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Using polarized neutron diffraction and x-ray resonant magnetic scattering(XRMS) techniques, multiple phase transitions were revealed in an underdoped,non-superconducting Eu(Fe$_{1-x}$Ir$_{x}$)$_{2}$As$_{2}$ ($\mathit{x}$ = 0.06)single crystal. Compared with the parent compound EuFe$_{2}$As$_{2}$, thetetragonal-to-orthorhombic structural phase transition and theantiferromagnetic order of the Fe$^{2+}$ moments are significantly suppressedto $\mathit{T_{S}}$ = 111 (2) K and $\mathit{T_{N,Fe}}$= 85 (2) K by 6% Irdoping, respectively. In addition, the Eu$^{2+}$ spins order within the$\mathit{ab}$ plane in the A-type antiferromagnetic structure similar to theparent compound. However, the order temperature is evidently suppressed to$\mathit{T_{N,Eu}}$= 16.0 (5) K by Ir doping. Most strikingly, the XRMSmeasurements at the Ir $\mathit{L_{3}}$ edge demonstrates that the Ir5$\mathit{d}$ states are also magnetically polarized, with the same propagationvector as the magnetic order of Fe. With $\mathit{T_{N,Ir}}$ = 12.0 (5) K, theyfeature a much lower onset temperature compared with $\mathit{T_{N,Fe}}$. Ourobservation suggests that the magnetism of the Eu sublattice has a considerableeffect on the magnetic nature of the 5$\mathit{d}$ Ir dopant atoms and thereexists a possible interplay between the localized Eu$^{2+}$ moments and theconduction $\mathit{d}$-electrons on the FeAs layers.

Magnetic polarization of Ir in underdoped, non-superconducting Eu(Fe$_{0.94}$Ir$_{0.06}$)$_{2}$As$_{2}$