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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); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC02-07CH11358
OSTI ID:
1441003
Report Number(s):
IS-J--9679
Journal Information:
Physical Review Materials, Journal Name: Physical Review Materials Journal Issue: 5 Vol. 2; ISSN PRMHAR; ISSN 2475-9953
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (19)

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Spin reorientation and Ce-Mn coupling in antiferromagnetic oxypnictide CeMnAsO journal February 2015
Short- and long-range magnetic order in LaMnAsO journal February 2016
Structure and magnetic properties of L n MnSbO ( L n = La and Ce) journal March 2016
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
A Magnetic Transition Probed by the Ce Ion in Square-Lattice Antiferromagnet CeMnAsO journal September 2011
Insulator-to-metal transition and large thermoelectric effect in La 1−x Sr x MnAsO journal April 2012

Cited By (2)

Hole doping and antiferromagnetic correlations above the Néel temperature of the topological semimetal ( Sr 1 − x K x ) MnSb 2 journal July 2019
Crystal growth, microstructure, and physical properties of SrMnSb 2 journal February 2019

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