ACTA

Maltese Cross Anisotropy in Antiferromagnetic State of Metallic Ho_0.5Lu_0.5B₁₂ with Dynamic Charge Stripes

N. Sluchanko^{a, b}, A. Khoroshilov^{a, b}, V. Krasnorussky^a, K. Krasikov^a, A. Bogach^a, S. Demishev^{a, b}, N. Shitsevalova^c, V. Filipov^c, S. Gabáni^d, K. Siemensmeyer^e, S. Gavrilkin^f, K. Flachbart^d
^aProkhorov General Physics Institute, RAS, Vavilov str. 38, 119991 Moscow, Russia
^bMoscow Institute of Physics and Technology, Institutskiy per. 9, Dolgoprudny, Moscow Region 141700 Russia
^cInstitute for Problems of Materials Science, NASU, Krzhizhanovsky str. 3, 03142 Kyiv, Ukraine
^dInstitute of Experimental Physics SAS, Watsonova 47, 04001 Košice, Slovakia
^eHahn Meitner Institut Berlin, D 14109 Berlin, Germany
^fLebedev Physical Institute of RAS, Leninskiy Prospekt 53, 119991 Moscow, Russia

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The model fcc system Ho_0.5Lu_0.5B₁₂ with substitutional disorder of Ho-Lu ions, dynamic charge stripes, and a complex AF ground state has been studied by magnetoresistance at low temperatures in magnetic field up to 80 kOe. For this non-equilibrium AF metal the angular H-φ-T magnetic phase diagram in the form of a ``Maltese cross'' has been constructed experimentally for the first time. It was shown that the dramatic symmetry lowering of the AF ground state in this rare earth dodecaboride should be attributed to the redistribution of charge carriers into dynamic charge stripes due to RKKY oscillations of the conduction electrons spin density. This redistribution causes extraordinary changes in the indirect exchange interaction between magnetic moments of Ho³⁺ ions and results in the emergence of a number of various magnetic phases and phase transitions.

DOI:10.12693/APhysPolA.137.756
topics: Antiferromagnetic metals, Dynamic charge stripes