Physical properties and magnetic phase diagram of (Cr90Ir10)100-yVy alloy system

• Published in: Journal of alloys and compounds 2021-08, Vol.872, p.1, Article 159635
• Main Authors: Fernando, P.R., Prinsloo, A.R.E., Sheppard, C.J.
• Format: Article
• Language: English
• Subjects: Alloy systems; Antiferromagnetism; Cooling; Electrical resistivity; Magnetic phase diagram; Magnetic properties; Magnetization; Phase diagrams; Phase transitions; Physical properties; Seebeck coefficient; Seebeck effect; Spin density waves; Spin-density-wave; Transition temperature
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2021.159635

•Physical properties of (Cr90Ir10)100-yVy alloys, with 0 ≤ y ≤ 14.3, were explored.•XRD, SEM, EDS, resistivity, magnetization, as well as Seebeck and Hall coefficients is shown.•Quantum criticality were found and a magnetic phase diagram constructed for (Cr90Ir10)100-yVy.•RH and nH = (eRH)−1 at 0 K indicate that holes are the dominant charge carriers in (Cr90Ir10)100-yVy. The magnetic phase diagram of (Cr90Ir10)100-yVy alloy system has been constructed using the TN values obtained from the electrical resistivity, ρ, Seebeck coefficient, S, and magnetization, M, as function of temperature measurements. The present study furthermore proposes a V induced commensurate (C) spin-density-wave (SDW) to incommensurate (I) SDW phase transition on cooling, at a transition temperature TCI, in certain samples in the series investigated. MT measurements on the sample with y = 2.4 shows only one transition associated with the Néel transition at TN, with no additional transition that can be associated with TCI and is accepted to be in the CSDW phase at all temperatures. It is hypothesized that the addition of V destabilizes the CSDW phase and introduces an ISDW phase at lower temperatures in the samples with y = 3.4, y = 3.6 and y = 5.4, as the χ(T) curves of these samples show two transitions. It is suggested that all the samples with y ≤ 5.4 show magnetic phase transitions at TN on cooling from the paramagnetic (PM) to CSDW phase. On further addition of V the samples with y > 5.4 the obtained χ(T) curves show only one transition that suggest that these samples are in the ISDW phase at all temperatures below TN. Results suggest a quantum critical behavior at V concentration of yc = 9.033.