Magnetic Properties of the Iron-Group Metal Phosphides

Abstract

We have investigated the temperature-dependence of the magnetic moment of Cr3P, Mn3P, Fe3P and Ni3P including solid solutions of these compounds with each other. These measurements indicate Ni3P and Cr3P have a temperature-independent Pauli-type paramagnetism. Mn3P is antiferromagnetic (TN≈115°K) with a moment of 1.68 μB for Mn based on the high-temperature susceptibility. Solid solutions of Fe3−xCoxP up to x=0.6 show that Co contributes a moment of 1.6 μB ferromagnetically aligned with the iron. In the Fe3−xNixP system, nickel acts as a diluent for all values of x. Solid solutions of Fe3−xMnxP up to x=1.5 could also be formed; in this case, antiferromagnetic ordering lowers the magnetic moment significantly. The variation of the magnetic moments with composition for the M3P series closely resembles the Slater-Pauling curve.

Structural and magnetic properties of(Fe1−xMnx)Broddefalk1, James2, Liu3 et al. 2000Phys. Rev. B141140View full textAdd to dashboardCite

“…This means that the exchange splitting of the material is large so that additional valence electrons enter states of only one of the spin channels. In (Fe 1Ϫx Co x ) 3 P there are about 6.5-7.5 3d electrons per metal atom ͑depending on Co concentration͒ and consequently additional valence electrons provided by alloying of Co enter the spin down band causing a reduction of magnetic moment, which is consistent with observations. With this in mind one can speculate that replacing Fe for Mn ͑which has one less valence electron compared to Fe͒ should increase the magnetic moment of the alloy due to the same band arguments.…”

“…[1][2][3][4][5][6][7] Fe 3 P is a ferromagnetic compound with a Curie temperature of 692 K ͑Ref. 5͒ and a saturation magnetization of 1.70 B /Fe atom at room temperature 1,4 and 1.89 B /Fe atom at 10 K. 5 The crystal structure is tetragonal ͑space group I 4 ) with three different Fe sites ͑denoted I, II, and III͒.…”

The shoulder in the second peak of the pair correlation function of superheated liquid Fe80B20 alloy

“…Therefore, each B atom in o-Fe 3 B is coordinated to 9 Fe atoms, and has no B atom as its nearest neighbor. In t-Fe 3 B [23], each B atom has nine Fe neighbors, six situated at the corners of a highly distorted trigonal prism and three outside of the four-sided prism faces; Fe-Fe has fifteen kinds of bonding length, while Fe-B has nine kinds, with the arithmetic average value as 2.56 Å and 2.22 Å respectively. There is no B-B bonding, but three kinds of B-B distance can be found, which are 3.34 Å, 3.56 Å and 4.14 Å respectively.…”

Stability and electronic structure of the Co–P compounds from first-principle calculations

“…Because Co 3 P only exists in solid solutions but it is nonexistent under usual conditions [24], Co 3 P compound is not taken into consideration. In this paper, first-principle calculations based on density functional theory were implemented to investigate the crystal structure, structural stability and the bonding mechanism 0925-8388/$ -see front matter © 2010 Elsevier B.V. All rights reserved.…”