The magnetic ordering of polycrystalline Sm₂₆Co₁₁Ga₆-type {Gd, Dy, Ho, Tm}₂₆Co₉Ga₈ and Tb₂₆Co_6-8Ga_11-9 (space group P4/mbm, N 127, tP86) has been established using magnetic measurements. Gd₂₆Co₉Ga₈ exhibits soft ferromagnetic with the Curie temperature of 124 K Tb₂₆Co₆Ga₁₁, Tb₂₆Co₈Ga₉, Dy₂₆Co₉Ga₈ and Ho₂₆Co₉Ga₈ show mixed ferro-antiferromagnic ordering with the Curie temperatures of 76 K, 74 K, 28 K and 16 K, respectively. They display permanent magnet properties at low temperatures. The novel Tm₂₆Co₉Ga₈ demonstrates dominant antiferromagnetic ordering at 6 K, while it is a soft ferromagnet at 2 K.

Among these compounds, Tb₂₆Co₈Ga₉ exhibits largest magnetocaloric effect with magnetic entropy change of −9.2 J/kg⋅K at 76–81 K and relative large cooling power of ∼560 J/kg (field change of 50 kOe), while Tb₂₆Co₆Ga₁₁ is the best permanent magnet with a coercivity of 9 kOe, residual magnetization of 3.26 μ_B per Tb and theoretical energy product of 200 kJ/m³ at 2 K.

多晶Sm ₂₆ Co ₁₁ Ga ₆型{Gd，Dy，Ho，Tm} ₂₆ Co ₉ Ga ₈和Tb ₂₆ Co _6-8 Ga _11-9（空间群P 4 / mbm，N 127，tP 86）已使用磁测量建立。Gd ₂₆ Co ₉ Ga ₈具有居里温度为124 K的软铁磁Tb ₂₆ Co ₆ Ga ₁₁，Tb ₂₆ Co ₈ Ga ₉，Dy₂₆ Co ₉ Ga ₈和Ho ₂₆ Co ₉ Ga _8分别显示了居里温度分别为76 K，74 K，28 K和16 K的混合铁-反铁磁序列。它们在低温下表现出永磁特性。新型Tm ₂₆ Co ₉ Ga ₈在6 K时表现出显着的反铁磁有序性，而在2 K时则是软铁磁体。

在这些化合物中，Tb ₂₆ Co ₈ Ga ₉表现出最大的磁热效应，在76-81 K时的磁熵变为-9.2 J / kg·K，相对较大的冷却功率为560 J / kg（场变化为50 kOe），而Tb的₂₆钴₆镓₁₁为具有9千奥斯特，3.26μ的剩余磁化的矫顽力最好永久磁铁_乙每Tb和理论能量乘积200千焦/平方米的³在2 K.