Magnetic properties of RE2MnGe6 (RE = La, Ce) and YMn0.3Ge2 germanides

• We determine crystal structure and magnetic properties of new YMn0.3Ge2 compound.
• This compound below 395 K is an antiferromagnet with ferromagnetic component.
• We determine the magnetic properties of RE2MnGe6 (R = La, Ce) compounds.
• These compounds are ferromagnets with Tc equal to 177 K (La) and 150 K (Ce).

The magnetic data of RE2MnGe6 (RE = La, Ce) and YMn0.3Ge2 are reported. La2MnGe6 and Ce2MnGe6 crystallize in the orthorhombic Ce2CuGe6 structure type, space group Amm2 (No. 38). The non-stoichiometric YMn0.3Ge2 compound crystallizes with the orthorhombic CeNiSi2-type structure (space group Cmcm (No. 36)). The studied RE2MnGe6 (RE = La, Ce) intermetallics are characterized by ferromagnetic properties with Curie temperatures 177 (La) and 150 K (Ce), respectively. For YMn0.3Ge2 the low-field magnetic measurements indicate the antiferromagnetic property below 395 K with the small ferromagnetic component. The values of the magnetic moments in the ordered state indicate the ferromagnetic ordering in La2MnGe6 and complex magnetic order with the ferromagnetic component in YMn0.3Ge2 and Ce2MnGe6. The hysteresis loop and values of the coercivity field indicate that these compounds are soft magnetic materials.

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