Concentrational commensurate-incommensurate magnetic phase transition in Y sub(1 - x)Tb sub(x)Mn sub(6)Sn sub(6)

• Published in: Physics of metals and metallography Vol. 114; no. 7; pp. 566 - 572
• Main Authors: Bogdanov, S G, Mushnikov, N V, Terent'ev, P B, Gerasimov, E G, Grogor'ev, S V, Okorokov, AI, Chetverikov, YuO, Ekerleb, G, Pranzas, K, Pirogov, AN
• Format: Journal Article
• Language: English
• Published: 01.07.2013
• Subjects: Angular position; Antiferromagnetism; Ferromagnetism; Magnetic fields; Neutron diffraction; Phase transformations; Satellites; X-rays
• ISSN: 0031-918X; 1555-6190
• DOI: 10.1134/S0031918X13070028

The magnetic state of Y sub(1 - x)Tb sub(x)Mn sub(6)Sn sub(6) (with x less than or equal to 0.25) alloy is studied at different temperatures and magnetic fields by neutron diffraction. The alloy with x sub(c) = 0.22 exhibits an incommensurate-to-commensurate structure phase transition. The transition is accompanied by a decrease in the unit-cell volume. The weak dependence of the intensity of satellites on the x concentration and the monotonic displacement of their angular positions with increasing x allow us to conclude that the antiferromagnet arrow right ferrimagnet transition occurs through the uniform magnetic state. The incommensurate phase in YMn sub(6)Sn sub(6) exhibits four satellites, which are observed in the low-angle range of X-ray diffraction pattern and demonstrate different behavior with changing temperature. At 293 K, the antiferromagnet arrow right ferromagnet transition in the Y sub(1 -x)Tb sub(x)Mn sub(6)Sn sub(6) compound can be induced by applied magnetic field, in particular, the field mu sub(0) H = 0.3 T induces the transition in Tb sub(0.15)Y sub(0.85)Mn sub(6)Sn sub(6).