Colossal magnetoresistance (CMR), as the name implies, is the phenomenon of dramatic changes in resistance attendant upon application of a magnetic field. The typical CMR material is derived from perovskite manganites with the chemical formula Ln1−xAxMnO3, where Ln is the rare earth (Ln = La, Pr, Nd, Sm) and A is the divalent metal (A = Ca, Ba, Sr). The objective of this paper is to study the effects of the doping Nd and Pr at La site on La-Ba-Mn-O ceramics using solid state reaction. The characteristics and magnetotransport properties of CMR materials are investigated. Polycrystalline (La1−xPrx)0.67Ba0.33MnO3 (x = 0, 1/6, 1/3, 1/2, 2/3, 5/6, 1) and (La1−xPrx)0.67Ba0.33MnO3 (x = 0, 1/6, 1/3, 1/2, 2/3, 5/6, 1), are doped with Pr and Nd site based manganites, calcined at 900°C for 12 hours, pelletized and sintered at 1300°C for 24 hours have been synthesized and investigated. The magnetoresistance (MR) effects are measured using the four point probe technique. The magnetoresistance defined as MR% = (Ro−RH)/RH × 100 was measured at a magnetic field of H ≤ 1T at room temperature. The MR values were increased from 7.9–12.7% and from 7.9–12.3% for doping with Nd (x = 0.17) and Pr (x = 0.33) respectively. The electrical property, Tp was determined by using standard four-point probe resistivity measurement in a temperature range of 20 K to 300 K. The result shows that Pr and Nd dopants shift the value of TP to a lower temperature. In this paper the structural pattern and microstructure property of bulk samples have been investigated via XRD, AFM and SEM. XRD patterns show that these systems are in single-phase with orthorhombic distorted perovskite structures. The rms roughness for the AFM images has obtained for undoped and doped samples. SEM micrographs have shown that undoped samples are observed to be more compact than the doped samples doped due to the existence of pores. The potential of this research is to produce magnetoresistive read head such as read/write heads in computer disc-drives, position sensor, magnetoresistive random access memory (MRAM), biomagnetic sensor and magnetic accelerometers.
Skip Nav Destination
ASME 7th Biennial Conference on Engineering Systems Design and Analysis
July 19–22, 2004
Manchester, England
ISBN:
0-7918-4173-1
PROCEEDINGS PAPER
Structural, Electrical Transport and Magnetoresistive Studies of Pr and Nd Substituted on La2/3Ba1/3MnO3 Perovskite
A. Huda,
A. Huda
University Putra Malaysia, Serdang, Selangor, Malaysia
Search for other works by this author on:
S. A. Halim,
S. A. Halim
University Putra Malaysia, Serdang, Selangor, Malaysia
Search for other works by this author on:
K. P. Lim,
K. P. Lim
University Putra Malaysia, Serdang, Selangor, Malaysia
Search for other works by this author on:
K. K. Kabashi,
K. K. Kabashi
University Putra Malaysia, Serdang, Selangor, Malaysia
Search for other works by this author on:
S. Elias,
S. Elias
University Putra Malaysia, Serdang, Selangor, Malaysia
Search for other works by this author on:
A. A. Sidek,
A. A. Sidek
University Putra Malaysia, Serdang, Selangor, Malaysia
Search for other works by this author on:
Z. Hishamuddin
Z. Hishamuddin
University Putra Malaysia, Serdang, Selangor, Malaysia
Search for other works by this author on:
A. Huda
University Putra Malaysia, Serdang, Selangor, Malaysia
S. A. Halim
University Putra Malaysia, Serdang, Selangor, Malaysia
K. P. Lim
University Putra Malaysia, Serdang, Selangor, Malaysia
K. K. Kabashi
University Putra Malaysia, Serdang, Selangor, Malaysia
S. Elias
University Putra Malaysia, Serdang, Selangor, Malaysia
A. A. Sidek
University Putra Malaysia, Serdang, Selangor, Malaysia
Z. Hishamuddin
University Putra Malaysia, Serdang, Selangor, Malaysia
Paper No:
ESDA2004-58535, pp. 375-382; 8 pages
Published Online:
November 11, 2008
Citation
Huda, A, Halim, SA, Lim, KP, Kabashi, KK, Elias, S, Sidek, AA, & Hishamuddin, Z. "Structural, Electrical Transport and Magnetoresistive Studies of Pr and Nd Substituted on La2/3Ba1/3MnO3 Perovskite." Proceedings of the ASME 7th Biennial Conference on Engineering Systems Design and Analysis. Volume 1. Manchester, England. July 19–22, 2004. pp. 375-382. ASME. https://doi.org/10.1115/ESDA2004-58535
Download citation file:
7
Views
Related Proceedings Papers
Related Articles
Thermal Characterization of Cu ∕ CoFe Multilayer for Giant Magnetoresistive Head Applications
J. Heat Transfer (February,2006)
On the Thermal Behavior of Giant Magnetoresistance Heads
J. Tribol (April,2001)
Sensing Behavior of Magnetorheological Elastomers
J. Mech. Des (September,2009)
Related Chapters
Evolutions of the Stress-Induced Magnetic Fields of Steel Samples with Cracks
Asset Integrity Management of Critical Infrastructure
Electrical Properties of Calcareous Sediments
Geotechnical Properties, Behavior, and Performance of Calcareous Soils
Surface Analysis and Tools
Tribology of Mechanical Systems: A Guide to Present and Future Technologies