Enhancement of ferromagnetism in Pd nanoparticle by swift heavy ion irradiation

Journal Article · Mon Feb 01 00:00:00 EST 2010 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3297882· OSTI ID:21347264

Kulriya, P K ^[1]; Mehta, B R ^[1]; Avasthi, D K; Agarwal, D C ^[2]; Thakur, P; Brookes, N B ^[3]; Chawla, A K; Chandra, R ^[4]

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1. Department of Physics, Thin Film Laboratory, Indian Institute of Technology, New Delhi 110 016 (India)
2. Inter-University Accelerator Centre, Aruna Asaf Ali Road, New Delhi 110067 (India)
3. European Synchrotron Radiation Facility (ESRF), BP 220, F-38043 Grenoble Cedex (France)
4. Nanoscience Laboratory, Institute Instrumentation Centre, Indian Institute of Technology Roorkee, Roorkee 247667 (India)

In this study, the effect of swift heavy ion irradiation on the magnetic properties of the Pd nanoparticles has been investigated. Structural investigations along with superconducting quantum interface device measurements show that ferromagnetic properties of the Pd nanoparticles are due to the deviation of their electronic structure from that of bulk. The electronic structure is further modified due to the creation of defects on ion irradiation, which results in 20 times increase in the saturation magnetization. The present study establishes that the defect induced modification of Pd 4d electronic structure is responsible for the ferromagnetic properties of the Pd nanoparticles.

• OSTI ID: 21347264
• Journal Information: Applied Physics Letters, Vol. 96, Issue 5; Other Information: DOI: 10.1063/1.3297882; (c) 2010 American Institute of Physics; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
CRYSTAL DEFECTS
ELECTRONIC STRUCTURE
FERROMAGNETIC MATERIALS
FERROMAGNETISM
HEAVY IONS
ION BEAMS
IRRADIATION
MAGNETIC PROPERTIES
MAGNETIZATION
NANOSTRUCTURES
PALLADIUM
PARTICLES
BEAMS
CHARGED PARTICLES
CRYSTAL STRUCTURE
ELEMENTS
IONS
MAGNETIC MATERIALS
MAGNETISM
MATERIALS
METALS
PHYSICAL PROPERTIES
PLATINUM METALS
TRANSITION ELEMENTS