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Title: Synthesis and characterization of Ca-doped LaMnAsO

Journal Article · · Physical Review Materials
 [1];  [1];  [1];  [1];  [2];  [1];  [1]
  1. Ames Lab. and Iowa State Univ., Ames, IA (United States)
  2. Univ. of Missouri, Columbia, MO (United States)
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Here, we report on our attempt to hole-dope the antiferromagnetic semiconductor LaMnAsO by substitution of the La3+ site by Ca2+. We use neutron and x-ray diffraction, magnetic susceptibility, and transport techniques to characterize polycrystalline (La1–xCax)MnAsO samples prepared by solid-state reaction and find that the parent compound is highly resistant to substitution with an upper limit x ≤ 0.01. Magnetic susceptibility of the parent and the x = 0.002(xnom = 0.04) compounds indicate a negligible presence of magnetic impurities (i.e., MnO or MnAs). Rietveld analysis of neutron and x-ray diffraction data shows the preservation of both the tetragonal (P4/nmm) structure upon doping and the antiferromagnetic ordering temperature, TN = 355 ± 5 K.

Research Organization:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-07CH11358
OSTI ID:
1441003
Alternate ID(s):
OSTI ID: 1437677
Report Number(s):
IS-J-9679; PRMHAR; TRN: US1900862
Journal Information:
Physical Review Materials, Vol. 2, Issue 5; ISSN 2475-9953
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 3 works
Citation information provided by
Web of Science

References (19)

Structure and magnetic properties of L n MnSbO ( L n = La and Ce) journal March 2016
Local moments and symmetry breaking in metallic PrMnSbO journal September 2010
Giant magnetoresistance in oxypnictides (La,Nd)OMnAs journal January 2010
Short- and long-range magnetic order in LaMnAsO journal February 2016
Magnetic phase diagram of MnAs: Effect of magnetic field on structural and magnetic transitions journal September 1982
A Magnetic Transition Probed by the Ce Ion in Square-Lattice Antiferromagnet CeMnAsO journal September 2011
Variable temperature study of the crystal and magnetic structures of the giant magnetoresistant materials L MnAsO( L = La, Nd) journal April 2011
Persistence of local-moment antiferromagnetic order in Ba 1 − x K x Mn 2 As 2 journal April 2013
Spin Reorientation in the Square-Lattice Antiferromagnets RMnAsO (R = Ce, Nd): Density Functional Analysis of the Spin-Exchange Interactions between the Rare-Earth and Transition-Metal Ions journal June 2012
Effects of Pressure on the Magnetic Properties of MnAs journal January 1969
Electronic structure and magnetism in BaMn 2 As 2 and BaMn 2 Sb 2 journal February 2009
From antiferromagnetic insulator to ferromagnetic metal: Effects of hydrogen substitution in LaMnAsO journal January 2013
Insulator-to-metal transition and large thermoelectric effect in La 1−x Sr x MnAsO journal April 2012
Nd-induced Mn spin-reorientation transition in NdMnAsO journal November 2010
X-Ray Diffraction in Random Layer Lattices journal May 1941
Crystal, magnetic and electronic structures and properties of new BaMnPnF (Pn = As, Sb, Bi) journal July 2013
Spin reorientation and Ce-Mn coupling in antiferromagnetic oxypnictide CeMnAsO journal February 2015
Ba 1 − x K x Mn 2 As 2 : An Antiferromagnetic Local-Moment Metal journal February 2012
Itinerant Ferromagnetism in the As 4 p Conduction Band of Ba 0.6 K 0.4 Mn 2 As 2 Identified by X-Ray Magnetic Circular Dichroism journal May 2015

Figures / Tables (9)

FIG. 1(p. 2)figure FIG. 1
FIG. 2(p. 2)figure FIG. 2
FIG. 3(p. 3)figure FIG. 3
FIG. 4(p. 3)figure FIG. 4
FIG. 5(p. 4)figure FIG. 5
FIG. 6(p. 4)figure FIG. 6
FIG. 7(p. 5)figure FIG. 7
FIG. 8(p. 5)figure FIG. 8
TABLE I(p. 5)table TABLE I

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