ACTA

Magnetoresistance Anisotropy and Magnetic H-T Phase Diagram of Tm_0.996Yb_0.004B₁₂

N.E. Sluchanko^a, A.N. Azarevich^a,b, A.V. Bogach^a, V.V. Glushkov^a,b, S.V. Demishev^a,b, S.Yu. Gavrilkin^c, S. Gabani^d, K. Flachbart^d, N.Yu. Shitsevalova^e, V.B. Filipov^e, J. Vanacken^f, V.V. Moshchalkov^f, J. Stankiewicz^g
^aGeneral Physics Institute of RAS, 119991 Moscow, Russia
^bMoscow Institute of Physics and Technology, 141700 Moscow Region, Russia
^cPhysical Institute of RAS, 53 Leninsky pr.,119991 Moscow, Russia
^dInstitute of Experimental Physics of SAS, 040 01 Košice, Slovak Republic
^eInstitute for Problems of Materials Science NASU, 03680 Kiev, Ukraine
^fInst. for Nanoscale Physics and Chemistry, KU Leuven, Leuven 3001, Belgium
^gIns. de Ciencia de Materiales de Aragón, Facultad de Ciencias, 50009 Zaragoza, Spain

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The antiferromagnetic ground state has been studied by transverse magnetoresistance, heat capacity and magnetization measurements, which were carried out on high quality single crystals of Tm_0.996Yb_0.004B₁₂ dodecaboride in strong magnetic fields at liquid helium temperatures. Both antiferromagnetic-paramagnetic (AF-P) and spin-orientation (AF1-AF2) phase transitions have been observed, and allowed to construct a complicated magnetic H-T phase diagram for this compound. Strong magnetoresistance anisotropy was found both in AF states (ρ(H||[110])/ρ(H||[111]) ~ 1.2 at H ~ 20 kOe) and at the critical field of AF-P transition (H_N[100]/H_N[111] ~ 1.25) in this magnetic metal with a simple fcc crystal structure.

DOI: 10.12693/APhysPolA.126.332
PACS numbers: 72.15.Gd, 73.43.Qt, 75.30.Kz, 75.20.Hr, 75.50.Ee