020)
[1] Q. Lin, et al., Chem. Eur. J 23,10516 (2017) [2] S.M. Saunders, et al., PhysRevB 101, 214405 (2020)
*This work was done at Iowa State University and supported by the Ames Laboratory, US DOE, Basic Sciences, Material Science and Engineering Division under contract no. DE-AC02-07CH11358
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Presenters
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Atreyee Das
- Iowa State University/ Ames Laboratory