Majetich Research Group Home Page

I. People and Contact Information
II. Magnetic Nanoparticles: Introduction and Projects
III. List of Recent Papers
IV. Financial Support

I. Majetich Group Members

Position	Name	Email	Phone Number	Room Number
Faculty	Sara Majetich	sara@cmu.edu	412-268-3105	Wean Hall 6404
Postdocs	Yuhang Cheng	yuhangc@cmu.edu	412-268-2319	Wean Hall 7416
	Shihai Kan	skan@andrew.cmu.edu	412-268-2770	Wean Hall 7421
Graduate Students	Yi Ding	yding+@andrew.cmu.edu	412-268-2319	Wean Hall 7416
	Madhur Sachan	msachan+@andrew.cmu.edu	412-268-2319	Wean Hall 7416
Undergraduates	Josh King	jjking@andrew.cmu.edu	-----	-----

For All:

II. Research on Magnetic Nanoparticles

I. Introduction to Magnetic Nanoparticles
II. Monodisperse Nanoparticle Synthesis and Characterization
III. Fe Nanoparticles in 2D and 3D Arrays
IV. a. FePt Nanoparticles for Data Storage Part I
b. FePt Nanoparticles for Data Storage Part II
V. Co Nanoparticles for Self-assembly and Alignment
VI. Magnetic Nanoparticles for Biomedicine
VII. Magnetic Composites of SmCo and Fe Nanoparticles
VIII. Small Angle X-Ray Scattering

III. Recent Papers

1. Fe nanoparticle arrays
2. FePt nanoparticles arrays
3. Fe nanoparticle time-dependent magnetization
4. Magnetic colloidal crystal arrays
5. Magnetic nanocomposites
6. Miscellaneous Magnetic Nanoparticles papers

1. Fe nanoparticle arrays

Structural Ordering Effects in Fe Nanoparticle 2D and 3D Arrays, D. Farrell, Y. Ding, S. A. Majetich, C. Sanchez-Hanke, and C. C. Kao, J. Appl. Phys. 95, 6636 (2004).

Dipolar interactions and structural coherence in iron nanoparticle arrays, Dorothy Farrell, Yuhang Cheng, Yi Ding, Saeki Yamamuro, Cecilia Sanchez-Hanke, Chi-Chang Kao, and Sara A. Majetich, J. Mag. Mater. 282, 1-5 (2004).

Small Angle neutron scattering for detection of spin coupling in iron nanoparticles, Yumi Ijiri, Christopher V. Kelly, Julie A. Borchers, James J. Rhyne, Dorothy F. Farrell, Sara A. Majetich, Appl. Phys. Lett. (submitted).

Tailoring the Magnetic Interactions of Monodisperse Nanoparticles, Dorothy Farrell, Yuhang Cheng, Yi Ding, Shihai Kan, Sara Majetich, and Yumi Ijiri, Proceedings of the Workshop on Nano-Scale Materials: From Science to Technology, April 5-9, 2004, Puri, India, Nova Press, (in press).

Iron nanoparticle assemblies: structures and magnetic behavior, D. Farrell, Y. Cheng, S. Kan, M. Sachan, Y. Ding, S. A. Majetich, and L. Yang, J. Physics: Conf. Ser. (in press).

Magnetic Interactions of Iron Nanoparticles in Arrays and Dilute Dispersions, Dorothy Farrell, Yuhang Cheng, R. William McCallum, and Sara A. Majetich, (invited feature article), J. Phys. Chem. B, (submitted).

Preparation and Characterization of Monodisperse Fe Nanoparticles, D. Farrell, S. A. Majetich, and J. P. Wilcoxon, J. Phys. Chem. 107, 11022-11030 (2003).

In-place and out-of-plane transverse susceptibility in close-packed arrays of monodisperse Fe nanoparticles, P. Poddar, Jessica K. Wilson, H. Srikanth, D. F. Farrell, and S. A. Majetich, Phys. Rev. (in press, 2003).

Self-Assembly of Iron Nanoparticle Arrays, S. A. Majetich and D. F. Farrell, MRS Symp. Proc. 759, MM1.4* (2003).

Magnetic Interactions in Fe Nanoparticle Arrays, D. Farrell, S. Yamamuro, Y. Ijiri, and S. A. Majetich, MRS Symp. Proc. 705, 303-314 (2002).

Magnetically stabilized preferential stacking in Fe nanoparticle arrays, S. Yamamuro, D. Farrell, and S. A. Majetich, Phys. Rev. B. 65, 224431 (2002).

Magnetic Properties of Fe Nanoparticle Arrays, D. Farrell, S. Yamamuro, and S. A. Majetich, MRS Symp. Proc. 674, U4.4.1-U4.4.6 (2001).

2. FePt nanoparticle arrays

Size Effect Study of the L1_0 Phase Transformation in FePt Nanoparticles, Yi Ding and Sara A. Majetich, MRS Conf. Proc. Symposium S (submitted).

Size Dependence, Nucleation, and Phase Transformation in FePt Nanoparticles, Y. Ding and S. A. Majetich (submitted).

Sintering Prevention and Phase Transformation in FePt nanoparticles, Y. Ding, S. A. Majetich, J. Kim, K. Barmak, H. Rollins, and P. Sides, J. Magn. Magn. Mater. 284, 336-341 (2004).

Phase transformation and magnetic moment in FePt nanoparticles, Y. Ding, D. Farrell, S. Yamamuro, and S. A. Majetich, J. Appl. Phys. 93, 7411 (2003).

Patterning self-assembled FePt nanoparticles, M. Chen, D. E. Nikles, H. Yin, S. Wang, J. W. Harrell, and S. A. Majetich, J. Magn. Magn. Mater. 266, 8-11 (2003).

Structure of Fe and FePt Nanoparticle Arrays, Saeki Yamamuro, Dorothy Farrell, Keith Humfeld, and Sara A. Majetich, MRS Symp. Proc. 636, D10.8.1-D10.8.6 (2001).

3. Fe nanoparticle time-dependent magnetization

Percolation, relaxation halt, and retarded van der Waals interaction in dilute systems of iron nanoparticles, R. V. Chamberlin, J.. Hemberger, A. Loidl, K. D. Humfeld, D. Farrell, S. Yamamuro, Y. Ijiri, and S. A. Majetich, Phys. Rev. B 66, 172403 (2002).

Magnetic Relaxation of Iron Nanoparticles, Ralp V. Chamberlin, Keith D. Humfeld, Dorothy Farrell, Saeki Yamamuro, Yumi Ijiri, and Sara Majetich, J. Appl. Phys. 91, 6961-6963 (2003).

Time dependent properties of Iron Nanoparticles, Keith D. Humfeld, Arit K. Giri, Sara A. Majeitch, and Eugene L. Venturini, IEEE Trans. Mag. 37, 2194 (2001).

4. Magnetic colloidal crystal arrays

Mesoscopic Monodisperse Ferromagnetic Colloids Enable Magnetically Controlled Photonic Crystals, X. L. Xu, S. A. Majetich, and S. A. Asher, J. Amer. Chem. Soc. 124, 13864-13868 (2002).

Superparamagnetic Photonic Crystals, Xiangling Xu, Gary Friedman, Keith D. Humfeld, Sara A. Majetich, and Sanford A. Asher, Adv. Mater. 13, 1681 (2001).

Synthesis and Utilization of Monodisperse Superparamagnetic Colloidal Particles for Magnetically Controlled Photonic Crystals, Xiangling Xu, Gary Friedman, Keith D. Humfeld, Sara A. Majetich, and Sanford A. Asher, Chem. Mater. 14, 1249-1256 (2002).

5. Magnetic nanocomposites

Combustion Driven Compaction of Nanostructured SmCo/Fe, Madhur Sachan and Sara A. Majetich, IEEE Trans. Mag. (in press).

S. Chu and S. A. Majetich, in Newark, DE, Aug. 18-22, 2002, G. C. Hadjipanayis and M. C. Bonder, eds., Rinton Press, Princeton, NJ, 2002. p. 905-912.

Synthesis and Magnetic Behavior of SmCo_5(1-x)Fe_x Nanocomposite Magnets, S. Chu, S. A. Majetich, M. Huang, and R. T. Fingers, 93, 9146 (2003).

Hard Magnetic Nanoparticles and Nanocomposites, Anit Giri, Krishna Chowdary, and Sara A. Majetich, MRS Symp. Proc. 577, 197-208 (1999).

AC Magnetic Properties of FeCo Nanocomposties, Anit K. Giri, Krishna M. Chowdary, Keith D. Humfeld, and Sara A. Majetich, IEEE Tran. Mag. 36, 3026-3029 (2000).

AC Magnetic Properties of Compacted FeCo Nanocomposites, Anit K. Giri, Krishna M. Chowdary, and Sara A. Majetich, (invited), Mater. Physics and Mechanics 1, 1-10 (2000).

6. Miscellaneous Magnetic Nanoparticle papers

Comparative Evaluation of the Reactivity and Efficiency of Different Nanoscale Zero-valent Iron Particles for TCE Dechlorination, Yueqiang Liu, Sara A. Majetich, Robert D. Tilton, David S. Sholl, and Gregory V. Lowry, Environmental Science and Technology 39, 1338-1345 (2005).

Gold-coated magnetic Nanoparticles for Biomedical Applications, Min Chen, Saeki Yamamuro, and Sara A. Majetich, J. Appl. Phys. 7551 (2003).

Photomagnetism and Structure in Cobalt Ferrite Nanoparticles, A. K. Giri, E. M. Kirkpatrick, P. Moongkhamklang, S. A. Majetich, and V. G. Harris, Appl. Phys. Lett. 80, 2341 (2002).

Effect of light on the Magnetic Properties of Cobalt Ferrite Nanoparticles, Anit K. Giri, Kelly Pellerin, Wanida Pongsaksawad, Monica Sorescu, and Sara A. Majetich, IEEE Tran. Mag. 36, 3029-3031 (2000).

Nuclear Magnetic Resonance Study of Carbon-Coated Cobalt Nanoparticles, Y. D. Zhang, J. I. Budnick, W. A. Hines, S. A. Majetich, and E. M. Kirckpatrick, Appl. Phys. Lett. 76, 94 (2000).

Neutron Powder Diffraction of Carbon-Coated Fe-Co Alloy Nanoparticles, J. Appl. Phys. 85, 4331 (1999).

IV. Financial Support

National Science Foundation:
#CTS-0227645, "Coated Monodisperse Magnetic Nanoparticles"
#ECS-0304453, "NIRT: Magnetically Driven Assembly Nanosystems"

American Chemical Society Petroleum Research Fund:
#37578-AC5, "Superferromagnetic Nanoparticle Arrays"

DARPA/AFoSR:
#F33615-01-2-2166, "Magnetic Metamaterials for Electromagnetic Applications"

DARPA/ONR:
#N000140110912, "Magnetic Nanoparticles for Manipulation and Control of Biological Processes"

DOE: #DE-FG07-02ER63507, "EMSP 2002: Transport, Targeting, and Applications of Functional Nanoparticles for Degradation of Chlorinated Organic Solvents"

Carnegie Mellon Data Storage Systems Center