Magnetostriction of single-crystal La/sub 2/CuO/sub 4/

Journal Article · Wed Feb 01 04:00:00 EST 1989 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.39.2898· OSTI ID:6481449

Oliveira, Jr, N F; Nicholls, J T; Shapira, Y; Dresselhaus, G; Dresselhaus, M S; Picone, P J; Gabbe, D R; Jenssen, H P

Longitudinal magnetostriction (..delta..l/l) experiments have been used to probe the magnetic phase diagram of single-crystal La/sub 2/CuO/sub 4/ at 4.2, 77, 145, and 191 K. The geometry used is (lparallelHparallelb-circumflex), where b-circumflex is a unit vector along the orthorhombic b axis, perpendicular to the CuO/sub 2/ planes. The observed transition is associated with an induced alignment, along the field direction, of the small out-of-plane canting of the Cu/sup 2+/ spins. At all temperatures, the transition is marked by a small increase in l, with ..delta..l/l about 2 to 3 x 10/sup -8/. A large hysteresis was observed at 4.2 K, with the transition field, H/sub t/, in the up trace being 60.1 kOe, and in the down trace 45.8 kOe. This hysteresis strongly decreases with increasing temperature. At 191 K the jump in l is still quite sharp indicating that the transition is still first order. Above 4.2 K, our values of H/sub t/ are in good agreement with those obtained on similar crystals using different techniques.

• Research Organization: Instituto de Fisica, Universidade de Sa-tildeo Paulo, Caixa Postal 20516, Sa-tildeo Paulo, Sa-tildeo Paulo, Brazil
• OSTI ID: 6481449
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 39:4; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
COPPER COMPOUNDS
CRYSTALS
CUPRATES
HYSTERESIS
LANTHANUM COMPOUNDS
LOW TEMPERATURE
MAGNETIC PROPERTIES
MAGNETOSTRICTION
MONOCRYSTALS
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
ULTRALOW TEMPERATURE