Spin dynamics of the antiferromagnetic-to-ferromagnetic phase transition in FeRh on a sub-picosecond time scale

Journal Article · Mon Oct 04 00:00:00 EDT 2004 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.1799244· OSTI ID:20634319

Thiele, Jan-Ulrich; Buess, Matthias; Back, Christian H ^[1]

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1. Hitachi Global Storage Technologies, San Jose Research Center, 650 Harry Road, San Jose, California 95120 (United States)

The antiferromagnetic-to-ferromagnetic phase transition in FeRh films induced by heating with a femtosecond laser pulse was investigated using the time-resolved magneto-optical Kerr effect. An initial rise time of the magneto-optical signal of about 500 fs is found as the FeRh is heated through the transition. The data offer a complementary view to previous pump-probe experiments on 'simple' ferromagnetic materials and allow a glimpse at the complex interplay between lattice, electron and spin dynamics governing the first-order antiferromagnetic-to-ferromagnetic phase transition of FeRh.

• OSTI ID: 20634319
• Journal Information: Applied Physics Letters, Vol. 85, Issue 14; Other Information: DOI: 10.1063/1.1799244; (c) 2004 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANTIFERROMAGNETISM
ELECTRONS
FERROMAGNETISM
HEATING
IRON ALLOYS
KERR EFFECT
LASERS
MAGNETIZATION
MAGNETO-OPTICAL EFFECTS
PHASE TRANSFORMATIONS
PULSE RISE TIME
PULSES
REFLECTIVITY
RHODIUM ALLOYS
SIGNALS
SPIN
THIN FILMS
TIME RESOLUTION