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The RE$_{5}$Pt$_2$In$_4$ (RE = Gd-Tm) rare earth compounds have beeninvestigated by means of X-ray diffraction (XRD) as well as by DC and ACmagnetometric measurements. The compounds crystallize in an orthorhombiccrystal structure of the Lu$_{5}$Ni$_2$In$_4$-type (\textit{Pbam} space group,No.~55). With decreasing temperature the intermetallics undergo a transitionfrom para- to ferro-/ferri- (RE~=~Gd, Tb, Ho, Er) or antiferromagnetic state(RE~=~Tm). In case of Dy$_{5}$Pt$_2$In$_4$, the ferromagnetic state is reachedthrough an intermediate antiferromagnetic order present in a limitedtemperature range. The critical temperatures of magnetic ordering range from4.1~K (RE~=~Tm) up to 108~K (RE~=~Tb). For the majority of investigatedcompounds, a cascade of additional magnetic transitions is found below therespective critical temperatures of magnetic ordering. The magnetic moments arefound solely on the rare earth atoms, while the moments of the remaining Pt andIn atoms are absent or are too small to be detected while accompanied by thestrong rare earth's moments. The magnetocaloric (MCE) performance ofRE$_{5}$T$_2$In$_4$ (RE~=~Gd-Tm) is found quite good, especially while takinginto account the compounds with RE = Ho and Er. Maximum magnetic entropy change($-\Delta S_M^{max}$) reaches 11.8 (RE~=~Ho) or11.4~J$\cdot$kg$^{-1}\cdot$K$^{-1}$ (RE~=~Er) under magnetic flux densitychange of 0-9~T. Under the same conditions, the relative cooling power (RCP)and refrigerant capacity (RC) equal 607 and 495~J$\cdot$kg$^{-1}$ (RE~=~Ho) or434 and 341~J$\cdot$kg$^{-1}$ (RE~=~Er).

Characterization of magnetic properties, including magnetocaloric effect, of RE$_{5}$Pt$_2$In$_4$ (RE = Gd-Tm) compounds