Magnetic first-order phase transition and crossover associated with random anisotropy in crystalline Dy[sub [ital x]]Y[sub 1[minus][ital x]]Al[sub 2]

Journal Article · Thu Apr 01 04:00:00 EST 1993 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.47.7892· OSTI ID:6669964

del Moral, A; Arnaudas, J I ^[1]; Gehring, P M ^[2]; Salamon, M B ^[3]; Ritter, C ^[4]; Joven, E ^[1]; Cullen, J ^[5]

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1. Laboratorio de Magnetismo, Departamento de Fisica de Materia Condensada and Instituto de Ciencia de Materiales de Aragon, Universidad de Zaragoza and Consejo Superior de Investigaciones Cientificas, 50009 Zaragoza (Spain)
2. Department of Physics, Brookhaven National Laboratory, Upton, New York 11973 (United States)
3. Department of Physics and Materials Research Laboratory, 1110 West Green Street, University of Illinois at Urbana-Champaign, Illinois 61801 (United States)
4. Institute Laue-Langevin, 156X, 38042 Grenoble CEDEX (France)
5. Magnetics Group, Naval Surface Warfare Center, 10901 New Hampshire Avenue, White Oak, Silver Spring, Maryland 20903-5000 (United State

The low-temperature ([ital T]=0 K) first-order phase transition, predicted to drive systems with both weak random and uniform cubic anisotropy from a correlated spin glass to a ferromagnet, has been observed. At higher temperatures the transition is to a quasi- or random ferromagnet. The transition occurs at a concentration [ital x][sub [ital t]]=0.62[plus minus]0.01 in the [ital crystalline] Laves-phase compounds Dy[sub [ital x]]Y[sub 1[minus][ital x]]Al[sub 2]. At concentrations above [ital x][sub [ital t]], a line of transition is observed between the paramagnetic and random ferromagnetic phases, as found previously. This line is characterized by the crossover exponent [phi][sub [Delta]]=0.80[plus minus]0.08, in good agreement with prediction. Two multicritical points have been identified at [ital x][sub [ital t]]=0.62[plus minus]0.01, [ital T][sub [ital t]]=29.5[plus minus]0.1 K and at around [ital x][sub [ital t]][sup [prime]]=0.87, [ital T][sub [ital t]][sup [prime]]=45.4 K.

• OSTI ID: 6669964
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 47:13; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360606* -- Other Materials-- Physical Properties-- (1992-)
ALUMINIUM COMPOUNDS
ANISOTROPY
DYSPROSIUM COMPOUNDS
FERROMAGNETISM
MAGNETIC PROPERTIES
MAGNETISM
PHYSICAL PROPERTIES
RANDOMNESS
RARE EARTH COMPOUNDS
SPIN GLASS STATE
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS