DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Ce 3 - x Mg x Co 9 : Transformation of a Pauli Paramagnet into a Strong Permanent Magnet

Journal Article · · Physical Review Applied
 [1];  [2];  [3];  [3];  [1];  [1]
  1. Ames Lab. and Iowa State Univ., Ames, IA (United States) and Dept. of Physics and Astronomy
  2. Ames Lab. and Iowa State Univ., Ames, IA (United States); Univ. of California, Davis, CA (United States). Dept. of Physics
  3. Ames Lab. and Iowa State Univ., Ames, IA (United States)

In this article we report on the synthesis of single-crystal and polycrystalline samples of Ce3-xMgxCo9 solid solution (0 ≤ x ≲ 1.4) and characterization of their structural and magnetic properties. The crystal structure remains rhombohedral in the whole composition range and Mg partially replaces Ce in the 6c site of the CeCo3 structure. Ferromagnetism is induced by Mg substitutions starting as low as x = 0.18 and reaching a Curie temperature as high as 450 K for x = 1.35 . Measurements on single crystals with x = 1.34 and TC = 440 K indicate an axial magnetic anisotropy with an anisotropy field of 6 T and a magnetization of 6 μB/f.u. at 300 K. Coercicity is observed in the polycrystalline samples consistent with the observed axial magnetic anisotropy. Our discovery of ferromagnetism with large axial magnetic anisotropy induced by substituting a rare-earth element by Mg is a very promising result in the search of inexpensive permanent-magnet materials and suggests that other nonmagnetic phases, similar to CeCo3, may also conceal nearby ferromagnetic phases.

Research Organization:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Critical Materials Institute (CMI)
Grant/Contract Number:
AC02-07CH11358
OSTI ID:
1422758
Alternate ID(s):
OSTI ID: 1422437
Report Number(s):
IS-J--9568; {"","Journal ID: ISSN 2331-7019","Journal ID: ISSN PRAHB2"}
Journal Information:
Physical Review Applied, Journal Name: Physical Review Applied Journal Issue: 2 Vol. 9; ISSN 2331-7019; ISSN PRAHB2
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (15)

Magnetic properties of CeCo3, Ce2Co7 and CeNi3 and their ternary hydrides journal August 1980
X-Ray diffraction on large single crystals using a powder diffractometer text January 2016
Structural and Ferromagnetic Properties of an Orthorhombic Phase of MnBi Stabilized with Rh Additions journal July 2015
X-Ray diffraction on large single crystals using a powder diffractometer journal June 2016
High-temperature solution growth of intermetallic single crystals and quasicrystals journal May 2001
Discovery of ferromagnetism with large magnetic anisotropy in ZrMnP and HfMnP text January 2016
Crystal structure, hydrogen absorption-desorption behavior and magnetic properties of the Nd3−Mg Co9 alloys journal February 2017
Magnetic properties of NdCo3 and its γ-phase hydride NdCo3H4.1 journal December 1993
Cerium: An Unlikely Replacement of Dysprosium in High Performance Nd-Fe-B Permanent Magnets journal March 2015
EXPGUI , a graphical user interface for GSAS journal April 2001
New CeMgCo4 and Ce2MgCo9 compounds: Hydrogenation properties and crystal structure of hydrides journal March 2012
Discovery of ferromagnetism with large magnetic anisotropy in ZrMnP and HfMnP journal August 2016
Structural and ferromagnetic properties of an orthorhombic phase of MnBi stabilized with Rh additions text January 2015
A study of the physical properties of single crystalline Fe5B2P journal March 2016
A critical review on solvent extraction of rare earths from aqueous solutions journal February 2014

Cited By (3)

Single-Crystal Permanent Magnets: Extraordinary Magnetic Behavior in the Ta -, Cu -, and Fe -Substituted Ce Co 5 Systems journal January 2019
Synthesis and crystal structure of new compounds from the Y–Mg–Ni system journal January 2019
Borderline Magnetism: How Adding Mg to Paramagnetic Ce Co 3 Makes a 450-K Ferromagnet with Large Magnetic Anisotropy journal September 2018