Neutron Diffraction Investigation of the Atomic Magnetic Moment Orientation in the Antiferromagnetic Compound CrSb

Abstract

EDITOR 365 counting statistics only. The function P(x) is plotted in Fig. 2. The dotted line represents an exponential function with L-320 g/cm 2 and is seen to provide a good fit to the data for absorber thicknesses greater than ^1.2 cm. A transition maximum for zero absorber thickness is clearly indicated. Since P(x) represents an integrated value for neutron production over a half-inch of lead, the transition maximum for neutron production per unit volume of lead must occur within the first 1.25 cm (half-inch) of lead. FIG. 1. Unit cell of CrSb. Arrows indicate the relative alignments of atomic magnetic moments. Only chromium atoms are shown.

Electronic structure and magnetic properties in CrX (XP, As and Sb)

“…3. The magnetic moment/Cr atom is obtained to be 2.7 m B , which agrees well with the experimental values 2.7 [3] and 3.0 m B [2]. It is noted that the d electrons polarize strongly in CrSb.…”

“…It is noted that the significant decrease of atomic radius of the pnicogen atoms in the order of Sb, As, and P brings about the remarkable decrease of a-axis as well as the orthorhombic deformation as X changes from Sb to P, as seen in Table 1. Magnetic properties of CrX compounds depend also on X: CrSb shows a collinear antiferromagnetic order with the Cr magnetic moment of about 3.0 m B [2,3]; CrAs shows a double spiral magnetic order [4] with the magnetic moment/Cr atom of 1.7 m B , about a half of that in CrSb; CrP is a paramagnet with a magnetic susceptibility very weakly dependent on temperature [5]. It is also noted that the magnetic ordering of CrAs disappears by only a few per cent P-substitution for As in CrAs [6].…”

Structural and magnetic properties of CrSb compounds: NiAs structure

“…The compound CrSb crystallizes in the hexagonal NiAs structure. According to experimental data obtained by magnetic neutron diffraction experiment [3], it exhibits a collinear AFM (antiferromagnetic) structure up to the Néel temperature (T N = 705 K [3], T N = 723 K [4]). Takei et al investigated the ternary system CrTe 1−x Sb x [5] and also found a transition from the FM (ferromagnetic) structure to the AFM structure approaching the Sb rich region of concentrations.…”

Electronic Structure and Magnetic Properties of Chromium Chalcogenides and Pnictides with NiAs Structure

“…CrSe has NC umbrella‐like magnetic structure below T C ≈ 300 K with antiparallel alignment of the Cr1 and Cr2 sub‐lattices 11,12. On the other hand, the CrSb compound in the ordered NiAs phase exhibits the PM‐antiferromagnetic (AFM) transition at T N ≈ 700 K (705 K,13 723 K14). Takei et al investigated the ternary system CrTe 1– x Sb x 15 at different Te and Sb concentrations and found a transition from the FM to the AFM ground state structure approaching the Sb‐rich region of concentrations.…”

“…Takei et al investigated the ternary system CrTe 1– x Sb x 15 at different Te and Sb concentrations and found a transition from the FM to the AFM ground state structure approaching the Sb‐rich region of concentrations. The local magnetic moment per Cr atom found at room temperature (RT) is reported to be 2.7 μ B ,14 2.84 μ B ,15 or 3.0 μ B when extrapolated to 0 K 15…”