The influence of Nd dopants on spin and orbital moments in Nd-doped permalloy thin films

Journal Article · Mon Aug 25 00:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4894180· OSTI ID:22310959

Luo, Chen; Zhang, Wen; Zhai, Ya ^[1]; Wong, P. K. J. ^[2]; You, Biao; Du, Jun; Zhai, Hongru ^[3]

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1. Physics Department, Southeast University, Nanjing 211189 (China)
2. NanoElectronics Group, MESA+ Institute of Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede (Netherlands)
3. National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093 (China)

Magnetic properties of Nd{sub X}-Ni{sub 80}Fe{sub 20(1−X)} thin films have been investigated using x-ray absorption spectroscopy and x-ray magnetic circular dichroism (XMCD) at room temperature. With the Nd concentration increasing, the ratio of orbital-to-spin moment of Ni and Fe increases significantly, indicating that the spin-orbit coupling in permalloy thin films is enhanced due to the Nd impurities. The spin and orbital moments have been obtained by the sum rules analysis, which shows that the Nd impurities lead to a strong dispersion of spin moments of Fe and Ni while have no effect on orbital moments in Nd-doped permalloy thin films. Element-specific XMCD hysteresis loops suggest an antiferromagnetic coupling between the magnetic moments of Nd and permalloy at room temperature. The static magnetic properties have been studied by vibrating sample magnetometer for comparison, which shows a nice agreement with the XMCD results.

• OSTI ID: 22310959
• Journal Information: Applied Physics Letters, Vol. 105, Issue 8; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION SPECTROSCOPY
ANTIFERROMAGNETISM
DISPERSIONS
DOPED MATERIALS
HYSTERESIS
IMPURITIES
IRON ALLOYS
L-S COUPLING
MAGNETIC CIRCULAR DICHROISM
MAGNETIC MOMENTS
MAGNETIC PROPERTIES
NICKEL ALLOYS
PERMALLOY
SPIN
SUM RULES
TEMPERATURE RANGE 0273-0400 K
THIN FILMS
VIBRATING SAMPLE MAGNETOMETERS
X RADIATION
X-RAY SPECTROSCOPY