Muon spin relaxation study of the (F[mu]F)[sup [minus]] ion in magnetic fluorides

Journal Article · Sat May 15 04:00:00 EDT 1993 · Journal of Applied Physics; (United States)

DOI:https://doi.org/10.1063/1.353584· OSTI ID:6674719

Noakes, D R ^[1]; Ansaldo, E J ^[2]; Luke, G M ^[3]

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1. Physics Department, Virginia State University, Petersburg, Virginia 23806 (United States)
2. Physics Department, University of Saskatchewan, Saskatoon SK S7N0W0 (Canada)
3. Physics Department, Columbia University, New York, New York 10027 (United States)

A positive muon implanted in a solid fluoride insulator can form a hydrogen-bonded (F[mu]F)[sup [minus]] ion, in which the nuclear magnetic interactions cause a distinctive zero-field (ZF) muon spin relaxation ([mu]SR) signal. In a fluoride material in which the anions have electronic magnetic moments, the muon's interaction with nearby [sup 19]F nuclear moments must compete with its interaction with more distant but much larger anion moments. We report observation of this competition in ZF-[mu]SR in MnF[sub 3] ([ital T][sub [ital N]]=43 K) and CuF[sub 2] ([ital T][sub [ital N]]=69 K). In both MnF[sub 3] and CuF[sub 2] characteristic ZF F[mu]F oscillations are observed above the Neel temperature. As temperature drops below [ital T][sub [ital N]] in MnF[sub 3] the relaxation rate of the (F[mu]F)[sup [minus]] signal increases dramatically. Below [ital T][sub [ital N]] in CuF[sub 2] a small-amplitude high-frequency coherent oscillation appears on top of the low-frequency (F[mu]F)[sup [minus]] signal.

• DOE Contract Number: FG05-88ER45353
• OSTI ID: 6674719
• Journal Information: Journal of Applied Physics; (United States), Journal Name: Journal of Applied Physics; (United States) Vol. 73:10; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360606* -- Other Materials-- Physical Properties-- (1992-)
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
CHARGED PARTICLES
COPPER COMPOUNDS
COPPER FLUORIDES
COPPER HALIDES
ELEMENTARY PARTICLES
FERMIONS
FLUORIDES
FLUORINE 19
FLUORINE COMPOUNDS
FLUORINE ISOTOPES
HALIDES
HALOGEN COMPOUNDS
IONS
ISOTOPES
LEPTONS
LIGHT NUCLEI
MAGNETIC MATERIALS
MAGNETIC MOMENTS
MANGANESE COMPOUNDS
MANGANESE FLUORIDES
MANGANESE HALIDES
MATERIALS
MATTER
MUON SPIN RELAXATION
MUONIC IONS
MUONS
MUONS PLUS
NEEL TEMPERATURE
NUCLEAR MAGNETIC MOMENTS
NUCLEAR PROPERTIES
NUCLEI
ODD-EVEN NUCLEI
PHYSICAL PROPERTIES
RELAXATION
STABLE ISOTOPES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE