Campus Units

Physics and Astronomy, Ames Laboratory

Document Type

Article

Publication Version

Published Version

Publication Date

8-29-2016

Journal or Book Title

Applied Physics Letters

Volume

109

Issue

9

First Page

092402

DOI

10.1063/1.4961933

Abstract

ZrMnP and HfMnP single crystals are grown by a self-flux growth technique, and structural as well as temperature dependent magnetic and transport properties are studied. Both compounds have an orthorhombic crystal structure. ZrMnP and HfMnP are ferromagnetic with Curie temperatures around 370 K and 320 K, respectively. The spontaneous magnetizations of ZrMnP and HfMnP are determined to be 1.9 μB/f.u. and 2.1 μB/f.u., respectively, at 50 K. The magnetocaloric effect of ZrMnP in terms of entropy change (ΔS) is estimated to be −6.7 kJ m−3 K−1 around 369 K. The easy axis of magnetization is [100] for both compounds, with a small anisotropy relative to the [010] axis. At 50 K, the anisotropy field along the [001] axis is ∼4.6 T for ZrMnP and ∼10 T for HfMnP. Such large magnetic anisotropy is remarkable considering the absence of rare-earth elements in these compounds. The first principle calculation correctly predicts the magnetization and hard axis orientation for both compounds, and predicts the experimental HfMnP anisotropy field within 25%. More importantly, our calculations suggest that the large magnetic anisotropy comes primarily from the Mn atoms, suggesting that similarly large anisotropies may be found in other 3d transition metal compounds.

Comments

This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in: Lamichhane, Tej N., Valentin Taufour, Morgan W. Masters, David S. Parker, Udhara S. Kaluarachchi, Srinivasa Thimmaiah, Sergey L. Bud'ko, and Paul C. Canfield. "Discovery of ferromagnetism with large magnetic anisotropy in ZrMnP and HfMnP." Applied Physics Letters 109, no. 9 (2016): 092402, and may be found at DOI: 10.1063/1.4961933. Posted with permission.

Copyright Owner

The Author(s)

Language

en

File Format

application/pdf

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