Published November 1, 2007 | Version v1
Journal article Metadata-only

Magnetic behavior of RMn2+xAl10-x (R=La,Gd) crystals

Creators

  • 1. Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011 (United States)
  • 2. Ames Laboratory, Ames, Iowa 50011 (United States)
  • 3. Department of Chemistry, Iowa State University, Ames, Iowa 50011 (United States)

Description

The crystallographic and magnetic properties of the solution grown RMn2+xAl10-x (R=Gd and La) crystals with tetragonal (P4/nmm) structure are investigated. For these, single-crystal x-ray diffraction results have shown the preferential occupation of excess manganese on the aluminum 8i crystallographic site. Due to excess Mn, there is evidence of local-moment magnetism in LaMn2+xAl10-x and their random distribution is thought to be responsible for the magnetic correlations below ∼50 K and the spin-glass behavior below ∼3 K. For GdMn2+xAl10-x, the extra manganese influences temperature below which the sample enters into a state with a net ferromagnetic component: TC≅16 K for GdMn2.21(4)Al9.79(4) and 25.5 K for GdMn2.39(2)Al9.61(2). Assuming a linear dependence between TC and excess Mn concentration, the fully stoichiometric and ordered GdMn2Al10 should have TC≅5 K

Additional details

Identifiers

DOI
10.1103/PhysRevB.76.174419;

Publishing Information

Journal Title
Physical Review. B, Condensed Matter and Materials Physics
Journal Volume
76
Journal Issue
17
Journal Page Range
p. 174419-174419.12
ISSN
1098-0121

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
39069612
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; S36: MATERIALS SCIENCE;
Descriptors DEI
ALUMINIUM; CRYSTALLOGRAPHY; GADOLINIUM ALLOYS; LANTHANUM ALLOYS; MAGNETIC MOMENTS; MAGNETIC PROPERTIES; MAGNETISM; MANGANESE; MANGANESE ALLOYS; MONOCRYSTALS; SPACE GROUPS; SPIN GLASS STATE; STOICHIOMETRY; TEMPERATURE RANGE 0013-0065 K; TETRAGONAL LATTICES; X-RAY DIFFRACTION
Descriptors DEC
ALLOYS; COHERENT SCATTERING; CRYSTAL LATTICES; CRYSTAL STRUCTURE; CRYSTALS; DIFFRACTION; ELEMENTS; METALS; PHYSICAL PROPERTIES; RARE EARTH ALLOYS; SCATTERING; SYMMETRY GROUPS; TEMPERATURE RANGE; TRANSITION ELEMENT ALLOYS; TRANSITION ELEMENTS

Optional Information

Notes
(c) 2007 The American Physical Society